JAJST56D October 2001 – February 2024 TFP410
PRODUCTION DATA
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For transition minimized differential signaling (T.M.D.S.), only one of two possible T.M.D.S. characters for a given pixel is transmitted at a given time. The transmitter keeps a running count of the number of ones and zeros previously sent and transmits the character that minimizes the number of transitions and approximates a dc balance of the transmission line. Three T.M.D.S. channels are used to transmit RGB pixel data during the active video interval (DE = High). These same three channels are also used to transmit HSYNC, VSYNC, and three control signals, CTL[3:1], during the inactive display or blanking interval (DE = Low). The following table maps the transmitted output data to the appropriate T.M.D.S. output channel in a DVI-compliant system.
INPUT
PINS (VALID FOR DE = High) |
T.M.D.S. OUTPUT CHANNEL | TRANSMITTED PIXEL DATA ACTIVE DISPLAY (DE = High) |
---|---|---|
DATA[23:16] | Channel 2 (TX2 ±) | Red[7:0] |
DATA[15:8] | Channel 1 (TX1 ±) | Green[7:0] |
DATA[7:0] | Channel 0 (TX0 ±) | Blue[7:0] |
INPUT
PINS (VALID FOR DE = Low) |
T.M.D.S. OUTPUT CHANNEL | TRANSMITTED CONTROL DATA BLANKING INTERVAL (DE = Low) |
CTL2(1) | Channel 2 (TX2 ±) | CTL[2] |
CTL1 (1) | Channel 1 (TX1 ±) | CTL[1] |
HSYNC, VSYNC | Channel 0 (TX0 ±) | HSYNC, VSYNC |