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Ic Pin Function Description - Sony XR-4900 Service Manual

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6-6. IC PIN FUNCTION DESCRIPTION

• IC501 MASTER U-COM (MN101C12GTB1)
Pin No.
Pin Name
1
VREF-
2
VSM
3
KEYIN1
4
KEYIN0
5
DBASS IN
6
DSTSEL
7
FUNC-SEL
8
NCO
9
RC-IN0
10
VREF+
11
VDD
12
OSC2
13
OSC1
14
VSS
15
XI
16
XO
17
MMOD GND
18
RC-IN1
19
SYSRST
20
BUSON
21
UNISO
TE
L 13942296513
22
UNISI
23
UNICKO
24
UNICKI
25
NCO
26
KEYACK
27
NOSESW
28
BU-IN
29
SIRCS
30
TELMUT
31
TEST-IN
32
RAMBU
33
RESET
34
VOL-MUT
35
BEEP
36
AMPMUT
37
AMPON
38
PLL-CKO
39
PLL-CE
40
PLL-SO
41
PLL-SI
42
LCD-SD
43
LCD-CE
www
44
LCD-CKO
45
VOL-SIO
46
NCO
.
47
VOL-CKD
48
ACCIN
49
MUT
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I/O
Basic voltage (- side) of AD conversion input
I
FM/AM common signal meter A/D conversion input terminal
I
KEY (AD conversion) input
I
I
Position detecting AD input terminal of D-BASS
I
Terminal for setting to select the value of destination
I
Function selecting (AD conversion) input
I
Not used
I
Rotary commander (AD conversion) input
I
Basic voltage (+side) of AD conversion input
Power supply
Radiator (18.432 MHz) connecting terminal
Ground
Sub clock (for clock) radiator (32.768 kHz) connecting terminal
Ground
I
Rotary commander shift input
O
SYSTEM RESET control output
O
BUS ON control output
O
Serial data output
I
Serial data input
O
Serial clock output
I
Serial clock input
O
Not used
I
Key input acknowledge
I
Removing/attaching front panel detection input
I
BACK-UP detection input terminal
I
Remote control input
I
TELEPHONE MUTE detection input
I
Test mode setting input terminal
I
Reset detection input of RAM
I
Reset input terminal
O
Not used
O
Control output for buzzer
O
Power amplifier mute control output terminal
O
Power amplifier STANDBY control terminal
O
PLL CLK output terminal
O
PLL CE output terminal
O
PLL DATA output terminal
I
PLL DATA input terminal
O
LCD serial data output
O
LCD chip enable output terminal
O
LCD serial clock output
x
ao
u163
y
O
Electrical volume serial data output
i
O
Not used
O
Electrical volume serial data output
I
Accessory power supply detection input
O
System MUTE control output
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2 9
8
Function
Q Q
3
6 7
1 3
1 5
co
.
– 31 –
9 4
2 8
0 5
8
2 9
9 4
2 8
m
9 9
9 9

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