Panasonic KX-FP88RS-B Service Manual ▷ View online
7.3. CONTROL SECTION
7.3.1. BLOCK DIAGRAM
+5V
CN506
IC501
ASIC
ASIC
ADR [15:13]
RBA [5:0]
ADR [12:0]
DB [7:0]
XRD
XWR
ADR [17:0]
D [7:0]
XWR
XRD
XRAS
XCAS
ADR [17:0]
ADR [12:0]
ABR [5:0]
ADR [12:0]
ABR [5:0]
ADR [11:0]
ADR [4:0]
ABR [0:2]
XRD
XCS
XROMCS
XRAS
XCAS
XMODEMCS
FMEMDI
OP-RESET
SENLEDON
PTOP
FILMEND
RESET IC
OUT
IN
+5V
+3.3V
+5V
IC514
ANALOG ASIC
CN501/
CN507
CN509
BATT
GND
FMEMDO
FMEMCS
FMEMCLK
XORESET
IC502
ROM
IC503
DRAM
D [7:0]
W/P
XWR
XRD
CLE
XCS
R/B
ALE
IC512
FLASH
MEMORY
ADR [14:0]
D [7:0]
XWR
XRD
IC504
SRAM
ADR [4:0]
D [7:0]
XWR
XCS
32.256MHz
XRD
TX
RX
IC505
MODEM
XORESET
MICLK MILAT
+5V/BATT
MIDATA
+3V/BATT
XWDERR
WRESETI
CN505
IC506
IC508
PS501
SW501
32.768KHz
TO
POWER SUPPLY
+24V, +5V, PG, DG
THDAT, THCLK, THLAT
STB1, STB2
KSTART, KLATC, KSCLK
KTXD
KRXD, JOG1, JOG2
TM
+24V
+24V
TO
THERMAL HEAD
CN504
TO
OPERATION PANEL
TO ANALOG BOARD
TO MIC
CN502
TM [3:0]
TXE
TM [3:0]
TO MOTOR
24MHz
VCC
CONTROL SECTION BLOCK DIAGRAM
KX-FP88RS-B
125
KX-FP88RS-B
7.3.2. MEMORY MAP
126
KX-FP88RS-B
This custom IC is used for the general FAX operations.
1. CPU:
This model uses a Z80 equivalent to the CPU operating at
8 MHz. Most of the peripheral functions are performed by
custom-designed LSIs. Therefore, the CPU only works for
processing the results.
8 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.
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. (See Fig. A.*)
for the image processing. (See Fig. A.*)
7. THERMAL HEAD I/F:
Transmits the recorded data to the thermal head.
8. MOTOR I/F:
Controls the transmission motor which feeds the document.
Controls the receiving motor which feeds the recording
paper.
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 handset and the monitor.
Sends beep tones, etc.
7.3.3.
ASIC (IC501)
Fig. A
Note*:
This memory is incorporated into the ASIC (IC501) and used for the image processing.
Fig. A shows the memory map of the Image Data RAM.
127
KX-FP88RS-B
7.3.4. ROM (IC502)
This 512KB ROM (EPROM or MASKROM) carries a common area of 32KB and bank areas which each have 8KB (BK4~BK63).
The addresses from 0000H to 7FFFH are for the common area and from 8000H to 9FFFH are for the bank areas.
The addresses from 0000H to 7FFFH are for the common area and from 8000H to 9FFFH are for the bank areas.
7.3.5. STATIC RAM (IC504)
This 32KB RAM carries a common area of 8KB and bank areas which each have 12KB. The addresses from 0000H to EFFFH are
for the common area and from A000H to CFFFH are for the bank area.
for the common area and from A000H to CFFFH are for the bank area.
7.3.6. DYNAMIC RAM (IC503)
The DRAM serves as CPU and receives memory.
The address is F200H~F3FFH (DRAM access window 1) and F600H~F7FFH (DRAM access window 2).
Descriptions of Pin Distribution (IC501)
NO.
SIGNAL
I/O
POWER SUPPLIED VOLTAGE
DESCRIPTION
1
AIN1
A
3.3V
CCD IMAGE SIGNAL INPUT
2
AIN2
A
3.3V
THERMISTOR TEMPERATURE WATCH INPUT
3
AIN3
A
3.3V
-----------
4
AMON
A
3.3V
ANALOG SIGNAL MONITOR TERMINAL
5
VSSB
GND
POWER SOURCE (ANALOG GND)
6
VDDB
3.3V
POWER SOURCE (ANALOG +3.3V)
7
VDD(3.3V/B)
3.3V/BATT
POWER SOURCE (+3.3V/LITHIUM BATTERY)
8
X32OUT
O
3.3V/BATT
RTC (32.768KHz) CONNECTION
9
X32IN
I
3.3V/BATT
RTC (32.768KHz) CONNECTION
10
VSS
GND
GND
11
XBACEN
I
5V/BATT
BACKUP ENABLE
12
VDD (5V/B)
5V/BATT
POWER SOURCE (+5V/LITHIUM BATTERY)
13
XRAMCS
O
5V/BATT
RAM (IC504) CHIP SELECT
14
XRAMCS2
O
5V/BATT
-----------
15
FTG
O
5V
SH SIGNAL OUTPUT FOR CIS
16
F1
O
5V
01 SIGNAL OUTPUT FOR CIS
17
F2/OP
O
5V
OUTPUT PORT (TONE TEN)
18
FR/OP
O
5V
OUTPUT PORT (LINE RLY)
19
VIDRST/IOP
O
5V
OUTPUT PORT (CIS ON)
20
SPHCLK/IOP
I
5V
INPUT PORT (CISLED ON)
21
DARKON/IOP
I
5V
INPUT PORT (SD)
22
ADSEL2/IOP
I
5V
INPUT PORT (ESD)
23
CPC
I
5V
INPUT PORT (CPC)
24
BELL
O
5V
OUTPUT PORT (NOT USED)
25
VDD (5V)
5V
POWER SOURCE (+5V)
26
VSS
GND
POWER SOURCE (GND)
27
RVN
I
5V
INPUT PORT (NOT USED) PULL DOWN
28
IRDATXD/IOP
O
5V
OUTPUT PORT(DTMF IMP)
29
IRDARXD/
IOP80
IOP80
I
5V
INPUT PORT (NOT USED) PULL DOWN
30
TXD/IOP
O
5V
OUTPUT PORT (RESERVED)
31
RXD/IOP
O
5V
OUTPUT PORT (RESERVED)
32
XRTS/IOP
O
5V
OUTPUT PORT (RESERVED)
33
XCTS/IOP
O
5V
OUTPUT PORT (RESERVED)
34
XDSR/IOP
O
5V
OUTPUT PORT (RESERVED)
35
DCD/IOP
O
5V
OUTPUT PORT (RESERVED)
36
XDTR/IOP
O
5V
OUTPUT PORT (RESERVED)
37
RI/CLK/IOP
O
5V
-----------
38
TONE1
5V
TONE OUTPUT
39
TONE2
5V
TONE OUTPUT
40
VOLUREF
5V
ANALOG REF VOLTAGE
41
VOLUOUT
5V
VOLUME OUTPUT
42
VOLUIN
5V
VOLUME INPUT
43
MIDAT/IOP
A
5V
MIDAT
44
MICLK/IOP
A
5V
MICLK
45
MILAT/IOP
A
5V
MILAT
46
XRESCS1
O
5V
OUTPUT PORT (NOT USED)
47
IOP90
O
5V
OUTPUT PORT (SPMUTE)
48
VSS
GND
POWER SOURCE (GND)
49
VDD (5V)
5V
POWER SOURCE (+5V)
128
KX-FP88RS-B