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General Description
The DS1886 controls and monitors all functions for SFF,
SFP, and SFP+ modules including all SFF-8472 func-
tionality for GPON/EPON and 10G PON ONU applica-
tions. The combination of the DS1886 with the MAX3710
supports all transmitter and receiver functionality. The
DS1886 includes modulation current control and APC set-
point control with tracking error adjustment. It continually
monitors RSSI for LOS generation. A 13-bit analog-to-
digital converter (ADC) monitors V
bias, laser modulation, and receive power to meet all
monitoring requirements. Receive power measurement
is differential with support for common mode to V
9-bit digital-to-analog converter (DAC) is included with
temperature compensation for APD bias control.
SFF, SFP, and PON ONU Modules
Ordering Information
appears at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated's website at www.maximintegrated.com.
SFP and PON ONU Controller
with Digital LDD Interface
, temperature, laser
CC
. A
CC
Applications
S Meets All SFF-8472 Control and Monitoring
Requirements
S Companion Controller for the MAX3710 Laser
Driver/Limiting Amplifier and MAX3945 Limiting
Amplifier
S MAX3710/DS1886 Combination Supports
Broad Spectrum of Continuous Mode and PON
Applications Up to 2.5GHz
S Temperature Lookup Table (LUT) to Compensate
for APC Tracking Error and Dual Closed-Loop
Variables
S Three Laser Control Modes
Dual Closed Loop: Laser Bias and Laser
Modulation Are Automatically Controlled with
Multiple LUTs to Compensate Dual Closed-Loop
Calibration Points
APC Loop: Laser Bias Automatically Controlled,
Laser Modulation Controlled by Temperature LUT
Open Loop: Laser Bias and Laser Modulation
Are Controlled by Temperature LUTs
S 13-Bit ADC
Laser Bias, Laser Power, and Receive Power
Support Internal and External Calibration
Differential Receive Power Input
Scalable Dynamic Range
Internal Direct-to-Digital Temperature Sensor
Alarm and Warning Flags for All Monitored
Channels
S 10-Bit DAC with Temperature Compensation for
APD Bias
S Digital I/O Pins: Transmit Disable Input/Output,
Rate Select Input, LOS Input/Output, Transmit
Fault Input/Output, and IN1 Status Monitor and
Fault input
S Comprehensive Fault Measurement System with
Maskable Alarm/Warnings
S Flexible Password Scheme Provides Three Levels
of Security
S 256-Byte A0h and 128-Byte Upper A2h EEPROM
2
S I
C-Compatible Interface
S 3-Wire Master to Communicate with the MAX3710/
MAX3711 Laser Driver/Limiting Amplifier and
MAX3945 Limiting Amplifier
DS1886
Features
19-6259; Rev 1; 8/12
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Summary of Contents for Maxim Integrated DS1886
-
Page 1: General Description
SFP and PON ONU Controller with Digital LDD Interface General Description Features The DS1886 controls and monitors all functions for SFF, S Meets All SFF-8472 Control and Monitoring SFP, and SFP+ modules including all SFF-8472 func- Requirements tionality for GPON/EPON and 10G PON ONU applica- S Companion Controller for the MAX3710 Laser tions. -
Page 2: Table Of Contents
DS1886 SFP and PON ONU Controller with Digital LDD Interface TABLE OF CONTENTS General Description ................1 Applications . - Page 3 3-Wire Slave Register Map and DS1886 Corresponding Location ....... . .
- Page 4 DS1886 SFP and PON ONU Controller with Digital LDD Interface TABLE OF CONTENTS (continued) A2h Lower Memory, Register 04h–05h: TEMP WARN HI ......... 44 A2h Lower Memory, Register 02h–03h: TEMP ALARM LO.
- Page 5 DS1886 SFP and PON ONU Controller with Digital LDD Interface TABLE OF CONTENTS (continued) A2h Lower Memory, Register 7Bh–7Eh: PASSWORD ENTRY (PWE) ....... . 55 A2h Lower Memory, Register 7Fh: TBL SEL .
- Page 6 DS1886 SFP and PON ONU Controller with Digital LDD Interface TABLE OF CONTENTS (continued) A2h Table 02h, Register A4h–A5h: TXB OFFSET ..........70 A2h Table 02h, Register A6h–A7h: TXP OFFSET .
- Page 7 DS1886 SFP and PON ONU Controller with Digital LDD Interface TABLE OF CONTENTS (continued) A2h Table 02h, Register EFh: 3WSET ............83 A2h Table 02h, Register F0h: 3WCTRL .
- Page 8 DS1886 SFP and PON ONU Controller with Digital LDD Interface LIST OF FIGURES Figure 1a. ADC Channel Only for TXP when BURST_MODE = 1 in Table 02h, Register 89h ....19 Figure 1b.
- Page 9 Table 7. DS1886 LUT Functions in Open Loop, APC Loop, and Dual Closed-Loop Modes....32 Table 8. DS1886 LUT Memory Map for 5-Row Table (Temperature Values Indicated in °C)......33 Table 9.
-
Page 10: Absolute Maximum Ratings
DS1886 SFP and PON ONU Controller with Digital LDD Interface ABSOLUTE MAXIMUM RATINGS (All voltages relative to ground.) Continuous Power Dissipation (T = +70NC) Voltage Range on IN1, DAC, LOS, RSSIP, RSSIN, TQFN (derate 28.6mW/NC above +70NC) ....2285.7mW REFIN, RSEL, TXF, TXMON, TXD ..-0.5V to (V + 0.5V) -
Page 11: Dac Electrical Characteristics
DS1886 SFP and PON ONU Controller with Digital LDD Interface DAC ELECTRICAL CHARACTERISTICS = +2.97V to +3.63V, T = -40NC to +95NC, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS UNITS Delta-Sigma Input Clock Frequency Reference Voltage Input (REFIN) Minimum 0.1µF to GND... -
Page 12: Ac Electrical Characteristics
DS1886 SFP and PON ONU Controller with Digital LDD Interface AC ELECTRICAL CHARACTERISTICS = +2.97V to +3.63V, T = -40NC to +95NC, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS UNITS TXD Rising Edge to Fault Clear From h TXD (Notes 8, 9) -
Page 13: I 2 C Ac Electrical Characteristics
DS1886 SFP and PON ONU Controller with Digital LDD Interface C AC ELECTRICAL CHARACTERISTICS = +2.97V to +3.63V, T = -40NC to +95NC, unless otherwise noted. Timing is referenced to V and V .) (Note 1) (See IL(MAX) IH(MIN) Figure 19.) -
Page 14: Typical Operating Characteristics
DS1886 SFP and PON ONU Controller with Digital LDD Interface Typical Operating Characteristics = +25°C, unless otherwise noted.) SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY CURRENT vs. TEMPERATURE 0.80 0.75 +95°C 0.70 = 3.9V 0.65 0.60 +25°C 0.55 = 2.85V = 3.3V 0.50... -
Page 15: Pin Configuration
DS1886 SFP and PON ONU Controller with Digital LDD Interface Pin Configuration Pin Description NAME FUNCTION Chip-Select Output. Part of the TOP VIEW CSEL2OUT 3-wire interface to the MAX3945. C Serial-Clock Input Open-Drain I C Serial-Data Input/ Output CSEL2OUT REFIN... -
Page 16: Block Diagram
DS1886 SFP and PON ONU Controller with Digital LDD Interface Block Diagram REFIN A2h MEMORY 10-BIT EEPROM/SRAM DELTA-SIGMA ADC CONFIGURATION/RESULTS, INTERFACE SYSTEM STATUS/CONTROL BITS, ALARMS/WARNINGS, LOOKUP TABLES, EEPROM USER MEMORY 256 BYTES AT A0h SDAOUT SCLOUT 3-WIRE MON_SEL MASTER CSEL1OUT... -
Page 17: Typical Operating Circuit-Gpon Onu
DS1886 SFP and PON ONU Controller with Digital LDD Interface Typical Operating Circuit—GPON ONU DS3920 DC-DC OUTPUT CURRENT MONITOR APD-TIA MAX3710 FAULT DISABLE BIAS LASER SIGNAL DETECT MD AND DFB MDIN BENP/N BMON DS1886 TX_FAULT TXFOUT EEPROM 2.5V REF REFIN... -
Page 18: Typical Operating Circuit-10G Pon Onu
DS1886 SFP and PON ONU Controller with Digital LDD Interface Typical Operating Circuit—10G PON ONU DS3920 DC-DC OUTPUT CURRENT MONITOR APD-TIA MAX3945 10G LA MAX3710 FAULT DISABLE BIAS LASER SIGNAL DETECT MD AND DFB 1.25G TO 2.5G TOSA MDIN BENP/N... -
Page 19: Detailed Description
Detailed Description Monitors and Fault Detection Monitors The DS1886 integrates the control and monitoring func- The DS1886 monitors five ADC channels. This monitoring tionality required to implement an SFP or PON ONU combined with the alarm enables (A2h Table 01h/05h) -
Page 20: Adc Monitors And Alarms
(TXP) signals to the DS1886’s TXMON input. ranges to calibrate the ADC input gain by a factor of The DS1886 has a burst mode option to allow internal to measure small signals (thereby reducing the full calculation of TXP using the MD0 and MD1 register scale by a factor of 2 ). -
Page 21: Right-Shifting Adc Result
Right-Shifting ADC Result Differential RSSI Input The right-shift operation on the ADC result is carried out The DS1886 offers a fully differential input for RSSI based on the contents of right-shift control registers (A2h that enables high-side monitoring of RSSI, as shown in... -
Page 22: Laser Bias And Laser Power Through Txmon
Digital LDD Interface Laser Bias and Laser Power Through TXMON APD Mode The DS1886 measures both laser bias (TXB) and laser For systems with a nonlinear relationship between the ADC power (TXP) through the same input pin, TXMON. The... -
Page 23: Pin Mode
(1/2 ) of the coarse mode full scale. abled, all SRAM locations are set to their defaults, The DS1886 now auto ranges to choose the range that shadowed EEPROM locations are zero, and all analog RSSI RESULT... -
Page 24: Power-On Analog (Poa)
SEE recall, but the device analog is shut down and Power-On Analog (POA) the outputs are disabled. If the supply voltage recovers POA holds the DS1886 in reset until V is at a suitable back above POA, the device immediately resumes nor- level (V >... -
Page 25: Delta-Sigma Output And Reference
0.1uF capacitor should be connected between REFIN REFIN and ground. If INV_DAC = 1, then DAC[9:0] = [3FF - (DAC_INT/ The DS1886’s delta-sigma output is 10 bits. For illustra- DACFS)] x V REFIN tive purposes, a 3-bit example is provided in... -
Page 26: Digital I/O Pins
DS1886 SFP and PON ONU Controller with Digital LDD Interface TXDS TXDIO TXDC TXDOUT TXDFLT TXFOUTS TXFOUT TXFINT INVTXF TXFS FAULT RESET TIMER (130ms) IN1EN INITR1 POWER-ON RESET IN1S PINS Figure 10. TXFOUT and TXDOUT Logic Diagram. RSEL RSELS The level of RSEL can be read by reading the STATUS... -
Page 27: Die Identification
8Bh, must be set to enable this functionality. this TXFOUT behavior during power-on. Latching of the Die Identification alarms is controlled by CNFGB and CNFGC Registers The DS1886 has an ID hardcoded in its die. Two (A2h Table 02h, Register 8Ah A2h Table 02h, registers (DEVICE ID... -
Page 28: Ds1886 Master Communication Interface
3-wire interface. The DS1886 configures the MAX3710 on startup and then continuously updates the MAX3710 with Protocol new LUT values. The DS1886 operates in one of three The DS1886 initiates a data transfer by asserting the modes: open loop, APC loop, and dual closed loop. The CSEL1OUT or CSEL2OUT pin. -
Page 29: 3-Wire Slave Register Map And Ds1886 Corresponding Location
Corresponding Location Figure 14 explains the working of the 3-wire master in When the MAX3945 registers are written, the MAX3710 the DS1886 in all three opreating modes. These modes are also written simultaneously (Table are described in the DS1886 with MAX3710 Operating Modes section. -
Page 30: Figure 14. 3-Wire Flowchart
TXD = 0? EN_3945 = 1? MANMODE ALLOWS THE USER TO DPC_EN = 1? TEMP_CONV = 1? COMMUNICATE WITH MAX3710 USING THE I INTERFACE ON DS1886 POR_FLAG = 1? > VCC LO? WRITE WRITE_LUT REGISTERS WRITE MODINC, SET_IMOD TXCTRL5 MODINC, SET_IMOD... -
Page 31: 3-Wire Power-On Reset
NOTE 2: MON_SEL BIT IS TOGGLED AS NEEDED TO KEEP THE TXP/TXB MONITORS CORRECT. Figure 15. MAX3710 Brownout Detection Flowchart 3-Wire Power-On Reset The DS1886 detects whether a power-on reset has occured on the slave 3-wire device. This is done using the flowchart shown in... -
Page 32: Ds1886 With Max3710 Operating Modes
10-bit bias DAC and 9-bit modulation DAC inside the 2NC temperature resolution and 8-bit offset LUTs. Each MAX3710. loop is initialized using 8-byte LUTs. Table 7. DS1886 LUT Functions in Open Loop, APC Loop, and Dual Closed-Loop Modes TABLE REGISTER OPEN LOOP... -
Page 33: Bias, Modulation, Set_2Xapc, Txctrl5 Luts
Table and TXCTRL5 are 5-row LUTs. Further details can be found in the LUT descriptions. Table 8. DS1886 LUT Memory Map for 5-Row Table (Temperature Values Indicated in °C) BYTE 0 BYTE 1 BYTE 2 BYTE 3... -
Page 34: Modulation Value
DS1886 SFP and PON ONU Controller with Digital LDD Interface EACH OFFSET REGISTER CAN BE INDEPENDENTLY EACH OFFSET REGISTER CAN BE INDEPENDENTLY SET BETWEEN 1023 1023 SET BETWEEN 0 AND 1020. 1020 = 4 x FFh. THIS 0 AND 1020. 1020 = 4 x FFh. THIS EXAMPLE ILLUSTRATES POSITIVE EXAMPLE ILLUSTRATES POSITIVE TEMPCO. -
Page 35: Power Leveling
The master interface is controllable using four registers applicable timing. in the DS1886: 3WCTRL, ADDRESS, WRITE, READ. Commands can be manually issued while the DS1886 is Repeated START Condition: The master can use a in normal operation mode. It is also possible to suspend... -
Page 36: Figure 19. I 2 C Timing Diagram
R/W bit in the least significant bit. an ACK by transmitting a zero during the 9th bit. The DS1886 responds to two slave addresses. The A device performs a NACK by transmitting a one auxiliary memory always responds to a fixed I during the 9th bit. -
Page 37: I 2 C Protocol
DS1886 SFP and PON ONU Controller with Digital LDD Interface the data. The memory address is always the second transmitting a memory address before each data byte byte transmitted during a write operation following the is sent. The address counter limits the write to one slave address byte. -
Page 38: Memory Organization
The below access codes describe each mode used by memory on the same page. Because the whole page the DS1886 with factory setting for the PW_ENA (A2h is written, bytes on the page that were not modified... -
Page 39: Figure 21. Memory Organization
DS1886 SFP and PON ONU Controller with Digital LDD Interface C ADDRESS A0h C ADDRESS A2h LOWER MEMORY NOTE: ALARM ENABLE ROW CAN BE CONFIGURED TO EXIST AT TABLE 01h OR TABLE 05h USING MASK BIT IN REGISTERS 89h, TABLE 02h. -
Page 40: Register Descriptions
DS1886 SFP and PON ONU Controller with Digital LDD Interface Register Descriptions The register maps show each byte/word (2 bytes) in terms of its row in the memory. The first byte in the row is located in memory at the row address (hexadecimal) in the leftmost column. Each subsequent byte on the row is one/two memory locations beyond the previous byte/word’s address. -
Page 41: A2H Table 02H Register Map
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h Register Map A2h TABLE 02h (PW2) WORD 0 WORD 1 WORD 2 WORD 3 ROW NAME (HEX) BYTE 0/8 BYTE 1/9 BYTE 2/A BYTE 3/B BYTE 4/C... -
Page 42: A2H Table 04H Register Map
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 04h Register Map A2h TABLE 04h (MODULATION OR TXCTRL5 LUT) WORD 0 WORD 1 WORD 2 WORD 3 ROW NAME (HEX) BYTE 0/8 BYTE 1/9 BYTE 2/A BYTE 3/B... -
Page 43: A2H Table 08H Register Map
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 08h Register Map A2h TABLE 08h (INC LUT) WORD 0 WORD 1 WORD 2 WORD 3 ROW NAME (HEX) BYTE 0/8 BYTE 1/9 BYTE 2/A BYTE 3/B BYTE 4/C... -
Page 44: A2H Lower Memory Register Descriptions
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Lower Memory Register Descriptions A2h Lower Memory, Register 00h–01h: TEMP ALARM HI A2h Lower Memory, Register 04h–05h: TEMP WARN HI FACTORY DEFAULT 7FFFh READ ACCESS WRITE ACCESS MEMORY TYPE... -
Page 45: A2H Lower Memory, Register 08H-09H: V
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Lower Memory, Register 08h–09h: V ALARM HI A2h Lower Memory, Register 0Ch–0Dh: V WARN HI A2h Lower Memory, Register 10h–11h: TXB ALARM HI A2h Lower Memory, Register 14h–15h: TXB WARN HI A2h Lower Memory, Register 18h–19h: TXP ALARM HI... -
Page 46: A2H Lower Memory, Register 0Ah-0Bh: V
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Lower Memory, Register 0Ah–0Bh: V ALARM LO A2h Lower Memory, Register 0Eh–0Fh: V WARN LO A2h Lower Memory, Register 12h–13h: TXB ALARM LO A2h Lower Memory, Register 16h–17h: TXB WARN LO A2h Lower Memory, Register 1Ah–1Bh: TXP ALARM LO... -
Page 47: A2H Lower Memory, Register 28H-37H: Empty
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Lower Memory, Register 28h–37h: EMPTY FACTORY DEFAULT READ ACCESS WRITE ACCESS MEMORY TYPE These registers are empty. A2h Lower Memory, Register 38h–5Fh: EE FACTORY DEFAULT READ ACCESS WRITE ACCESS... -
Page 48: A2H Lower Memory, Register 62H-63H: Vcc Value
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Lower Memory, Register 62h–63h: V VALUE A2h Lower Memory, Register 64h–65h: TXB VALUE A2h Lower Memory, Register 66h–67h: TXP VALUE A2h Lower Memory, Register 68h–69h: RSSI VALUE POWER-ON VALUE... -
Page 49: A2H Lower Memory, Register 6Eh: Status
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Lower Memory, Register 6Eh: STATUS POWER-ON VALUE X0XX 0XXXb READ ACCESS WRITE ACCESS See below description MEMORY TYPE Volatile Write Access TXDS TXDC TXFIS RSELS RESERVED TXFOUTS RDYB BIT 7 BIT 0 TXDS: TXD status bit. -
Page 50: A2H Lower Memory, Register 6Fh: Update
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Lower Memory, Register 6Fh: UPDATE POWER-ON VALUE READ ACCESS WRITE ACCESS All and DS1886 Hardware MEMORY TYPE Volatile TEMP RDY VCC RDY TXB RDY TXP RDY RSSI RDY RSSIR... -
Page 51: A2H Lower Memory, Register 70H: Alarm 3
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Lower Memory, Register 70h: ALARM POWER-ON VALUE READ ACCESS WRITE ACCESS MEMORY TYPE Volatile TEMP HI TEMP LO VCC HI VCC LO TXB HI TXB LO TXP HI TXP LO... -
Page 52: A2H Lower Memory, Register 71H: Alarm 2
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Lower Memory, Register 71h: ALARM POWER-ON VALUE READ ACCESS WRITE ACCESS MEMORY TYPE Volatile RSSI HI RSSI LO RESERVED RESERVED RESERVED IN1S RESERVED TXFINT BIT 7 BIT 0 RSSI HI: High alarm status for RSSI measurement. A TXD event does not clear this alarm. -
Page 53: A2H Lower Memory, Register 74H: Warn 3
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Lower Memory, Register 74h: WARN POWER-ON VALUE READ ACCESS WRITE ACCESS MEMORY TYPE Volatile TEMP HI TEMP LO VCC HI VCC LO TXB HI TXB LO TXP HI TXP LO... -
Page 54: A2H Lower Memory, Register 75H: Warn 2
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Lower Memory, Register 75h: WARN POWER-ON VALUE READ ACCESS WRITE ACCESS MEMORY TYPE Volatile RSSI HI RSSI LO RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED BIT 7 BIT 0 RSSI HI: High warning status for RSSI measurement. -
Page 55: A2H Lower Memory, Register 7Bh-7Eh: Password Entry (Pwe)
BIT 0 There are two passwords for the DS1886. Each password is 4 bytes long. The lower level password (PW1) will have all the access of a normal user plus those made available with PW1. The higher level password (PW2) will have all of the access of PW1 plus those made available with PW2. -
Page 56: A2H Table 01H Register Descriptions
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 01h Register Descriptions A2h Table 05h can be configured to contain the alarm and warning enable bytes from A2h Table 01h, Registers F8h– FFh with the MASK bit enabled (A2h Table 02h, Register 89h). -
Page 57: A2H Table 01H, Register F8H: Alarm En 3
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 01h, Register F8h: ALARM EN POWER-ON VALUE READ ACCESS PW2 or (PW1 and RWTBL1C) or (PW1 and RTBL1C) WRITE ACCESS PW2 or (PW1 and RWTBL1C) MEMORY TYPE Nonvolatile (SEE) -
Page 58: A2H Table 01H, Register F9H: Alarm En 2
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 01h, Register F9h: ALARM EN POWER-ON VALUE READ ACCESS PW2 or (PW1 and RWTBL1C) or (PW1 and RTBL1C) WRITE ACCESS PW2 or (PW1 and RWTBL1C) MEMORY TYPE Nonvolatile (SEE) -
Page 59: A2H Table 01H, Register Fch: Warn En 3
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 01h, Register FCh: WARN EN POWER-ON VALUE READ ACCESS PW2 or (PW1 and RWTBL1C) or (PW1 and RTBL1C) WRITE ACCESS PW2 or (PW1 and RWTBL1C) MEMORY TYPE Nonvolatile (SEE) -
Page 60: A2H Table 01H, Register Fdh: Warn En 2
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 01h, Register FDh: WARN EN POWER-ON VALUE READ ACCESS PW2 or (PW1 and RWTBL1C) or (PW1 and RTBL1C) WRITE ACCESS PW2 or (PW1 and RWTBL1C) MEMORY TYPE Nonvolatile (SEE) -
Page 61: A2H Table 02H Register Descriptions
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h Register Descriptions A2h Table 02h, Register 80h: MODE POWER-ON VALUE READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) -
Page 62: A2H Table 02H, Register 81H: Temperature Index (Tindex)
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register 81h: Temperature Index (TINDEX) FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS (PW2 and AEN = 0) or (PW1 and RWTBL246 and AEN = 0) -
Page 63: A2H Table 02H, Register 85H: Apc Value
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register 85h: APC VALUE FACTORY DEFAULT 0000h READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS (PW2 and APC LUT EN = 0) or (PW1 and RWTBL246 and APC LUT EN = 0) -
Page 64: A2H Table 02H, Register 89H: Cnfga
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register 89h: CNFGA FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE Nonvolatile (SEE) -
Page 65: A2H Table 02H, Register 8Ah: Cnfgb
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register 8Ah: CNFGB FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE Nonvolatile (SEE) -
Page 66: A2H Table 02H, Register 8Bh: Cnfgc
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register 8Bh: CNFGC FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE Nonvolatile (SEE) -
Page 67: A2H Table 02H, Register 8Dh: Cnfgd
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register 8Dh: CNFGD FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE Nonvolatile (SEE) -
Page 68: A2H Table 02H, Register 8Fh: Right-Shift (Rshift )
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register 8Fh: RIGHT-SHIFT (RSHIFT FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE Nonvolatile (SEE) -
Page 69: A2H Table 02H, Register 92H-93H: V
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register 92h–93h: V SCALE A2h Table 02h, Register 94h–95h: TXB SCALE A2h Table 02h, Register 96h–97h: TXP SCALE A2h Table 02h, Register 98h–99h: RSSI FINE SCALE A2h Table 02h, Register 9Ah–9Bh: RESERVED A2h Table 02h, Register 9Ch–9Dh: RSSI COARSE SCALE... -
Page 70: A2H Table 02H, Register A0H-A1H: Xover Fine
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register A0h–A1h: XOVER FINE FACTORY DEFAULT FFFFh READ ACCESS PW2 or (PW1 and RWTBL2) or (PW1 and RTBL2) WRITE ACCESS PW2 or (PW1 and RWTBL2) MEMORY TYPE... -
Page 71: A2H Table 02H, Register Aeh-Afh: Internal Temp Offset
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register AEh–AFh: INTERNAL TEMP OFFSET FACTORY CALIBRATED READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE... -
Page 72: A2H Table 02H, Register B4H-B7H: Pw2
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register B4h–B7h: PW2 FACTORY DEFAULT FFFF FFFFh READ ACCESS WRITE ACCESS MEMORY TYPE Nonvolatile (SEE) BIT 7 BIT 0 The PWE value is compared against the value written to this location to enable PW2 access. At power-on, the PWE value is set to all ones. -
Page 73: A2H Table 02H, Register C0H: Pw_Ena
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register C0h: PW_ENA FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE Nonvolatile (SEE) -
Page 74: A2H Table 02H, Register C1H: Pw_Enb
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register C1h: PW_ENB FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE Nonvolatile (SEE) -
Page 75: A2H Table 02H, Register C2H-C6H: Reserved
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register C2h–C6h: RESERVED FACTORY DEFAULT READ ACCESS WRITE ACCESS MEMORY TYPE Nonvolatile (SEE) These registers are reserved. A2h Table 02h, Register C7h: TBLSELPON FACTORY DEFAULT READ ACCESS... -
Page 76: A2H Table 02H, Register Cah: Incbyte
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register CAh: INCBYTE FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS (PW2 and BIAS LUT EN = 0) or (PW1 and RWTBL246 and BIAS LUT EN = 0) -
Page 77: A2H Table 02H, Register Cdh: Ibiasmax
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register CDh: IBIASMAX FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE Volatile BIT 7 BIT 0 Value written to MAX3710 IBIASMAX from the BIAS MAX LUT. -
Page 78: A2H Table 02H, Register D0H-Dfh: Empty
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register D0h–DFh: EMPTY FACTORY DEFAULT READ ACCESS WRITE ACCESS MEMORY TYPE None These registers do not exist. A2h Table 02h, Register E0h: RXCTRL1 FACTORY DEFAULT READ ACCESS... -
Page 79: A2H Table 02H, Register E2H: Setcml
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register E2h: SETCML FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE Nonvolatile (SEE) -
Page 80: A2H Table 02H, Register E5H: Txctrl2
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register E5h: TXCTRL2 FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE Nonvolatile (SEE) -
Page 81: A2H Table 02H, Register E8H: Txctrl5 Apc Ol
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register E8h: TXCTRL5 APC OL FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE... -
Page 82: A2H Table 02H, Register Ebh: Reserved
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register EBh: RESERVED FACTORY DEFAULT READ ACCESS WRITE ACCESS MEMORY TYPE Nonvolatile (SEE) This register is reserved. A2h Table 02h, Register ECh: SETLOSH_3945 FACTORY DEFAULT READ ACCESS... -
Page 83: A2H Table 02H, Register Eeh: Setlostimer_3945
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register EEh: SETLOSTIMER_3945 FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE Nonvolatile (SEE) -
Page 84: A2H Table 02H, Register F0H: 3Wctrl
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register F0h: 3WCTRL FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE Volatile RESERVED... -
Page 85: A2H Table 02H, Register F2H: Write
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register F2h: WRITE FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) MEMORY TYPE Nonvolatile (SEE) -
Page 86: A2H Table 02H, Register F5H: Txstat1
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 02h, Register F5h: TXSTAT1 FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS MEMORY TYPE Nonvolatile (SEE) BIT 7 BIT 0 A 3-wire slave register. This value is read from a Maxim laser driver with the 3-wire interface every t (see the Analog Voltage Monitoring Characteristics table). -
Page 87: A2H Table 04H Register Descriptions
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 04h Register Descriptions A2h Table 04h, Register 80h–A7h: MODULATION or TXCTRL5 LUT FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) -
Page 88: A2H Table 04H, Register F8H-Ffh: Mod Offset Or Set_Imod Lut
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 04h, Register F8h–FFh: MOD OFFSET or SET_IMOD LUT FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246) WRITE ACCESS PW2 or (PW1 and RWTBL246) -
Page 89: A2H Table 06H, Register A8H-Efh: Empty
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 06h, Register A8h–EFh: EMPTY FACTORY DEFAULT READ ACCESS WRITE ACCESS MEMORY TYPE These registers are empty. A2h Table 06h, Register F0h–F7h: BIAS MAX LUT FACTORY DEFAULT READ ACCESS... -
Page 90: A2H Table 08H Register Descriptions
DS1886 SFP and PON ONU Controller with Digital LDD Interface A2h Table 08h Register Descriptions A2h Table 08h, Register 80h–F7h: EMPTY FACTORY DEFAULT READ ACCESS WRITE ACCESS MEMORY TYPE These registers are empty. A2h Table 08h, Register F8h–FFh: INCBYTE FACTORY DEFAULT... -
Page 91: Auxiliary Memory A0H Register Description
DS1886 SFP and PON ONU Controller with Digital LDD Interface Auxiliary Memory A0h Register Description Auxiliary Memory A0h, Register 00h–FFh: EEPROM FACTORY DEFAULT READ ACCESS PW2 or (PW1 and RWAUXA) or (PW1 and RWAUXAU) WRITE ACCESS PW2 or (PW1 and RWAUXA) -
Page 92: Revision History
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed.
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