Aiwa AV-D78 Service Manual page 28

IC DESCRIPTION
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IC, UPD780228GF-083
3 7 63 1515 0
Pin No. Pin Name
1 O-K-SCAN
2 TUNER ON
3 O-DATA(M)
4 C
5 O-STB(M)
6 O-MUTE
7 O-CLK(M)
8 I-TM-BASE
9 O-POWER
10 O-5VMRESET
11 O-5VDSP/RESET
12 I-MIC
13 O-5VDSP/CSN
14 O-5VMOSI
O-2VMISO(MISO)/
15
SUR-MUTE
16 O-5VSCK/C-MUTE
17 IC
18 VSS
TE 19 VDD
L 13942296513
20 O-2VINTRQ
21 O-CLK-SW
22 I-RDS-DATA
23 O-5VMISO
24 A
25 O-MCU/B
26 O-8415CSN
27 O-4228CSN
28 I-RDS-CLK
29 RERR
30 RESET
31 O-PLL-CE
32 O-TAPE-ATT
33 O-STB(MIC)
34 I-RMC
35 O-STB(T92)
36 C-SHIFT
37 VDD1
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38,39 X2,X1
40 VSS1
.
41 AVDD
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I/O
O Switch scan timing output.
O Tuner ON/OFF output.
O Data output for sound.
- Connected to a pulled up resistor.
O Latch strobe output for sound control.
O System mute ON/OFF output.
O Clock output.
I Time-base signal input.
O System power supply ON/OFF output.
O Reset output for IC, CS8415A.
O Reset output for IC, CS49326.
- Connected to a pulled up resistor.
O Chip select output for IC, CS49326.
O Serial control data for IC, CS4228A.
O Serial control data output for IC, CS49326.
O Clock serial control output for IC, CS4228A.
- Connected to GND.
- GND.
I Power supply input (+5V).
O Control port interrupt request output for IC, CS49326.
O Pre-emphasis output for IC, CS8415A.
I RDS serial data input. (Not used)
O Serial control data output for IC, CS8415A.
- Connected to a pulled up resistor.
- Connected to a pulled up resistor.
O Chip select output for IC, CS8415A.
O Chip select output for IC, CS4228A.
I RDS clock input. (Not used)
O Receiver error output for IC, CS8415A.
I Reset input.
O PLL IC chip enable output for IC, LC72131D-N.
O ATT output for function tape.
- Not used.
I System remote control signal input.
- Connected to a pulled down resistor.
O Micon clock shift output.
I Power supply input (+5V).
- 4.19 MHz oscillator circuit.
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- GND.
i
I Power supply input (+4.9V).
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8
Description
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