ZS-X3CP - Sony Audio Service Manual (repair manual). Page 37

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37
ZS-X3CP
 CONTROL BOARD  IC801 
µ
PD784216AGF519-3BA (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
TU-CE
O
PLL chip enable signal output terminal
2
TU-DATA
O
PLL serial data output terminal
3
TU-CLK
O
PLL serial data transfer clock signal output terminal
4
TU-COUNT
I
PLL serial count data input terminal
5
TU-MUTE
O
Tuner muting on/off control signal output terminal    “L”: active
6
SIMUKE1
I
Destination setting terminal
7
SIMUKE2
I
Destination setting terminal
8
TEST-B
O
Not used
9
VDD
Power supply terminal (+3.2V)
10
TEST-A
I
CD automatic adjustment value check mode setting terminal    Normally fixed at “H”
11
EPROM-SCL
O
Serial clock signal output terminal to the EEPROM
12
EPROM-SDA
I/O
Two-way serial data bus with the EEPROM
13 to18
N.C
O
Not used
19
LCD-RESET
O
LCD system reset signal output terminal   “L”: reset
20
LCD-RS
O
LCD drive signal output terminal
21
LCD-E
O
LCD drive signal output terminal
22
TEST/VPP
I
Not used
23
N.C
O
Not used
24
VM-CONT
O
Middle voltage (+4.5V) detection signal output for battery check
25
CD-ON
O
CD power on/off control signal output terminal    “L”: CD on
26
LOAD
O
Load control signal output for battery level check
27
TU-ON
O
Tuner power on/off control signal output terminal    “L”: tuner on
28
MP3-LED
O
MP3 LED drive signal output terminal    “L”: active
29 to 36
DB0 to DB7
O
LCD drive signal output terminal
37
VDD
Power supply terminal (+3.2V)
38
X2
O
System clock output terminal (5MHz)
39
X1
I
System clock input terminal (5MHz)
40
VSS
Ground terminal
41
XT2
O
Not used
42
XT1
I
Not used
43
RESET
I
System reset signal input terminal   “L”: reset
44
FM/AM-SHIFT
O
Shift point terminal for oscillation frequency change
45
N.C
O
Not used
46
PWR-KEY
I
POWER key input terminal     “L”: POWER key on
47
CD-DOOR
I
CD lid open/close detection switch input terminal   “L”: CD lid is close
48
N.C
O
Not used
49
MP3-INTB
I
Interrupt request signal input terminal   “L”: active
50
CD-WRQ
I
CD interruption signal input terminal
51
AVDD
Ground terminal
52
AVREF0
Not used
53
KEY2
I
Key input terminal (A/D input)
54
KEY1
I
Key input terminal (A/D input)
55
VH
I
High voltage (+9V) detection signal input for battery check
56
REG-CHK
I
REG-CHK detection signal input terminal
57
VM
I
Middle voltage (+4.5V) detection input for battery check
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