Ic Description - Aiwa AV-D77 Service Manual

IC DESCRIPTION

U: IC, UPD780228GF-066,
Pin No. Pin Name
1 O-K-SCAN
2 O-PLL-CE
3 O-DATA(M)
4 I-TUNE/IFC
5 O-STB(M)
6 O-MUTE
7 O-CLK(M)
8 O-OSD-CE
9 O-POWER
10 O-DSP-CE
11 O-STB-31
12 I-TM-BASE
13 O-TC4094-CE
14 O-A45-CS
15 O-A45-DATA
16 O-A45-CLK
17 IC
18 VSS
19 VDD
20 O-Y917-RST
21 O-Y917-CS
22 O-Y902-SCK
23 O-Y902-SI
24 I-Y902-SO
25 O-Y902-CS
26 O-Y902-CSB
27 O-A45-PDN
28 I-RDS-CLK
29 I-RDS-DATA
30 RESET
31 O-CONT1
32 O-CONT2
33 OSD-CLK
34 I-RMC
35 OSD-DATA
36 C-SHIFT
37 VDD1
38, 39 X2, X1
40 VSS1
41 AVDD
42 HOLD
43 I-RE-VOL
EZ: IC, UPD780228GF-071
I/O
O Switch scan timing output.
O PLL IC chip enable output.
O Data output for sound.
I TUNE-IF count serial data input.
O Latch strobe output for sound CTRL.
O System mute ON/OFF output.
O Clock output.
- Not used.
O System power supply ON/OFF output.
- Not used.
O GEQ IC chip enable output.
I Reference clock input for timer watch.
O Shift register chip enable output.
O AK4527 chip select.
O AK4527 control data.
O AK4527 control data clock.
- Connected to GND.
- GND.
- Power supply input.
O YSD917 initial clear output.
O YSD917 chip select output.
O YSS902 & YSD917 bit clock output.
O YSS902 data output.
I YSS902 data input.
O YSS902 chip select output.
O YSS902 sub DSP chip select output.
- Not used.
I RDS clock input. (EZ only)
I RDS serial data input. (EZ only)
I Reset input.
O Master VOL CTRL output for surround left & right.
O Master VOL CTRL output for center & sub woofer.
- Not used.
I System remote control signal input.
- Not used.
O Micon clock shift output.
- Power supply input.
- 4.19 MHz oscillator circuit.
- GND.
- Power supply input.
I Power failure detected input "L" to stop and hold memory.
I Rotary encoder signal input (Main vol L & R).
Description
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