SAA7167 Datasheet, PDF (6/20 Pages) NXP Semiconductors – YUV-to-RGB Digital-to-Analog Converter DAC

Philips Semiconductors
YUV-to-RGB Digital-to-Analog
Converter (DAC)
Preliminary specification
SAA7167
FUNCTIONAL DESCRIPTION
The SAA7167 contains a video data path, 3 analog mixers
and voltage output amplifiers for the RGB channels
respectively, a keying control block as well as an I²C-bus
control block.
Video data path
The video data path includes a video data re-formatter, a
YUV-to-RGB colour space conversion matrix, and triple
8-bit DACs.
RE-FORMATTER
The re-formatter de-multiplexes the different video formats
YUV 4 : 1 : 1, 4 : 2 : 2 or 2 : 1 : 1 to internal YUV 4 : 4 : 4,
which can then be processed by the RGB matrix. The pixel
byte sequences of those video input formats are shown in
Tables 1 to 4.
Table 1 Pixel byte sequence of 4 : 2 : 2
INPUT
YUV0 (LSB)
YUV1
YUV2
YUV3
YUV4
YUV5
YUV6
YUV7 (MSB)
UV0 (LSB)
UV1
UV2
UV3
UV4
UV5
UV6
UV7 (MSB)
Y data
UV data
PIXEL BYTE SEQUENCE OF
4:2:2
Y0 Y0 Y0 Y0 Y0 Y0
Y1 Y1 Y1 Y1 Y1 Y1
Y2 Y2 Y2 Y2 Y2 Y2
Y3 Y3 Y3 Y3 Y3 Y3
Y4 Y4 Y4 Y4 Y4 Y4
Y5 Y5 Y5 Y5 Y5 Y5
Y6 Y6 Y6 Y6 Y6 Y6
Y7 Y7 Y7 Y7 Y7 Y7
U0 V0 U0 V0 U0 V0
U1 V1 U1 V1 U1 V1
U2 V2 U2 V2 U2 V2
U3 V3 U3 V3 U3 V3
U4 V4 U4 V4 U4 V4
U5 V5 U5 V5 U5 V5
U6 V6 U6 V6 U6 V6
U7 V7 U7 V7 U7 V7
012345
0
2
4
Table 2 Pixel byte sequence of 4 : 1 : 1
INPUT
YUV0
YUV1
YUV2
YUV3
YUV4
YUV5
YUV6
YUV7
UV0
UV1
UV2
UV3
UV4
UV5
UV6
UV7
Y data
UV data
PIXEL BYTE SEQUENCE OF 4 : 1 : 1
Y0 Y0 Y0 Y0 Y0 Y0 Y0 Y0
Y1 Y1 Y1 Y1 Y1 Y1 Y1 Y1
Y2 Y2 Y2 Y2 Y2 Y2 Y2 Y2
Y3 Y3 Y3 Y3 Y3 Y3 Y3 Y3
Y4 Y4 Y4 Y4 Y4 Y4 Y4 Y4
Y5 Y5 Y5 Y5 Y5 Y5 Y5 Y5
Y6 Y6 Y6 Y6 Y6 Y6 Y6 Y6
Y7 Y7 Y7 Y7 Y7 Y7 Y7 Y7
XXXXXXXX
XXXXXXXX
XXXXXXXX
XXXXXXXX
V6 V4 V2 V0 V6 V4 V2 V0
V7 V5 V3 V1 V7 V5 V3 V1
U6 U4 U2 U0 U6 U4 U2 U0
U7 U5 U3 U1 U7 U5 U3 U1
01234567
0
4
Table 3 Pixel byte sequence of 2 : 1 : 1
INPUT
YUV0
YUV1
YUV2
YUV3
YUV4
YUV5
YUV6
YUV7
Y data
UV data
PIXEL BYTE SEQUENCE OF 2 : 1 : 1
U0 Y0 V0 Y0 U0 Y0 V0 Y0
U1 Y1 V1 Y1 U1 Y1 V1 Y1
U2 Y2 V2 Y2 U2 Y2 V2 Y2
U3 Y3 V3 Y3 U3 Y3 V3 Y3
U4 Y4 V4 Y4 U4 Y4 V4 Y4
U5 Y5 V5 Y5 U5 Y5 V5 Y5
U6 Y6 V6 Y6 U6 Y6 V6 Y6
U7 Y7 V7 Y7 U7 Y7 V7 Y7
X0X2X4X6
0X0X4X4X
1995 Nov 03
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