Pioneer HTP-072 Service Manual page 26

1
A (EPF025A)(D-MAIN Assy: IC2023)
SUB UCOM
• Pin Function
No. Symbol
1 PULL DOWN
2 CSCK_MAIN
3 SCDO_MAIN
4 HSCL
5 HSDA
6 PULL UP
7 PULL UP
B
8 3V3
9 GND
10 PULL DOWN
11 NC
12 3V3
13 NC
14 NC
15 SUB_RST
16 SUB_OPO
17 GND
18 NC
19 NC
20 NC
21 NC
C
22 NC
23 NC
24 NC
25 NC
26 NC
27 DDC_SCL
28 DDC_SDA
29 NC
30 NC
31 NC
32 NC
33 NC
34 NC
D
35 MAIN_IRQ
36 SUB_IRQ
37 THRU_LED
38 NC
39 3V3
40 GND
41 XIN
42 XO
43 3V3
44 GND
45 RSTb
46 NC
47 NC
E
48 PULL UP
49 HDMI_CEC
50 GND
51 HT0_CTLB
52 HT1_CTLB
53 HT2_CTLB
54 HT3_CTLB
55 NC
56 NC
57 NC
58 INTb
59 NC
60 HPD_IN
F
61 GND
62 SUB_RXD
63 SUB_TXD
64 HDMI_CEC
26
1
2
I/O
Pull down
I Clock signal input from MAIN UCOM
I Data signal Input from MAIN UCOM
I/O IIC clock signal output pin
I/O IIC data signal in/output pin
Pull up
Pull up
+3.3 V power supply
Ground
Pull down
Not used
+3.3 V power supply
Not used
Not used
I SUB UCOM reset signal input pin
I Chip operation mode select signal input pin (0: normal)
Ground
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
I/O IIC clock signal output pin
I/O IIC data signal in/output pin
Not used
Not used
Not used
Not used
Not used
Not used
O Interrupt signal output pin to SUB UCOM
O Interrupt signal output pin to MAIN UCOM
O HDMI LED on/off control pin
Not used
+3.3 V power supply
Ground
I Input for 24 MHz crystal
O output for 24 MHz crystal
+3.3 V power supply
Ground
O Reset signal output pin to HDMI IC
Not used
Not used
Pull up
I/O Data signal input from HDMI_CEC
Ground
O Hot plug detect signal output pin (DVD FUNCTION)
O Hot plug detect signal output pin (SAT/CBL FUNCTION)
O Hot plug detect signal output pin (GAME FUNCTION)
O Hot plug detect signal output pin(BD FUNCTION)
Not used
Not used
Not used
I Interrupt signal input pin from EP9442
Not used
I Intput for HDMIOUT HPD
Ground
I Soft update UART comunication data input pin (UPDATE JIG B'D)
O Soft update UART comunication data output pin (UPDATE JIG B'D)
I/O Data signal input from HDMI_CEC
2
3
Description
HTP-072
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