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4-4.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC701
µ
PD78P0308GC (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Function
1
KEY0
I
Key input terminal (A/D input) S701 to S705 (STOP, REC START/STOP, PLAY/STOP
(EXECUTE), –
(EXECUTE), –
= (SELECT), + + (SELECT) ) keys input
2
KEY1
I
Key input terminal (A/D input)
S706 to S710 (FILE, MENU, PRIORITY, ERASE, INDEX) keys input
S706 to S710 (FILE, MENU, PRIORITY, ERASE, INDEX) keys input
3
SPDSW
I
PLAY SPEED select switch (S712) input terminal (A/D input)
“L”: SLOW, “M”: NORMAL, “H”: FAST
“L”: SLOW, “M”: NORMAL, “H”: FAST
4
XHOLD
I
HOLD switch (S711) input terminal “L”: HOLD ON, “H”: HOLD OFF
5
LMUTE
O
Line muting control signal output terminal “H”: line muting on
6
MICSEL
O
Microphone sensitivity select signal output terminal
“L”: mic sensitivity high, “H”: mic sensitivity low
“L”: mic sensitivity high, “H”: mic sensitivity low
7
XFMCE
O
Chip enable signal output to the flash memory (IC702) “L” active
8
VDD
—
Power supply terminal (+3.3V)
9
AVREF
I
Reference voltage input terminal (for A/D converter)
10
XFMWE
O
Write enable signal output to the flash memory (IC702) “L” active
11
XFMALE
O
Address latch enable signal output to the flash memory (IC702) “L” active
12
VSS1
—
Ground terminal
13
XFMBSY
I
Ready/busy detection signal input from the flash memory (IC702) “L” active
14
XFMCLE
O
Command latch enable signal output to the flash memory (IC702) “L” active
15
SYNCOUT
O
FS sync signal output to the MSM7590L (IC101)
16
SYNCMSK
O
X (R) sync control signal output to the MSM7590L (IC101)
17
XFMRE
O
Read enable signal output to the flash memory (IC702) “L” active
18
MSKCLK
I
Clock signal input for the X (R) sync output control
19
XFMWP
O
Write protect signal output to the flash memory (IC702) “L” active
20
XFMSE
O
Spare space enable signal output to the flash memory (IC702) “L” active
21
BEEP
O
Beep sound drive signal output terminal (2.4 kHz)
22
LIGHT
O
LED drive signal output of the LCD back light LED (D503) “H”: LED on (back light on)
23 to 26
COM0 to COM3
O
Common drive signal output to the liquid crystal display (ND701)
27
BIAS
O
Power supply output terminal for the liquid crystal display
28 to 30
VLC0 to VLC2
I
Power supply input terminal for the liquid crystal display
31
VSS0
—
Ground terminal
32 to 61
S0 to S29
O
Segment drive signal output to the liquid crystal display (ND701)
62
—
O
Not used (open)
63
XSERV
I
Setting terminal for the service mode Not used (open)
64
TEST
I
Setting terminal for the test mode “L”: test mode (Normally: fixed at “H”)
65
XDSPDEN
O
DSP control interface enable signal output to the MSM7590L (IC101)
66
LEDREC
O
LED drive signal output of the REC indicator (D504 red) “H”: LED on (rec mode)
67
LEDPLY
O
LED drive signal output of the PLAY indicator (D504 green) “H”: LED on (play mode)
68
AMPPO
O
Power on/off control signal output to the power amplifier (IC102)
“H”: power on (play mode)
“H”: power on (play mode)
69
XSPOWER
O
Power on/off control signal output for the MSM7590L (IC101) and LED power supply
“L”: power on
“L”: power on
70
RTCCE
O
Chip enable signal output to the RS5C348A (IC703) “H” active
71
XPDRST
O
Reset signal and power down detection signal output to the MSM7590L (IC101)
“L”: reset or power down
“L”: reset or power down
72
DSPIS
I
Recording serial data input from the MSM7590L (IC101)
73
DSPIR
O
Playback serial data output to the MSM7590L (IC101)
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