Texas Instruments TMS320C64x DSP - Manual (Page 64)

Video Capture Mode Selection
Video Capture Port 3-2 SPRU629
3.1 Video Capture Mode Selection
The video capture module operates in one of nine modes as listed in
Table 3–1. The transport stream interface (TSI) selection is made using the
TSI bit in the video port control register (VPCTL). The CMODE bits are in the
video capture channel x control register (VCxCTL). The Y/C and 16/20-bit raw
capture modes may only be selected for channel A and only if the DCHNL bit
in VPCTL is cleared to 0.
When operating as a raw video capture channel, no data selection or data
interpretation is performed. The 16/20-bit raw capture mode is designed to
accept data from A/D converters with resolution higher than eight bits (used,
for example, in medical imaging).
Table 3–1. Video Capture Mode Selection
TSI Bit CMODE Bits Mode Description
0 000 8-Bit ITU-R BT.656
Capture Digital video input is in YCbCr 4:2:2 with 8-bit
resolution multiplexed in ITU-R BT.656 format.
0 001 10-Bit ITU-R
BT.656 Capture Digital video input is in YCbCr 4:2:2 with 10-bit
resolution multiplexed in ITU-R BT.656 format.
0 010 8-Bit Raw Capture Raw 8-bit data capture at sampling rates up to
80 MHz.
0 011 10-Bit Raw Capture Raw 8-bit or 10-bit data capture at sampling rates up
to 80 MHz.
0 100 8-Bit Y/C Capture Digital video input is in YCbCr 4:2:2 with 8-bit
resolution on parallel Y and Cb/Cr multiplexed
channels.
0 101 10-Bit Y/C Capture Digital video input is in YCbCr 4:2:2 with 10-bit
resolution on parallel Y and Cb/Cr multiplexed
channels.
0 110 16-Bit Raw Capture Raw 16-bit data capture at sampling rates up to
80 MHz.
0 111 20-Bit Raw Capture Raw 20-bit data capture at sampling rates up to
80 MHz.
1 010 TSI Capture 8-bit parallel TSI capture at rates up to 30 MHz.