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GS8000 Data Sheet
Proprietary and Confidential
25544 - 3
May 2005
4 of 16
18
OE
Non
Synchronous
Input
CONTROL SIGNAL INPUT
Output enable (active HIGH).
When set HIGH, the differential signal outputs will be active.
When set LOW, the differential signal outputs will mute.
19
SCDT
Non
Synchronous
Output
CONTROL SIGNAL OUTPUT
Sync detect (active HIGH).
Will be set HIGH when a valid signal has been detected at the
RXC/RXC pins.
NOTE: The SCDT pin can be connected to the OE pin to enable an
auto mute upon link inactivity function.
20
D_VDD
Non
Synchronous
Power
Digital core power supply. Connect to +3.3V DC.
21, 22
TXC, TXC
Analog
Output
Transition minimized differential signal (TMDS) output clock.
23, 30, 31
VDDQ
Analog
Power
Power supply for the differential output cable drivers. Connect to
+3.3V DC.
24, 25
TX0, TX0
Analog
Output
Transition minimized differential signal (TMDS) data output 0.
26, 27, 34
GNDQ
Analog
Power
Differential output cable driver ground connection.
28, 29
TX1, TX1
Analog
Output
Transition minimized differential signal (TMDS) data output 1.
32, 33
TX2, TX2
Analog
Output
Transition minimized differential signal (TMDS) data output 2.
35
OUT_SWI
NG
Analog
Input
Differential output signal amplitude.
An external 1% resistor connected from this input to GNDQ is used
to set the differential output signal amplitude.
Use 2k
to set the differential output signal swing to 1V.
36, 37
NC
–
–
No connection - leave floating.
38
DDC_GND
Analog
Power
LONG REACH DDC ground connection.
39
DDC_VDD
Analog
Power
LONG REACH
DDC power supply. Connect to +5V DC.
40
DDC_SCL
Non
Synchronous
I/O
Connect to display data channel (DDC) buffered serial clock (SCL).
41
DDC_SDA
Non
Synchronous
I/O
Connect to display data channel (DDC) buffered serial data (SDA).
42
A_GND
Analog
Power
Analog GND connection.
43
A_VDD
Analog
Power
Analog power supply. Connect to +3.3V DC.
Table 1-1: Pin Descriptions (Continued)
Pin Number
Name
Timing
Type
Description