Pwm Interface: 3-2=1 Pin; Ddc Channel: 4 Pins; Power & Ground: 22 Pins - ViewSonic VA903b-3 VS11372 Service Manual

TMDS_VDD
RX0P
RX0N
TMDS_GND
RXCP
RXCN
TMDS_GND
TMDS_VDD
PWM Interface: 3-2=1 pin (PWM1, PWM2 can be selected from 1 of 3 possible pins.)
Name
PWM2 / TCON [2] / S
[3]
PWM2 / TCON [13] /
COUT
PWM2 / TCON [12] /
COUT
PWM1 / TMDS_TST
PWM1 / DDCSDA /
TCON [1] / BBLU [0]
PWM1 / DDCSDA2
(HDCP) / TCON [7]
PWM0 / REFCLK

DDC Channel: 4 pins

Name
DDCSCL / TCON [0] /
BBLU [1]
DDCSDA / TCON [1] /
PWM1 / BBLU [0]
DDCSCL2 (HDCP) /
TCON [5]
DDCSDA2 (HDCP) /
TCON [7] /PWM1
Power & Ground: 22 pins
Name
3.3V Power
ViewSonic Corporation
P 19
I 20 Differential Data Input
I 21 Differential Data Input
G 22
I 23 Differential Data Input
I 24 Differential Data Input
G 25
P 26
Pin No Description
I/O
O 51 PWM2 / TCON [2] / SDIO [3]
O 55 PWM2 / TCON [13] / Crystal out
O 113 PWM2 / TCON [12] / Crystal out
AIO 9 PWM1/ TMDS_TEST Pin /
Power-on-latch for serial / parallel port
IO 47 PWM1 / DDC serial control I/F data input
/ output / TCON [4]
IO 125 PWM1 / DDC serial control I/F data input
/ output / TCON [7]
IO 112 PWM0 / (In / out) test pin for DCLK /
Video8 even-odd signal
I/O Pin No Description
I 46 DDC serial control I/F clock / TCON [0] /
TTL BBLU [1]
IO 47 DDC serial control I/F data input / output
/ TCON [1] / PWM1 / TTL BBLU [0]
I 126 DDC serial control I/F clock / TCON [5]
IO 125 DDC serial control I/F data input / output
/ TCON [7] / PWM1
Pin No
I/O
P 49,121
Description
VCCIO: 2
Confidential - Do Not Copy
20
(3.3V)
(3.3V)
Note
(1), (2), (3), (5), (8),
(2), (8), (9)
(2), (8), (9)
(2), (7), (8)
(1), (2), (3), (5), (8),
(1), (2), (3), (5), (8),
(2), (9)
Note
(2), (3), (5)
(1), (2), (3), (5), (6),
(8)/ 8mA /no slew
(2), (3), (5)
(1), (2), (3), (5), (6),
(8)/ 8mA /no slew
VA903b-1_ VA903m-1