I 2 C Data; Data: Memory Regions - Analog Devices LINEAR LT8491 Manual

LT8491
OPERATION
2
I C DATA

Data: Memory Regions

Data in the LT8491 is arranged into six regions as shown
in Table 1.
2
Table 1. LT8491 I C Addressable Memory Regions
2
I C REG
REGION TYPE ADDR RANGE DESCRIPTION
Telemetry Registers 0x00-0x11
Status Registers 0x12-0x1F
Control Registers 0x20-0x27
Configuration Registers 0x28-0x5B
Manufacturer Registers 0x5C-0x61
Boot EEPROM 0x88-0xBD
Telemetry Region: These read-only registers indicate
telemetry such as temperature, voltage, current, power
and efficiency. These word-sized values must be read
2
using the I C word-read transaction to avoid retrieving
2
mismatched bytes (see I
See the Telemetry Operation and Telemetry Registers sec-
tions for further telemetry information.
16
S CHIP ADDR W A
A6:A0 0
FROM MASTER TO SLAVE
FROM SLAVE TO MASTER
Figure 3. I
S CHIP ADDR W A REG ADDR
A6:A0 0 0 b7:b0
Figure 4. I
S CHIP ADDR W A REG ADDR
A6:A0 0 0 b7:b0
Figure 5. I
Charging telemetry.
Charging and system status.
Control charging on/off and
EEPROM access.
Charger configuration settings.
Manufacturer Data.
Non-volatile storage of start-up
configuration.
C: Data Transfer Transactions).
For more information
REG ADDR A DATA A P
0 b7:b0 0 b7:b0 0
8491 F03
A: ACKNOWLEDGE (LOW)
A: NOT ACKNOWLEDGE (HIGH)
R: READ BIT (HIGH)
W: WRITE BIT (LOW)
S: START CONDITION
P: STOP CONDITION
2
C Byte-Write Transaction
A S CHIP ADDR R A
0 A6:A0 1 0
2
C Byte-Read Transaction
A S CHIP ADDR R A DATA0
0 A6:A0 1 b7:b0
2
C Word-Read Transaction
Status Region: These read-only registers indicate status
such as charging state, solar panel state, faults, timers
and others. Detailed status register descriptions are pro-
vided in the Status Registers section.
Control Region: These read-write registers are used to
start and stop the charger, write to the EEPROM, reset the
chip and other related functions. The contents of these
registers revert to their default values, as listed in the
2
I C Register Map, after power is cycled or the CTRL_
RESTART_CHIP register is written to 0x99. Detailed con-
trol register descriptions are provided in the I
Descriptions section.
Configuration Region: These read-write registers deter-
mine the charger settings such as timer limits, restart
options, V
BAT
power-up or reset, the configuration registers are auto-
matically loaded with data from the EEPROM (see the
Startup Sequence section). Factory default EEPROM val-
ues are provided in the I
figuration register descriptions are provided in the I
Register Descriptions section.
Manufacturer Region: These read-only registers indicate
manufacturer data that is determined at the factory.
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DATA A P
b7:b0 1
8491 F04
A DATA1 A P
0 b7:b0 1
8491 F05
stage voltages, and many others. After
2
C Register Map. Detailed con-
2
C Register
2
C
Rev. 0