Panasonic KX-FT63BX Service Manual page 103

6.3.2. ASIC (IC1)
This custom IC is used for general FAX operations.
1. CPU
This model uses a Z80 equivalent CPU operating at 6MHz.
Many of the peripheral functions are handled by custom designed LSIs. As a result, the CPU only needs to process the result.
2. RTC
Real time clock.
3. DECODER
Decodes the address.
4. ROM/RAM I/F
Controls the SELECT signal of ROM or RAM and bank switching.
5. CIS I/F
Controls document reading.
6. IMAGE DATA RAM
This is inside the ASIC and has 8KB which is used for image processing.
7. THERMAL HEAD I/F
Transmits the recorded data to the thermal head.
8. MOTOR I/F
Controls the motor which feeds the document and feeds the reading document.
9. OPERATION PANEL I/F
Control port for Operation Panel.
10. I/O PORT
I/O Port Interface (for analog board port control).
11. ANALOG BLOCK
Electronic volume for the handset and monitor.
Sends beep tones, etc.
Descriptions of Pin Distribution (IC1)
NO SIGNAL
1 AIN1
2 AIN2
3 AIN3
4 AMON
5 VSSB
6 VDDB
7 VDD(3.3V/B)
8 X32OUT
9 X32IN
10 VSS
11 XBACEN
12 VDD(5V/B)
13 XRAMCS
14 FTG
15 F1
16 F2/OP
17 FR/OP
18 CPC
19 VDD(5V)
20 VSS
21 RVN
22 IRDATXD/IOP
23 IRDARXD/IOP80
24 TXD/IOP
25 RXD/IOP
26 XRTS/IOP
27 XCTS/IOP
28 MIDAT/IOP
I/O POWER SUPPLIED
VOLTAGE
A 3.3V CCD IMAGE SIGNAL INPUT
A 3.3V THERMISTOR TEMPERATURE WATCH INPUT
A 3.3V
A 3.3V ANALOG SIGNAL MONITOR TERMINAL
GND POWER SOURCE (ANALOG GND)
3.3V POWER SOURCE (ANALOG 3.3V)
3.3V/BATT POWER SOURCE (+3.3V/LITHIUM BATTERY)
O 3.3V/BATT RTC (32.768KHz) CONNECTION
I 3.3V/BATT RTC (32.768KHz) CONNECTION
GND GND
I 5V/BATT BACKUP ENABLE
5V/BATT POWER SOURCE (+5V/LITHIUM BATTERY)
O 5V/BATT RAM (IC4) CHIP SELECT
O 5V SH SIGNAL OUTPUT FOR CIS (SI)
O 5V 01SIGNAL OUTPUT FOR CIS(CLK)
O 5V OUTPUT PORT (LED ON)
O 5V ACK (DTMF RECEIVER CONTROL)
I 5V INPUT PORT (CPC)
5V POWER SOURCE (+5V)
5V POWER SOURCE (GND)
I 5V INPUT PORT (CISSEL)
I 5V INPUT PORT (JAM)
O 5V OUTPUT PORT
O 5V OUTPUT PORT
O 5V OUTPUT PORT (TELRXENB)
O 5V OUTPUT PORT (P-SHORT)
O 5V OUTPUT PORT (MDMTXENB)
O 5V OUTPUT PORT (TONE1ENB)
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KX-FT63BX / KX-FT63BX-W
DESCRIPTION