Pioneer PDP-505PU Service Manual page 88

1
M30622FH8PGP (DIGITAL VIDEO ASSY : IC5201)
• PDP UCOM
A
Pin Function (1/2)
No. Pin Name
1 VSUS
2 VOFS
3 TXD_IC4
4 RXD_IC4
5 CLK_IC4
6 BYTE
7 CNVSS
8 NC
B
9 NC
10 RST_MD
11 XOUT
12 VSS
13 XIN
14 VCC1
15 NMI
16 REM_B
17 KEY_B
18 RST2
C 19 HD_IN_B
20 PD_MUTE
21 PS_PD
22 DCC_PD
23 NC
24 NC
25 VD_IN
26 EEPRST
27 E_SCL
28 E_SDA
29 TXD
D
30 RXD
31 SCLK
32 BUSY
33 TXD0
34 RXD0
35 NC
36 REQ_MD
37 PSW_D
38 WE_IC4
39 EPM
E
40 IC4_RST
41 IC4_CE
42 IC4_BUSY
43 REQ_IC4
44 CE
45 PSIZE
46 B_SCL
47 B_SDA
48 ADR_PD
49 LED_G
F
50 LED_R
86
1
2
Function
[D/A] Vofs power control
[D/A] Vofs power control
3 serial communication with IC4MANTA - data transmission
3 serial communication with IC4MANTA - data receive
3 serial communication with IC4MANTA - clock output
(GND connection)
Pin for processor mode setting (pull-down)
NC pin
NC pin
Reset input
Output for main clock
GND
Input for main clock
Power supply = STB3.3V
(pull-up)
(Interruption) Remote control signal input (in the panel unit)
(Interruption) Key signal input (in the panel unit)
(Interruption) IC4 reset detection
HD signal existence distinction
Mute the power down output to the POWER SUPPLY Unit
PD signal in the POWER SUPPLY Unit
PD signal of DC-DC converter
NC pin
NC pin
V. frequency count
EEPROM power SW
IIC clock output for EEPROM
IIC data I/O for EEPROM
Communication with flash ROM writer - data transmission
Communication with flash ROM writer - data receive
Communication with flash ROM writer - clock input
Communication with flash ROM writer - busy output
UART communication with main UCOM (external PC) - data transmission
UART communication with main UCOM (external PC) - data receive
NC pin
Communication request to the main UCOM
Mute of DC-DC converter
In IC4 (MANTA) rewriting, control for communication path switch
Setting pin for flash rewriting mode (pull-down)
IC4 forced reset
Enable for IC4 communication
Busy input for IC4 communication
Communication request from the IC4
Setting pin for flash rewriting mode (pull-up)
Panel size distinction
IIC clock output for backup EEPROM
IIC DATA I/O for backup EEPROM
PD signal of address junction
Green LED control
Red LED control
PDP-505PE
2
3
3
4
I/0 ACTIVE
O
O
O
I
O
I
I
I L
−
O
− −
−
I
− −
I
I
I
I L
I L
O L
I H
I H
I L
O H
O
I/O
O
I
I
O
O
I
O H
O H
O H
I
O L
O L
I H
I H
I
I
O H
I/O H
I H
O L
O L
4