Pioneer VSX-523-K Service Manual page 26

1
A (EPF025A)(D-MAIN ASSY: IC2001)
SUB CPU
• Pin Function
No. Symbol I/O
1 NC
2 CSCK_MAIN I
3 SCDO_MAIN I
4 HSCL I/O
5 HSDA I/O
6 3V3
7 NC
B
8 3V3
9 GND
10 NC
11 NC
12 3V3
13 NC
14 NC
15 SUB_RST I
16 SUB_OPO I
17 GND
18 NC
19 NC
20 NC
21 NC
C
22 D+1.2V_ON O
23 D+1.8V_ON O
24 NC
25 NC
26 NC
27 NC
28 NC
29 D+3.3V_FETON O
30 D+5V_FETON O
31 NC
32 NC
33 NC
34 NC
D
35 NC
36 SUB_IRQ O
37 THRU_LED O
38 NC
39 3V3
40 GND
41 XIN I
42 XO O
43 3V3
44 GND
45 RSTb O
46 NC
47 NC
E
48 3V3
49 HDMI_CEC I/O
50 GND
51 HT0_CTLB O
52 HT1_CTLB O
53 HT2_CTLB O
54 HT3_CTLB O
55 NC
56 NC
57 NC
58 INTb I
59 NC
60 HPD_IN I
F
61 NC
62 SUB_RXD I
63 SUB_TXD O
64 HDMI_CEC I/O
26
1
2
Not used
Clock signal input from main CPU
Data signal input from main CPU
IIC clock signal output pin
IIC data signal in/output pin
+3.3 V power supply
Not used
+3.3 V power supply
Ground
Not used
Not used
+3.3 V power supply
Not used
Not used
Sub CPU reset signal input pin
Chip operation mode select signal input pin (0: normal)
Ground
Not used
Not used
Not used
Not used
Control pin DSP IC +1.2 V REG. IC (on: H)
Control pin DSP IC +1.8 V REG. IC (on: H)
Not used
Not used
Not used
Not used
Not used
Control pin DSP IC +3.3 V REG. IC (on: H)
Control pin AK4588 IC +5 V REG. IC (on: H)
Not used
Not used
Not used
Not used
Not used
Interrupt signal output pin to main CPU
HDMI LED on/off control pin
Not used
+3.3 V power supply
Ground
Input for 24 MHz Crystal
output for 24 MHz Crystal
+3.3 V power supply
Ground
Reset signal output pin to HDMI IC
Not used
Not used
+3.3 V power supply
Data signal Input from HDMI_CEC
Ground
Hot plug detect signal output pin (DVD FUNCTION)
Hot plug detect signal output pin (SAT/CBL FUNCTION)
Hot plug detect signal output pin (GAME FUNCTION)
Hot plug detect signal output pin (BD FUNCTION)
Not used
Not used
Not used
interrupt signal input pin from EP9442
Not used
Intput for HDMIOUT HPD
Not used
Soft update UART comunication data input pin (UPDATE JIG B'D)
Soft update UART comunication data output pin (UPDATE JIG B'D)
Data signal Input from HDMI_CEC
2
3
Description
VSX-523-K
3
4
4