ViewSonic VA703b-4 - Page 26

ViewSonic Corporation 23 Confidential - Do Not Copy VA703b-4_VA703m-4
 DDC Channel: 4 pins
Name I/O Pin No Description Note
DDCSCL / TCON [0] /
BBLU [1]
I 46 DDC serial control I/F clock / TCON [0] /
TTL BBLU [1]
(2), (3), (5)
DDCSDA / TCON [1] /
PWM1 / BBLU [0]
IO 47 DDC serial control I/F data input / output
/ TCON [1] / PWM1 / TTL BBLU [0]
(1), (2), (3), (5), (6),
(8)/ 8mA /no slew
DDCSCL2 (HDCP) /
TCON [5]
I 126 DDC serial control I/F clock / TCON [5] (2), (3), (5)
DDCSDA2 (HDCP) /
TCON [7] /PWM1
IO 125 DDC serial control I/F data input / output
/ TCON [7] / PWM1
(1), (2), (3), (5), (6),
(8)/ 8mA /no slew
 Power & Ground: 22 pins
Name
I/O
Pin No Description
3.3V Power P 49,121 VCCIO: 2
3.3V Ground G 48,120 GNDIO: 2
3.3V Power P 58,71,83,95,110 PVCC: 5
3.3V Ground G 57,72,84,96,109 PGND: 5
2.5V Power P 45,69,98,127 VCCK: 4
2.5V Ground G 44,70,97,128 GNDIK: 4
Note: (1) TTL compatible CMOS Input (Vt=1.7V); VCC=3.3V;
(2) 5V tolerance pad;
(3) Internal 75K Ohms pull high resistor.
(4) Internal 75K Ohms pull low resistor.
(5) Schmitt trigger CMOS Input (Vt=1.4-~2.2V);
(6) Open-Drain, Output Drive low & Pull-high.
(7) Bi-directional input/output
(8) Programmable driving current (2~10mA)
(9) TTL output 5V & 3.3V
(10) 4V tolerance pad