Ic Pin Function Description - Sony XR-4890 Service Manual

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6-6. IC PIN FUNCTION DESCRIPTION

• IC501 MASTER U-COM (MN101C12GTA1/MN101C12GTB)
Pin No. Pin Name
1 AVREF-
2 VSM
3 KEYIN1
4 KEYIN0
5 DBAS IN
6 DSTSEL
7 FUNC-SEL
8 NCO
9 RCIN0
10 AVREF+
11 VDD
12 OSC OUT
13 OSC IN
14 GND
15 XT IN
16 XT OUT
17 GND
18 RCIN1
19 SYSRST
20 BUSON
21 UNISO
22 UNISI
23 UNICKO
24 UNICKI
25 NCO
26 KEYACK
27 NOSESW
28 BU_IN
29 SIRCS
30 TELMUT
31 TESTIN
32 RAMBU
33 RESET
34 VOLMUT
35 BEEP
36 AMPMUT
37 AMPON
38 PLLCKD
39 PLLCE
40 PLLSO
41 PLLSI
42 LCDSD
43 LCDCE
44 LCDCKD
45 VOLSO
46 NCO
47 VOLCKO
48 ACCIN
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 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
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
– 27 –
Function