Sony CDX-M620 Service Manual page 32

CDX-M620/M670
• IC702 HD643255A36F (SUB SYSTEM CONTROL) (MAIN BOARD)
Pin No. Pin Name
1 SA CLK
2 PG4
3 VSS
4 NC
5 VCC
6 – 9 PC0 – PC3
10 VSS
11 – 14 PC4 – PC7
15 – 18 PB0 – PB3
19 VSS
20 – 23 PB4 – PB7
24 – 27 PA0 – PA3
28 VSS
29 – 31 PA4 – PA6
32 SA EN IN
33 SPE LAT
34 BU IN
35, 36 VSS
37 P65
38 BUS ON
39 VCC
40 – 43 PE0 – PE3
44 VSS
45 DSP SEL
46 LED SW1
47 LED SW2
48 PE7
49 BU IN
50 LINK OFF
51 PD2
52 ILL ON
53 VSS
54 – 56 PD4 – PD6
57 BOOT
58 VCC
59 P30
60 LCD SO/TX
61 SP SI
62 RX
63 SP CKI
64 LCD CKO
65 VSS
66 LCD CEO
67, 68 VSS
69 LCD INH
70 LCD CE1
71 LCD CE2
72 – 78 P27 – P21
79 FL W
80 FW E
81 SYS RST
82 NMI
32
I/O
O Not used. (Open)
O Not used. (Open)
— Ground
— Not used. (Open)
— Power supply pin (+ 5V)
O Not used. (Open)
— Ground
O Not used. (Open)
O Not used. (Open)
— Ground
O Not used. (Open)
O Not used. (Open)
— Ground
O Not used. (Open)
I Connecting to ground in this set.
I Spectrum analyzer data latch signal
I Back-up power detection signal
— Ground
O Not used. (Open)
I BUS ON signal
— Power supply pin (+5 V)
O Not used. (Open)
— Ground
I Spectrum analyzer data select signal
I Illumination select control signal 1
I Illumination select control signal 2
O Not used. (Open)
O Not used. (Open)
O Link OFF control signal
O Not used. (Open)
O Illumination power control signal
— Ground
O Not used. (Open)
I Display CPU write-in control signal
— Power supply pin (+5 V)
O Not used. (Open)
O LCD driver serial data output
I Spectrum analyzer data input
I Flash CPU write-in data input
I Spectrum analyzer clock input
O LCD driver serial clock output
— Ground
O LCD driver chip enable output
— Ground
O LCD driver inhibit control signal
O LCD driver chip enable output
O LCD driver chip enable output
O Not used. (Open)
O Flash write control signal
I Flash write enable signal
I System reset signal
I Non maskable interrupt signal
Pin Description