Kenwood VR-505 Service Manual page 5

3-2 Pin Description of Microprocessor
Pin No. Pin Name
1 VREF
2 TH SENS
3 PROT1
4 PROT2
5 S LEVEL
6 KEY GET
7 CE2
8 CE1
9 DIG DET
10 VREF
11 VDD
12 OSC2
13 OSC1
14 VSS
15 XI
16 XO
17 MMCD
18 DIR/CODEC DIN
19 DIR/CODEC DOUT
20 DIR/CODEC CLK
21 DSP DIN
22 DSP DOUT
23 DSP CLK
24 DSP CE1
25 DSP CE2
26 REM I
27 REM 0
28 DIR ERR
29 RDS CLK
30 DPS IRQ1
31 DPS IRQ2
32 NC
33 RESET
34 DSP PD1
35 DSP PD2
36 DIR PD
37 CODEC PD
38 CODEC CLIP
39 CODEC CE
40 RDS DIN
41 NC
42 FL DIN
43 FL DOUT
44 FL CLK
45 FL CE
VR-505/506/507/509/510/517
CIRCUIT DESCRIPTION
I/O
- Connected to ground.
I Protection signal detection port for thermal sensor.
I Protection signal detection port for over current.
I Protection signal detection port for over voltage.
- Detection port of RDS signal level.
I A/D key input for band and standby.
I Detection port of chip enable 2 for microprocessor.
I Detection port of chip enable 1 for microprocessor.
I Detection port of digital signal for DTS.
- A/D reference voltage.
- Power supply(+5v) for microprocessor.
O Main clock output(8.38MHz).
I Main clock input(8.38MHz).
- Connected to ground.
- Connected to ground.
- Unused.
- Connected to ground.
O Data output to DIR/CODEC.
I Data input port from DIR/CODEC.
O Clock output to DIR/CODEC.
O Data output port to DSP.
I Data input port from DSP.
O Clock output port to DSP.
O Chip enable 1 output to DSP.
O Chip enable 2 output to DSP.
I Remote control signal input 1(Front panel).
I Remote control signal input 1(Rear panel).
I Detection port for DIR ERROR signal.
I Clock input of RDS demodulator IC.
I Detection port 1for DSP INTREQ.
I Detection port 2 for DSP INTREQ.
- Unused.
I Reset signal input for microprocessor.
O PD output port 1for DSP.
O PD output port 2 for DSP.
O Power down mode port for DIR.
O Power down mode port for CDDEC.
I Overflow detection port for CODEC analog signal.
O Chip select for CODEC.
I Data input of RDS demodulator IC.
- Unused.
O Data output to FL driver.
I Data input from FL driver.
O Clock output to FL driver.
O CE output to FL driver.
Description
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