Sony HCD-MD5 - Page 59

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Digital Board IC201 M37610MD-068FP (System Control, Mechanism Controller (MD))
Pin No. Pin Name I/O Function
1 C, SET 1 I
Emphasis ON/OFF select. “H”: ON. It is inverted by the emphasis control Q201 of IC303 and the
inverted signal is input to the IC303.
2 C, SET 0 I
3 KEY 3 I
Not used (Connected to ground).
4 KEY 2 I
5 KEY 1 I Not used (Connected to VREF).
6 KEY0 I
7 — I Not used (Fixed at “L”).
8 XINT I Interrupt status input from the CXA2536CR (IC271).
9 SENS I Internal status (SENSE) input from the CXA2535BR (IC121).
10 SHCK I Track jump signal input from the CXA2536CR (IC271).
11 AUBK I Not used (Fixed at “L”).
12 S/A O Not used (Open).
13 BEEP SW I Not used (Connected to ground).
14 REC/OTHER O When recording: “L”, Other: “H”
15 BEEP O Not used (Open).
16 F. BIAS/C2 I Not used (Connected to ground).
17 GND (CNVSS) — Ground
18
SYSTEM RST I
System reset signal input “L” is input for several hundreds msec. after the power is turned on, and
changed to “H”.
19 XIN T I
20 XOUT T O
Not used (Connected to ground).
21 GND — Ground
22 XIN I Clock input (8 MHz)
23 XOUT O Clock output (8 MHz)
24 +5V — Power supply (+5 V)
25 STB O Strobe signal output to the power supply circuit. The power supply ON: “H”, Stand by: “L”.
26 MIC SW I
Not used (Connected to ground).
27 MIC SW I
28 BUS OUT O Not used (Open).
29 — O
30 LED2 O
Not used (Connected to ground).
31 LED1 O Not used (Fixed at “L”).
32 LED0 O Not used (Open).
33 C1 I
34 ADER I
Not used (Connected to ground).
35 NC I Not used (Fixed at “L”).
36 MASTER/SLAVE I
37 JOG 1 I Not used (Connected to ground).
38 JOG 0 I
39 SDA I/O Data signal input/output with the backup memory (IC171).
40 SCL O Clock signal output to the backup memory (IC171).
41 POWER DOWN I Power down detect input. Normally, “H” is input.
42 REMCOM I Not used (Fixed at “H”).