Ic Pin Function Description - Sony XR-4880 Service Manual

6-6. IC PIN FUNCTION DESCRIPTION

• IC501 MASTER U-COM (MN101C12GTC1)
Pin No. Pin Name
1 VREF-
2 VSM
3 KEYIN1
4 KEYIN0
5 DBASS IN
6 DSTSEL
7 FUNC-SEL
8 –
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
22 UNISI
23 UNICKO
24 UNICKI
25 –
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-CKD
39 PLL-CE
40 PLL-SO
41 PLL-SI
42 LCD-SO
43 LCD-CE
44 LCD-CKO
45 VOL-SIO
46 –
47 VOL-CKD
48 ACC-IN
49 MUT
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
O 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 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 Electrical volume mute control output
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
O Electrical volume serial data output
O Not used
O Electrical volume serial data output
I Accessory power supply detection input
O System MUTE control output
– 29 –
Function