61
MDS-SE9
7-15. IC PIN FUNCTION DESCRIPTION
• IC151 M38514M6-C12FP SYSTEM CONTROLLER (MAIN Board)
Pin No.
Pin Name
I/O
Description
1
VCC
–
Power supply terminal
2
VREF
–
Reference voltage input terminal
3
AVSS
–
Ground terminal (analog)
4
4052A
O
Selection signal input to the selector (IC401)
5
4052B
O
Selection signal input to the selector (IC401)
6
P.DOWN
I
AC cut detection signal input (“L” : AC cut, “H” : normal)
7
P41
–
Terminal for flash program
8
PDOWN-OUT
O
MD power supply control signal output
9
SRDY1
O
Terminal for flash program
10
SCLK1
I
Terminal for flash program
11
TXD
O
Terminal for flash program
12
RXD
I
Terminal for flash program
13
I2C-CLK
I/O
IIC communication clock
14
I2C-DATA
I/O
IIC communication data
15
CNVSS
–
Terminal for flash program
16
BIAS
O
Bias on/off signal output
17
+MTR
O
Capstan motor signal output
18
RESET
I
Reset signal input (“L” : active)
19
XIN
O
Main clock input (8MHz)
20
XOUT
O
Main clock output (8MHz)
21
VSS
–
Ground terminal
22
TP151
O
Not used (open)
23
REC LED
O
Terminal for checking
24
PAUSE LED
O
Terminal for checking
25
FWD LED
O
Terminal for checking
26
REV LED
O
Terminal for checking
27
TC-RELAY
O
Recording/playback control signal output
28
PLAY SW
I
TC PLAY switch signal output
29
+SOL
O
TC solenoid control signal output
30
TP152
O
Not used (open)
31
REC MUTE
O
TC record muting signal output
32
TC-MUTE
O
TC line muting signal output
33
ALC
O
ALC signal output (“L” : ON, “H” : OFF)
34
LOAD IN SW
I
Tape load in switch signal input
35
LOAD OUT SW
I
Tape load out switch signal input
36
LOAD IN
O
Tape loading motor control signal output
37
LOAD OUT
O
Tape loading motor control signal output
38
END SW
I
TC END switch signal input
39
B-HALF
I
TC switch (F REC, R REC) signal input
40
KEY2
I
Function key input
41
KEY1
I
Function key input
42
KEY0
I
Function key input
