Sony ICF-SW77 Service Manual page 28

ICF-SW77
IC802(SUB MICRO COMPUTER)
M37450M8
Pin No. Port Name
I/O
Signal Name
Description
1 NC
_
NC
NOT CONNECTED
2 P31
0
NC
NOT CONNECTED
3 EV1
0
BEEP
BEEP SIGNAL OUTPUT
4
P57 I
BUSY
LCD802-1 CONTROL DRIVER IC805 ACTIVATING SIGNAL INPUT
5
P56
0 CS
SELECT SIGNAL OUTPUT TO LCD802-1 CONTROL DRIVER IC805
6 P55
0 C/D
DATA/CONTROL SELECT SIGNAL OUTPUT TO CONTROL DRIVER IC805
7
P54
0
SI
DATA SIGNAL OUTPUT TO CONTROL DRIVER IC805
8
P53
0 CLK
CLOCK SIGNAL OUTPUT TO CONTROL DRIVER IC805
9 P52
0
RES
RESET SIGNAL OUTPUT TO CONTROL DRIVER IC805
10
P51 I
CONNECTED TO GROUND
11
P50
I
CONNECTED TO GROUND
12
P67
CONNECTED TO GROUND
13 P66
I
CONNECTED TO GROUND
14 P65
I
CONNECTED TO GROUND
15 P64
I
CONNECTED TO GROUND
16 P63
I
CONNECTED TO GROUND
17 P62
I
CONNECTED TO GROUND
18
P61 I
CONNECTED TO GROUND
19
INI 1
I INTI
SERIAL START SIGNAL INPUT. COMMUNICATE WITH IC801
WR
0 WR
NOT CONNECTED
BE
0
RD
NOT CONNECTED
0 R/W
NOT CONNECTED
MM
0 SYNC
NOT CONNECTED
24
|
0 RESO
IMOT CONNECTED
25 CNVSS
-
CONNECTED TO GROUND
26
I RESET
RESET INPUT
NC
NC
NOT CONNECTED
XI
I XI
CONNECTED TO CRYSTAL OSCILLATOR (X803)
29
XO I
XO
CONNECTED TO CRYSTAL OSCILLATOR (X803)
30
NC -
NC
NOT CONNECTED
31
<t>
0
E
NOT CONNECTED
32
vss
-
CONNECTED TO GROUND
33 P27
I
CONNECTED TO GROUND
34
P26 I
SLOCK
ON DETECTION MODE "SYNC" AND TERMINAL IS "HIGH", INDICATES "SLOCK"
35
P25 I
SD1
ON SCAN, STATION SIGNAL INPUT
36 P24
0 WAKE
"POWER ON" OF IC802 POWER SIGNAL OUTPUT ON "HIGH", ACTIVATING
POWER IS ON.
37 P23
0 MUTE
MUTE SIGNAL OUTPUT. HIGH: MUTE
38 P22
0
POWER
RADIO POWER SUPPLY OUTPUT. HIGH: RADIO ON
39 P21
I/O
SDL
INPUT/OUTPUT FOR E*PROM DATA READ/WRITE
40 P20
0 SCL
CLOCK OUTPUT FOR ETROM DATA READ/WRITE
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