Aiwa HS-TX694 Service Manual page 11

IC, TC9318FB-027RF
Pin No. Pin Name
1 ~ 3 COM1 ~ COM3
4 ~ 22 S1 ~ S19
23 ~ 26 S20 ~ S23
27 ~ 30 K0 ~ K3
31 ~ 34 T0 ~ T3
35 FM/AM
36,37 MSP/S-BASS
38 TV OUT
39,40 DES
41 TAPE
42 POWER CHECK
43 REMOTE
44 POWER SW
45 HOLD
46 BUZZER
47 MUTE
48 TEST
49 WAKE UP
50 IF IN
51 TU OUT
52 PLL OUT
53 GND
54 FM IN
55 AM IN
56 VDD
57 RESET
58 XOUT
59 XIN
60 VXT
61 VLCD
62, 63 C1,C2
64 VEE
I/O
O LCD common output.
O LCD segment output.
- Not used.
I Key matrix input.
O Key return timing output.
O 'H': FM/TV/Weather,'L':AM
O These two output ports are used for MSP switching and Super-Bass On/Off.
O 'H': TV or Weather band (Not used).
H
I These two ports combined with K0 ~ K3 determine the destination.
I 'H': Tape ON, 'L': Tape OFF.
I A/D in for power supply voltage level.
I A/D in for remote controller.
O 'H': Power OFF, 'L': Power ON.
I 'H': Hold OFF, 'L': Hold ON.
O Buzzer output.
O Mute output.
- Microcontroller test terminal (Not used).
I Wake up the system from memory back-up mode.
I IF frequency input.
O 'L': Tuner ON.
O Phase comparison output.
- GND.
I FM oscillator signal input.
I AM oscillator signal input.
- Supply voltage terminal.
I System reset input.
Crystal oscillator pin.
I/O
- Power supply for crystal oscillator.
- Reference voltage for LCD driver (Not connected).
Voltage doubler boosting.
- Constant 1.5V for LCD driver.
Description