
SLDS160 – MARCH 2009 .................................................................................................................................................................................................. www.ti.com
TERMINAL FUNCTIONS (continued)
TERMINAL
I/O
DESCRIPTION
NAME
NO.
Power down - An active low signal that controls the TFP401A power-down state. During
power down all output buffers are switched to a high impedance state. All analog circuits are
powered down and all inputs are disabled, except for PD.
PD
2
DI
If PD is left unconnected an internal pullup defaults the TFP401A to normal operation.
High : Normal operation
Low: Power down
Output drive power down - An active low signal that controls the power-down state of the
output drivers. During output drive power down, the output drivers (except SCDT and CTL1)
are driven to a high impedance state. When PDO is left unconnected, an internal pullup
PDO
9
DI
defaults the TFP401A to normal operation.
High : Normal operation/output drivers on
Low: Output drive power down.
PGND
98
GND
PLL GND - Ground reference and current return for internal PLL
Pixel select - Selects between one or two pixels per clock output modes. During the
2-pixel/clock mode, both even pixels, QE[23:0], and odd pixels, QO[23:0], are output in
tandem on a given clock cycle. During 1-pixel/clock, even and odd pixels are output
sequentially, one at a time, with the even pixel first, on the even pixel bus, QE[23:0]. (The
PIXS
4
DI
first pixel per line is pixel-0, the even pixel. The second pixel per line is pixel-1, the odd
pixel).
High : 2-pixel/clock
Low: 1-pixel/clock
PVDD
97
VDD
PLL VDD - Power supply for internal PLL
Even green pixel output - Output for even and odd green pixels when in 1-pixel/clock mode.
Output for even only green pixel when in 2-pixel/clock mode. Output data is synchronized to
QE[8:15]
20-27
DO
the output data clock, ODCK.
LSB: QE8/pin 20
MSB: QE15/pin 27
Even red pixel output - Output for even and odd red pixels when in 1-pixel/clock mode.
Output for even only red pixel when in 2-pixel/clock mode. Output data is synchronized to the
QE[16:23]
30-37
DO
output data clock, ODCK.
LSB: QE16/pin 30
MSB: QE23/pin 37
Odd blue pixel output - Output for odd only blue pixel when in 2-pixel/clock mode. Not used,
and held low, when in 1-pixel/clock mode. Output data is synchronized to the output data
QO[0:7]
49-56
DO
clock, ODCK.
LSB: QO0/pin 49
MSB: QO7/pin 56
Odd green pixel output - Output for odd only green pixel when in 2-pixel/clock mode. Not
used, and held low, when in 1-pixel/clock mode. Output data is synchronized to the output
QO[8:15]
59-66
DO
data clock, ODCK.
LSB: QO8/pin 59
MSB: QO15/pin 66
Odd red pixel output - Output for odd only red pixel when in 2-pixel/clock mode. Not used,
and held low, when in 1-pixel/clock mode. Output data is synchronized to the output data
QO[16:23]
69-75, 77
DO
clock, ODCK.
LSB: QO16/pin 69
MSB: QO23/pin 77
Even blue pixel output - Output for even and odd blue pixels when in 1-pixel/clock mode.
Output for even only blue pixel when in 2-pixel per clock mode. Output data is synchronized
QE[0:7]
10-17
DO
to the output data clock, ODCK.
LSB: QE0/pin 10
MSB: QE7/pin 17
Clock positive receiver input - Positive side of reference clock. TMDS low voltage signal
RxC+
93
AI
differential input pair.
Clock negative receiver input - Negative side of reference clock. TMDS low voltage signal
RxC-
94
AI
differential input pair.
Channel-0 positive receiver input - Positive side of channel-0. TMDS low voltage signal
differential input pair.
Rx0+
90
AI
Channel-0 receives blue pixel data in active display and HSYNC, VSYNC control signals in
blank.
4
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