Sony CA-755 Maintenance Manual page 79

CXD1133Q-321 (NEC)
C-MOS 8-BIT MICROCOMPUTER
- TOP VIEW -
52
53
54
55
56
57
58 V (+5V)
DD
59
60
61
62
63
64
PIN PIN
I/O SIGNAL I/O SIGNAL
No. No.
1 I/O PA6 17 I/O PC6/CO0
2 I/O PA7 18 I/O PC7/CO1
3 I/O PB0 19 I NMI
4 I/O PB1 20 I INT1
5 21 I/O
I/O PB2 MODE1
6 I/O PB3 22 I RESET
7 I/O PB4 23 I/O MODE0
8 I/O PB5 24 – X2
9 I/O PB6 25 I X1
10 I/O PB7 26 – GND
11 27 –
I/O PC0/TxD A-GND
12 I/O PC1/RxD 28 I AN0
13 I/O PC2/SCK 29 I AN1
14 I/O PC3/INT2/TI 30 I AN2
15 I/O PC4/TO 31 I AN3
16 I/O PC5/CI 32 I AN4
25
X1
24 OSC
X2
11
PC0/TxD
12 8
PC1/RxD SERIAL I/O
13
PC2/SCK
19
NMI
20
INT1
8
INT
CONTROL
4
14
PC3/INT2/TI
TIMER
15 8
PC4/TO
16
PC5/CI
17
TIMER/EVENT
PC6/CO0
COUNTER
18 8
PC7/CO1
28-35
AN7-0 8
A/D
36
CONVERTER
V
AREF
37
AV 8
DD
27
A-GND
26
GND
58
V
DD
CA-755/755P
32
31
30
29
28
A-GND 27
GND 26
25
24
23
22
21
20
(AV , V =+5V)
DD DD
PIN PIN
I/O SIGNAL I/O SIGNAL
No. No.
33 I AN5 49 I/O PD0/AD0
34 I AN6 50 I/O PF1/AD1
35 I AN7 51 I/O PD2/AD2
36 I V 52 I/O PD3/AD3
AREF
37 – AV I/O
DD 53 PD4/AD4
38 O RD 54 I/O PD5/AD5
39 O WR 55 I/O PD6/AD6
40 O ALE 56 I/O PD7/AD7
41 I/O PF0/AB8 57 I STOP
42 I/O PF1/AB9 58 – V
DD
43 I/O I/O
PF2/AB10 59 PA0
44 I/O PF3/AB11 60 I/O PA1
45 I/O PF4/AB12 61 I/O PA2
46 I/O PF5/AB13 62 I/O PA3
47 I/O PF6/AB14 63 I/O PA4
48 I/O PF7/AB15 64 I/O PA5
16
LATCH
INC/DEC
PC
SP
EA
V A
B C MAIN G. R
D E
H L
EA'
V' A'
B' C' ALT G. R
D' E'
H' L'
BUFFER
8/16
8 INTERNAL DATA BUS
16 16
LATCH LATCH
16
16
READ/WRITE
CONTROL
38 39
RD WR
25 59
INPUT
X1 PA0
24 60
AN0-7
X2 PA1
57 61
CI
STOP PA2
62
INT 1
PA3
11 63
INT 2
PC0/TxD
PA4
12 64
NMI
PC1/RxD PA5
13 1
RESET
PC2/SCK PA6
14 2
RxD
PC3/INT2/TI PA7
15
STOP
PC4/TO
16 3
TI
PC5/CI PB0
17 4
V
PC6/CO0 PB1
18 5
X1, 2
PC7/CO1 PB2
6
PB3
7
OUTPUT
PB4
8
AB8-15
PB5
19 9
ALE
NMI PB6
20 10
CO0, 1
INT1 PB7
RD
28 49
TO
AN0 AD0/PD0
29 50
TxD
AN1 AD1/PD1
30 51
WR
AN2 AD2/PD2
31 52
AN3 AD3/PD3
32 53
INPUT/OUTPUT
AN4 AD4/PD4
33 54
AD0-7
AN5 AD5/PD5
34 55
MODE 0, 1
AN6 AD6/PD6
35 56
PA0-7
AN7 AD7/PD7
PB0-7
36 41
PC0-7
V
AREF AB8/PF0
37 42
PD0-7
A-V AB9/PF1
DD
27 43
PF0-7
A-GND AB10/PF2
44
SCK
AB11/PF3
45
AB12/PF4
46
AB13/PF5
47
AB14/PF6
22 48
RESET AB15/PF7
40
ALE
23 39
MODE 0 WR
21 38
MODE 1 RD
12 8
PROGRAM DATA
MEMORY MEMORY
(16k-BYTE) (256-BYTE)
8
6 16 8
PSW
INST. REG
6
INST.
DECODER
ALU
(8/16)
SYSTEM STAND BY
CONTROL CONTROL
40 21 23 22 57
ALE MODE0 RESET STOP
MODE1
; ANALOG DATA
; COUNTER
; MASKABLE INTERRUPT REQUEST 1
; MASKABLE INTERRUPT REQUEST 2
; NON-MASKABLE INTERRUPT REQUEST
; SYSTEM RESET
; RECEIVE DATA
; SYSTEM STOP
; TIMER
; REFERENCE VOLTAGE
AREF
; EXTERNAL CRYSTAL, X1; SYSTEM CLOCK INPUT
; ADDRESS BUS
; ADDRESS LATCH ENABLE
; COUNTER 0, 1
; READ STROBE
; TIMER
; TRANSMIT DATA
; WRITE STROBE
; ADDRESS/DATA BUS
; MEMORY MODE
; PORT A
; PORT B
; PORT C
; PORT D
; PORT F
; SERIAL CLOCK
16
8
PORT F 8
8
8
PORT D 8
8
8 PORT C 8
8 PORT B 8
8 PORT A 8
IC
41-48
PF7-0/AB15-8
49-56
PF7-0/AD7-0
11-18
PC7-0
3-10
PB7-0
59-64
1, 2
PA7-0
4-7