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Sony MZ-R37 Service Manual page 22

Portable minidisc recorder
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• IC801 CXP740010 (SYSTEM CONTROL)
Pin No.
Pin name
1
CLKCS
2
XRST
3
WRPWR
4
TX
5
SDI2
6
SDO2
7
SCK2
8
RFSW
9
SSB
10
SSB SCK
11
DTCK
12
SPCK
13
WP
14
OPEN
15
CLOCK
16
NI MH CHG
17
SLEEP
18
T.MARK
19
REC
20
PROTECT
21
HOLD
22
SYNC REC
23
D. B. B
24
XLINEDET
25
INMU1
26
XTEST
27
XDCIN
28
KANA SE L
29
XPHOTO SW
30
XP CONT
31
X2VCONT
32
XREC LED
33
MODE2
34
MODE1
35
XNIMH CHG
36
XLCD ON
37
INMU0
38
MRST
39
V
SS
40
XTAL
41
EXTAL
42
LCD DS
43
LCD XC D
44
LCD DATA
45
LCD SCK
46
CHG MNT
47
INLS
48
HIDC MNT
49
KEY R
I/O
O
Not used (Chip select output to real time clock).
O
Reset output. L : Reset
O
Laser power switching signal output.
O
Write data transfer timing output.
I
Serial data input.
O
Serial data output.
O
Serial clock output.
O
Power control output.
I/O
SSB data signal input and output.
I/O
SSB clock signal input and output. (Not used (Open).)
I/O
Remote control data signal input/output.
—
Not used (Open).
I
Wake-up signal input from remote control key and this unit key.
I
Detecting switch for opening and closing of the upper cover. L : Close
I
Not used (CLOCK SET switch input).
O
NI MH charge control output.
O
Sleep signal output.
I
T.MARK (Track mark) switch input.
I
Not used (REC switch input).
I
Disc write protect switch. H : Protect
I
HOLD switch input (This unit). L : HOLD
I
SYNCHRO REC switch input.
I
DIGITAL MEGA BASS slide switch input.
I
LINE IN (OPTICAL) detection input. L : LINE IN
O
INMU signal output.
I
Test mode terminal. L : Test mode
I
Not used (Open). (DC input detect. L : DC IN)
—
Not used (Open).
O
ON/OFF control signal output of PHOTO circuit.
—
Not used (Open). (Power control output. L : ON)
Not used (Open). (Outputs H while operating with a lithium battery. 2V power control
—
signal output. L : ON)
—
Not used (Open). (REC LED control. L : ON)
O
REC drive (IC901) control signal output.
O
—
Not used (Open). (Battery charger control signal output. L : Charge)
O
LCD ON/OFF control. L : ON
O
INMU signal output.
I
Microprocessor reset input.
—
Ground.
—
System clock (12 MHz).
—
System clock (12 MHz).
O
LCD communication strobe signal output to LCD driver.
O
Com/data select signal output.
O
LCD data output.
O
Serial clock output.
I
Battery charge voltage minitor input.
I
Detecting switch for internal circuit of sleding. L : Internal circuit
I
Voltage monitor DC input.
I
Remote control key input.
– 22 –
Pin Description
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