Sony PMC-MD55 - Md Boombox, Руководство по обслуживанию

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– 116 –
Pin No. Pin Name I/O Description
48 +3.3V
— Power supply terminal (+3.3V)
49 SNG/CHG
— Not used (fixed at “L”)
50, 51 JOG1, JOG0 I
JOG dial pulse input Not used (fixed at “L”)
52 SDA I/O Two-way data bus with the EEPROM (IC171)
53 SCL O Clock signal output to the EEPROM (IC171)
54 2M/4M I
Select whether D-RAM capacitance 2M bit or 4M bit “L”: 4M bit (external D-RAM),
“H”: 2M bit (internal D-RAM of IC121 CXD2654R) (fixed at “H” in this set)
55, 56 NC — Not used (fixed at “L”)
57 RXD (UART) I UART communication data input from the system controller (IC405)
58 TXD (UART) O UART communication data output to the system controller (IC405)
59 RTS I RTS (Request To Send) input from the system controller (IC405)
60 CTS O CTS (Clear To Send) output to the system controller (IC405)
61, 62 AUBIT0, AUBIT1 — Not used (fixed at “L”)
63, 64
CLKSET0,
CLKSET1
I Clock destination setting terminal (fixed at “L”)
65 GND — Ground terminal
66 +3.3V — Power supply terminal (+3.3V)
67 SCLK O Serial clock signal output to the CXD2654R (IC121)
68 SWDT O Writing data output to the CXD2654R (IC121)
69 SRDT I Reading data input from the CXD2654R (IC121)
70 EMP O Emphasis control signal output to the A/D, D/A converter (IC603) when recording mode
71 SCK1 O Display serial clock signal output terminal Not used (open)
72 SOUT1 O Display serial data output terminal Not used (open)
73 SIN1 O Chip select signal output for the display Not used (open)
74 CSB I Not used (fixed at “H”)
75 LDON O Laser diode on/off control signal output to the automatic power control circuit “H”: laser on
76 PIT/GRV O
Pit/groove detection signal output terminal
“H”: is output for the playback only disc or TOC area Not used (open)
77 FOK I
Focus OK signal input from the CXD2654R (IC121)
“H” is input when focus is on (“L”: NG)
78 NC
— Not used (open)
79 LOCK O
Lock signal output terminal Not used (open)
80 WRPWR O
Laser power select signal output to the CXD2654R (IC121) and HF module switch circuit
“L”: playback mode, “H”: recording mode
81 DIG-RST O
Reset signal output to the CXD2654R (IC121) and BH6511FS (IC152) “L”: reset
82 NC
— Not used (open)
83 DA-RST O
Reset signal output to the A/D, D/A converter (IC603) “L”: reset
84 DSEL-A
— Not used (open)
85 DSEL-B
— Not used (open)
86 MOD O
Laser modulation select signal output to the HF module switch circuit
Stop: “L”, Playback power: “H”,
Recording power:
2 sec
0.5 sec