Control Section - Panasonic KX-FT982LS-B Service Manual

6.3.

Control Section

6.3.1. ASIC (IC1)
This custom IC is used for the general FAX operations.
1. CPU:
This model uses a Z80 equivalent to the CPU operating
at 24 MHz. Most of the peripheral functions are performed
by custom-designed LSIs. Therefore, the CPU only works
for processing the results.
2. RTC:
Real Time Clock
3. DECODER:
Decodes the address.
4. ROM/RAM I/F:
Controls the SELECT signal of ROM or RAM and the
bank switching.
5. CIS I/F:
Controls the document reading.
Note:
This memory is incorporated into the ASIC (IC1) and used for the image processing.
Descriptions of Pin Distribution (IC1)
NO. SIGNAL
1 VSSA1
2 VDDA 3.3
3 AIN1
4 AIN2
5 AIN3
6 AMON
7 VSS1
8 X32OUT
9 X32IN
10 VDD (3.3V / B)
11 XBACKEN
12 XRAMCS
13 VDD (3.3V / B)
14 VDD (2.5V/B)
15 FTG
16 F1
17 F2/OP
18 FR/OP
19 CPC
20 RVN
21 IRDATXD
22 IRDARXD
23 TXD/IOP
24 RXD/IOP
25 RTS/IOP
26 CTS/IOP
27 VDD (2.5V)1
28 TONE1
29 TONE2
30 VOLUREF/VOLU1
31 VOLUOUT/VOLU2
32 VOLUIN/VOLU3
33 XNMI
34 FMEMDO/IOP
35 VDD (3.3V)1
36 VSS2
37 VSS3
6. IMAGE DATA RAM:
7. THERMAL HEAD I/F:
8. MOTOR I/F:
9. OPERATION PANEL I/F:
10. I/O PORT:
11. ANALOG UNIT:
I/O POWER SUPPLIED
VOLTAGE
GND
3.3V
A 3.3V
A 3.3V
A 3.3V
A 3.3V
GND
O 3.3V/BATT
I 3.3V/BATT
-----
I 3.3V/BATT
O 3.3V/BATT
-----
-----
O 3.3V
O 3.3V
O 3.3V
O 3.3V
I 3.3V
I 3.3V
I 3.3V
O 3.3V
I 3.3V
I/O 3.3V
I 3.3V
I/O 3.3V
-----
A 3.3V
A 3.3V
A 3.3V
A 3.3V
A 3.3V
I 3.3V
O 3.3V
-----
GND
GND
15
KX-FT982LS-B / KX-FT984LS-B / KX-FT988LS-B
This memory is programmed into the ASIC and uses 8
KB for the image processing.
Transmits the recorded data to the thermal head.
Controls the transmission motor which feeds the docu-
ment.
Controls the receiving motor which feeds the recording
paper.
Serial interface with Operation Panel.
I/O Port Interface.
Electronic volume for the monitor.
Sends beep tones, etc.
DESCRIPTION
POWER SOURCE (ANALOG GND)
POWER SOURCE (ANALOG +3.3V)
CIS IMAGE SIGNAL INPUT (ATN1)
THERMISTOR TEMPERATURE WATCH INPUT
LINE VOLTAGE DETECTION SIGNAL INPUT (DCIN)
ANALOG SIGNAL MONITOR TERMINAL
POWER SOURCE (GND)
RTC (32.768KHz) CONNECTION
RTC (32.768KHz) CONNECTION
POWER SOURCE (+3.3V/LITHIUM BATTERY)
BACKUP ENABLE
XRAMCS
POWER SOURCE(+3.3V / LITHIUM BATTERY)
POWER SOURCE (+2.5V / LITHIUM BATTERY)
SH SIGNAL OUTPUT FOR CIS (FTG)
01 SIGNAL OUTPUT FOR CIS (F1)
OUTPUT PORT (HEADON)
OUTPUT PORT (MDMRST)
INPUT PORT (BELL/CPC)
INPUT PORT (PAPER)
INPUT PORT (JAM)
OUTPUT PORT (HSTX MUTE)
TXD
RXD
RTS
CTS
POWER SOURCE (+2.5V)
TONE OUTPUT
TONE OUTPUT
ANALOG REF VOLTAGE
VOLUME OUTPUT
VOLUME INPUT
HIGH FIXED
OUTPUT PORT (LED ON)
POWER SOURCE (+3.3V)
POWER SOURCE (GND)
POWER SOURCE (GND)