Sony ICD-57 Service Manual page 12

• IC701 (SYSTEM CONTROLLER)
Pin No. Pin Name
1 KEY0
2 KEY1
3 SPDSW
4 XHOLD
5 LMUTE
6 MICSEL
7 XFMCE
8 VDD0
9 AVREF
10 XFMWE
11 XFMALE
12 VSS1
13 XFMBSY
14 XFMCLE
15 DSPMCK
16 DSPSSN
17 XFMRE
18 NC
19 XFMWP
20 XFMSE
21 BEEP
22 PLLCRL
23 to 26 COM0 to COM3
27 BIAS
28 to 30 VLC0 to VLC2
31 VSS0
32 to 61 S0 to S29
62 NC
63 APOWER
64 XTEST
65 DSPSTP
66 LEDREC
67 LEDPB
68 AMPPOW
69 XSPOWER
70 RTCCE
71 DSPRST
µPD780308GC-A30-8EU (ICD-37)
I/O
Key input terminal (A/D input) S701 to S705 (STOP, REC START/STOP, Nx PLAY/STOP
I
(EXECUTE), – . (SELECT), > + (SELECT) ) keys input
I
Key input terminal (A/D input) S707 to S709 (MENU, FILE, ERASE) keys input
PLAY SPEED select switch (S712) input terminal (A/D input)
I
"L": SLOW, "M": FAST, "H": NORMAL
I HOLD switch (S711) input terminal "L": HOLD ON, "H": HOLD OFF
O
Line muting control signal output terminal "H": line muting on
Microphone sensitivity select signal output terminal
O
"L": mic sensitivity low, "H": mic sensitivity high
O
Chip enable signal output to the flash memory (IC702) "L" active
—
Power supply terminal (+3.3V)
I Reference voltage input terminal (for A/D converter)
O
Write enable signal output to the flash memory (IC702) "L" active
O
Address latch enable signal output to the flash memory (IC702) "L" active
— Ground terminal
I
Ready/busy detection signal input from the flash memory (IC702) "L" active
O
Command latch enable signal output to the flash memory (IC702) "L" active
O
Sampling frequency sync signal output to the digital signal processor (IC104) "H" active
O Transmission status output to the digital signal processor (IC104) "L" active
O
Read enable signal output to the flash memory (IC702) "L" active
—
Not used (open)
O Write protect signal output to the flash memory (IC702) "L" active
O
Spare space enable signal output to the flash memory (IC702) "L" active
O
Beep sound drive signal output terminal (2.4 kHz) "H" active
Serial data transfer clock signal output to the divider (IC106)
O
Power on/off control signal output for the ADPCM (IC101), digital signal processor (IC104),
divider (IC106) and LED power supply "H": power on
O
Common drive signal output to the liquid crystal display (ND701) "H" active
O Power supply output terminal for the liquid crystal display (ND701) "H" active
I
Power supply input terminal for the liquid crystal display (ND701) "H" active
—
Ground terminal
O
Segment drive signal output to the liquid crystal display (ND701) "H" active
—
Not used (open)
Power on/off control signal output for the mic amplifier (IC103) and AGC (IC107)
O
"H": power on (rec mode)
I
Setting terminal for the test mode "L": test mode (Normally: fixed at "H")
O
Stop signal output to the digital signal processor (IC104) "L" active
O
LED drive signal output of the REC indicator (D504 red) "H": LED on (rec mode)
O
LED drive signal output of the PLAY indicator (D504 green) "H": LED on (play mode)
Power on/off control signal output to the power amplifier (IC102)
O
"H": power on (play mode)
Power on/off control signal output for analog power supply to the DC/DC converter circuit
O
"L": power on
O
Chip enable signal output to the real time clock (IC703) "H" active
Reset signal and power down detection signal output to the digital signal processor (IC104)
O
"H": reset or power down
µPD780308GC-A31-8EU (ICD-57/67)
Description
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