Sanyo DC-X8CT Service Manual page 51

Separate mini component system
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IC BLOCK DIAGRAM & DESCRIPTION
IC531 M38197MAA-636FP (Single Chip 8-bit C Mos)
Pin
Name
1 P7
/AN
7
7
2 P7
/AN
6
6
3 P7
/AN
8-bit C MOS I/O port with the same function
5
5
4 P7
/AN
as ports P2
4
4
5 P7
/AN
C MOS compatible input level
3
3
6 P7
/AN
C MOS 3-state output
2
2
7 P7
/AN
1
1
8 P7
/AN
0
0
4-bit C MOS I/O port with the same
function as ports P2
9 PB
3
PB
/DA
C MOS compatible input level
2
10
C MOS 3-state output
11 P5
/S
/AN
7
RDY3
15
12 P5
/S
/AN
6
CLK3
14
13 P5
/S
/AN
5
OUT3
13
14 P5
/S
/AN
4
IN3
12
15 P5
/S
/AN
8-bit C MOS I/O port with the same function
3
RDY2
11
16 P5
/S
/AN
as ports P2
2
CLK2
10
17 P5
/S
/AN
C MOS compatible input level
1
OUT2
9
18 P5
/S
/AN
C MOS 3-state output
0
IN2
8
19 P6
/S
/CS/S
7
RDY1
CLK12
20 P6
/S
6
CLK11
21 P6
/S
5
OUT1
22 P6
/S
4
IN1
23 P6
/CNTR
3
1
24 P6
/CNTR
2
0
25 P6
/PWM
1
26 P6
0
6-bit C MOS I/O port with the same
function as ports P2
27 P4
/T3
7
OUT
P4
/T1
C MOS compatible input level
6
OUT
28
C MOS 3-state output
2-bit input port
29 P4
/INT
/ZCR
5
1
C MOS compatible input level
30 P4
/INT
6-bit C MOS I/O port with the same function
4
4
31 P4
/INT
as ports P2
3
3
32 P4
/INT
C MOS compatible input level
2
2
33 P4
C MOS 3-state output
1
2-bit input port
34 P4
/INT
0
0
C MOS compatible input level
35 RESET
Reset input pin for active "L"
4-bit C MOS I/O port with the same
function as ports P2
36 PB
/X
1
CIN
PB
/X
C MOS compatible input level
0
OUT
37
C MOS 3-state output
Input and output pins for the main clock
generating circuit.
Feedback resistor is built in between
XIN pin and Xout pin.
Connect a ceramic resonator or a
quartz-crystal oscillator between the X
pin and X
38 X
frequency.
IN
39 X
OUT
If an external clock is used, connect the
clock source to the X
X
OUT
This clock is used as the oscillating
source of system clock.
40 V
Apply voltage of 0V to V
SS
41 P2
4-bit I/O port
7
I/O direction register allows each pin to
42 P2
individually programmed as either input
6
or output.
43 P2
At reset this port is set to input mode.
5
44 P2
TTL input level
4
C MOS 3-state output
Function
- P2
4
7
- P2
4
7
- P2
4
7
- P2
4
7
- P2
4
7
- P2
4
7
pin to set oscillation
OUT
pin and leave the
IN
pin open.
S S
Pin
Name
45 P2
/DIG
3
19
46 P2
/DIG
2
18
47 P2
/DIG
1
17
48 P2
/DIG
0
16
49 P1
/DIG
7
15
50 P1
/DIG
6
14
51 P1
/DIG
5
13
52 P1
/DIG
4
12
53 P1
/DIG
3
11
54 P1
/DIG
2
10
55 P1
/SEG
/DIG
1
41
9
56 P1
/SEG
/DIG
0
40
8
57 P0
/SEG
/DIG
7
39
7
58 P0
/SEG
/DIG
6
38
6
59 P0
/SEG
/DIG
5
37
5
60 P0
/SEG
/DIG
4
36
4
61 P0
/SEG
/DIG
3
35
3
62 P0
/SEG
/DIG
2
34
2
63 P0
/SEG
/DIG
1
33
1
64 P0
/SEG
/DIG
0
32
0
65 P3
/SEG
7
31
66 P3
/SEG
6
30
67 P3
/SEG
5
29
68 P3
/SEG
4
28
69 P3
/SEG
3
27
70 P3
/SEG
2
26
71 P3
/SEG
1
25
72 P3
/SEG
0
24
73 P9
/SEG
7
23
74 P9
/SEG
6
22
75 P9
/SEG
5
21
76 P9
/SEG
4
20
77 P9
/SEG
3
19
78 P9
/SEG
2
18
79 P9
/SEG
1
17
80 P9
/SEG
0
16
81 P8
/SEG
7
15
82 P8
/SEG
6
14
83 P8
/SEG
5
13
84 P8
/SEG
4
12
85 P8
/SEG
3
11
86 P8
/SEG
2
10
87 P8
/SEG
1
9
88 P8
/SEG
0
8
89 PA
/SEG
7
7
90 PA
/SEG
6
6
91 V
CC
I N
92 PA
/SEG
5
5
93 PA
/SEG
4
4
94 PA
/SEG
3
3
95 PA
/SEG
2
2
96 PA
/SEG
1
1
97 PA
/SEG
0
0
98 V
EE
99 AV
SS
100
V
REF
- 65 -
Function
4-bit output port with the same function as port P0
8-bit output port with the same function as port P0
8-bit output port
This port builds in pull-down resistor between
port P0 and the V
pin
EE
At reset this port is set to V
EE
The high-breakdown-voltage P-channel open-
drain
8-bit output port with the same function as port P0
8-bit output port with the same function as port P0
8-bit I/O port with the same function as ports
P2
-P2
4
7
C MOS compatible input level
The high-breakdown-voltage P-channel open-
drain
Apply voltage of 4.0 to 5.5V to V
8-bit I/O port with the same function as ports
P2
-P2
4
7
C MOS compatible input level
The high-breakdown-voltage P-channel open-
drain
Applies voltage supplied to pull-down
resistors of ports P0, P1, P2
0
GND input pin for A-D converter and D-A converter
Connect AV
to V
SS
SS
Reference voltage input pin for A-D converter and
D-A converter
level
C C
-P2
, P3 and P9
3

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