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