JVC TH-A75R Service Manual page 46

TH-A75R
4.25 MN101C49GKR (IC271) : System micom
• Pin layout
• Pin function
Pin No. Symbol
1
2 NTSEL(RGB--SEL)
3 VCR-S/C
4 DBS-S/C
5 TH-DET
6 SAFETY1
7 VERSION
8 KEY-IN1
9 KEY-IN2
10 VREF+
11
12
13
14
15,16
17
18
19
20
21 S2UDT/TX (DATA OUT)
22 S2UDT/RX (DATA IN)
23 SCLK/CLK
24
25 CPU-RESET
26
27 REMOCON
28 PROTECT
29 RDS ST
30
31
32 VDD2/FLASH-VDD
33 RESET-IN/RST
34 DSP-RST
35 DSP-RDY
36 AVC-OUT
37 AVC-IN
38~40
41 VPP/FLASH-VSS
42 DSP-COM
43 DSP-STAT
44 DSP-CLK
45 VOL-DATA
46 VOL-LATCH
47 VOL-CLK
1-46 (No.21189)
100 76
1 75
25 51
26 50
I/O
VREF- - Connect to ground
I NTSC/PAL discrimination (RGB/YC switching discrimination) signal
I VCR S/Composite detection signal
I DBS S/Composite detection signal
I Heat sink temp. detection
I Short detection signal
I Version select switch signal
I Key input1 (AD)
I Key input2 (AD)
- Reference power supply
VDD - Power supply
OSC2 O Oscillator output (8MHz)
OSC1 I Oscillator input (8MHz)
GND - Ground
NC - Not used
GND - Ground
DI-DO O Panel serial communication data output
NC - Not used
DI-CK O Panel serial communication clock output
O Serial communication data output for PANTERA
I Serial communication data input for PANTERA
I Serial communication clock for PANTERA
INTP O Transmit request for PANTERA communication
O Reset signal for PANTERA
CS I Receive request for PANTERA communication (Interruption)
I Remote control signal input (interruption)
I Speaker protect detection
I RDS communication strobe (Interruption)
NC - Not used
GND - Ground
- VDD for Flash write
I System control micom reset input
O DSP micom reset signal output
O DSP micom ready signal
O AV compulink signal output
I AV compulink signal input
NC - Not used
- VPP for Flash write
O DSP serial communication data output
I DSP serial communication data input
O DSP serial communication clock
O VOLUME serial communication data output
O VOLUME serial communication strobe
O VOLUME serial communication clock
Function