Read Panasonic KX-FT982CA / KX-FT984CA / KX-FT988CA Service Manual online
15
KX-FT982CA-B / KX-FT984CA-B / KX-FT988CA-B
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.
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.
bank switching.
5. CIS I/F:
Controls the document reading.
6. IMAGE DATA RAM:
This memory is programmed into the ASIC and uses 8
KB for the image processing.
KB for the image processing.
7. THERMAL HEAD I/F:
Transmits the recorded data to the thermal head.
8. MOTOR I/F:
Controls the transmission motor which feeds the docu-
ment.
Controls the receiving motor which feeds the recording
paper.
ment.
Controls the receiving motor which feeds the recording
paper.
9. OPERATION PANEL I/F:
Serial interface with Operation Panel.
10. I/O PORT:
I/O Port Interface.
11. ANALOG UNIT:
Electronic volume for the monitor.
Sends beep tones, etc.
Sends beep tones, etc.
Note:
This memory is incorporated into the ASIC (IC1) and used for the image processing.
Descriptions of Pin Distribution (IC1)
NO.
SIGNAL
I/O
POWER SUPPLIED
VOLTAGE
DESCRIPTION
1
VSSA1
GND
POWER SOURCE (ANALOG GND)
2
VDDA 3.3
3.3V
POWER SOURCE (ANALOG +3.3V)
3
AIN1
A
3.3V
CIS IMAGE SIGNAL INPUT (ATN1)
4
AIN2
A
3.3V
THERMISTOR TEMPERATURE WATCH INPUT
5
AIN3
A
3.3V
LINE VOLTAGE DETECTION SIGNAL INPUT (DCIN)
6
AMON
A
3.3V
ANALOG SIGNAL MONITOR TERMINAL
7
VSS1
GND
POWER SOURCE (GND)
8
X32OUT
O
3.3V/BATT
RTC (32.768KHz) CONNECTION
9
X32IN
I
3.3V/BATT
RTC (32.768KHz) CONNECTION
10
VDD (3.3V / B)
-----
POWER SOURCE (+3.3V/LITHIUM BATTERY)
11
XBACKEN
I
3.3V/BATT
BACKUP ENABLE
12
XRAMCS
O
3.3V/BATT
XRAMCS
13
VDD (3.3V / B)
-----
POWER SOURCE(+3.3V / LITHIUM BATTERY)
14
VDD (2.5V/B)
-----
POWER SOURCE (+2.5V / LITHIUM BATTERY)
15
FTG
O
3.3V
SH SIGNAL OUTPUT FOR CIS (FTG)
16
F1
O
3.3V
01 SIGNAL OUTPUT FOR CIS (F1)
17
F2/OP
O
3.3V
OUTPUT PORT (HEADON)
18
FR/OP
O
3.3V
OUTPUT PORT (MDMRST)
19
CPC
I
3.3V
INPUT PORT (BELL/CPC)
20
RVN
I
3.3V
INPUT PORT (PAPER)
21
IRDATXD
I
3.3V
INPUT PORT (JAM)
22
IRDARXD
O
3.3V
OUTPUT PORT (HSTX MUTE)
23
TXD/IOP
I
3.3V
TXD
24
RXD/IOP
I/O
3.3V
RXD
25
RTS/IOP
I
3.3V
RTS
26
CTS/IOP
I/O
3.3V
CTS
27
VDD (2.5V)1
-----
POWER SOURCE (+2.5V)
28
TONE1
A
3.3V
TONE OUTPUT
29
TONE2
A
3.3V
TONE OUTPUT
30
VOLUREF/VOLU1
A
3.3V
ANALOG REF VOLTAGE
31
VOLUOUT/VOLU2
A
3.3V
VOLUME OUTPUT
32
VOLUIN/VOLU3
A
3.3V
VOLUME INPUT
33
XNMI
I
3.3V
HIGH FIXED
34
FMEMDO/IOP
O
3.3V
OUTPUT PORT (LED ON)
35
VDD (3.3V)1
-----
POWER SOURCE (+3.3V)
36
VSS2
GND
POWER SOURCE (GND)
37
VSS3
GND
POWER SOURCE (GND)
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