Preliminary specification
Supersedes data of 1995 Jun 13
File under Integrated Circuits, IC22
1995 Nov 03
Philips SemiconductorsPreliminary specification
YUV-to-RGB Digital-to-Analog
Converter (DAC)
FEATURES
• On-chip mixing of digital video data and analog
RGB signals
• Supports video input format of YUV 4 :2:2, 4:1:1,
2:1:1 and RGB 5:6:5
• Video input rate up to 50 MHz
• Allows for both binary and two’s complement video
input data
• Triple 8-bit DACs for video output
• Built-in voltage output amplifier
• Provide keying control with external key and internal
8-bit, 2 × 8-bit and 3 × 8-bit pixel colour key
2
• Programmable via the I
• 5 V CMOS device; LQFP48 package.
GENERAL DESCRIPTION
The SAA7167 is a mixed-mode designed IC containing a
video data path, keying control block, analog mixer, and a
C-bus
SAA7167
voltage output amplifier, capable of converting digital video
data to analog RGB video, and then mixing video and
external analog RGB inputs.
The video data path contains a data re-formatter,
YUV-to-RGB colour space matrix as well as triple DACs for
video data processing. An analog mixer performs
multiplexing between DAC outputs of the video path and
external analog RGB inputs.
The final analog outputs are buffered with built-in voltage
output amplifiers to provide the direct driving capability for
a 150 Ω load. Figure 1 shows the overall block diagram.
digital supply voltage4.755.25V
analog supply voltage4.755.25V
operating ambient temperature070°C
PACKAGE
NAMEDESCRIPTIONVERSION
1995 Nov 032
Philips SemiconductorsPreliminary specification
YUV-to-RGB Digital-to-Analog
Converter (DAC)
BLOCK DIAGRAM
handbook, full pagewidth
YUV7 to
YUV0
UV7 to
UV0
HREF
SDA
SCL
RES
38 to
45
46 to 48,
1 to 5
9
22
23
24
RE-
FORMATTER
2
C-BUS
I
CONTROL
YUV
TO
RGB
MATRIX
SAA7167
C
ref(h)
Bin Gin Rin
293631 33
MIXER
8-BIT
MUX
CLOCK
GENERATOR
VCLKPCLKEXTKEYP7 to P0
DAC
(3×)
MIXER
MIXER
KEYING CONTROL
8
13 to 2021106
OPAMP
OPAMP
OPAMP
SAA7167
Rout
32
Gout
30
Bout
28
MGB743
Fig.1 Block diagram.
1995 Nov 033
Philips SemiconductorsPreliminary specification
YUV-to-RGB Digital-to-Analog
SAA7167
Converter (DAC)
PINNING
SYMBOLPINDESCRIPTIONI/O
UV41digital video UV (of YUV format 4:1:1 and 4:2:2) input data, or digital G and R
input data
UV32digital video UV (of YUV format 4:1:1 and 4:2:2) input data, or digital G and R
input data
UV23digital video UV (of YUV format 4:1:1 and 4:2:2) input data, or digital G and R
input data
UV14digital video UV (of YUV format 4:1:1 and 4:2:2) input data, or digital G and R
input data
UV05digital video UV (of YUV format 4:1:1 and 4:2:2) input data, or digital G and R
input data
VCLK6video clock inputI
V
DDD
V
SSD
HREF9horizontal reference input signalI
PCLK10pixel clock inputI
AP11test pins, normally connected to groundI
SP12test pins, normally connected to groundI
P713pixel bus input 7 (for keying control)I
P614pixel bus input 6 (for keying control)I
P515pixel bus input 5 (for keying control)I
P416pixel bus input 4 (for keying control)I
P317pixel bus input 3 (for keying control)I
P218pixel bus input 2 (for keying control)I
P119pixel bus input 1 (for keying control)I
P020pixel bus input 0 (for keying control)I
EXTKEY21external key signal inputI
SDA22I
SCL23I
RES24set to LOW to reset the I2C-busI
n.c.25not connected−
V
SSA2
V
DDA2
Bout28analog Blue signal outputO
Bin29analog Blue signal inputI
Gout30analog Green signal outputO
Gin31analog Green signal inputI
Rout32analog Red signal outputO
Rin33analog Red signal inputI
V
SSA1
V
DDA1
C
ref(h)
7digital supply voltageI/O
8digital groundI/O
2
C-bus data lineI/O
2
C-bus clock lineI
26analog ground 2I/O
27analog supply voltage 2I/O
34analog ground 1I/O
35analog supply voltage 1I/O
36capacitor for reference high voltage output (2.25 V)I/O
I
I
I
I
I
1995 Nov 034
Philips SemiconductorsPreliminary specification
YUV-to-RGB Digital-to-Analog
SAA7167
Converter (DAC)
SYMBOLPINDESCRIPTIONI/O
n.c.37not connected−
YUV738digital video Y or UV (of YUV format 2:1:1) input data, or digital G and B input dataI
YUV639digital video Y or UV (of YUV format 2:1:1) input data, or digital G and B input dataI
YUV540digital video Y or UV (of YUV format 2:1:1) input data, or digital G and B input dataI
YUV441digital video Y or UV (of YUV format 2:1:1) input data, or digital G and B input dataI
YUV342digital video Y or UV (of YUV format 2:1:1) input data, or digital G and B input dataI
YUV243digital video Y or UV (of YUV format 2:1:1) input data, or digital G and B input dataI
YUV144digital video Y or UV (of YUV format 2:1:1) input data, or digital G and B input dataI
YUV045digital video Y or UV (of YUV format 2:1:1) input data, or digital G and B input dataI
UV746digital video UV (of YUV format 4:1:1 and 4:2:2) input data, or digital G and R
input data
UV647digital video UV (of YUV format 4:1:1 and 4:2:2) input data, or digital G and R
input data
UV548digital video UV (of YUV format 4:1:1 and 4:2:2) input data, or digital G and R
input data
I
I
I
UV4
UV3
UV2
UV1
UV0
VCLK
V
DDD
V
SSD
HREF
PCLK
index
corner
AP
SP
UV7
UV6
47
14
P6
YUV0
YUV1
46
45
44
SAA7167
15
16
17
P5
P4
P3
UV5
48
1
2
3
4
5
6
7
8
9
10
11
12
13
P7
YUV2
43
18
P2
YUV3
42
19
P1
YUV4
41
20
P0
YUV5
YUV6
40
39
21
22
SDA
EXTKEY
YUV7
38
23
SCL
n.c.
2437
RES
36
35
34
33
32
31
30
29
28
27
26
25
MGB744
C
ref(h)
V
DDA1
V
SSA1
Rin
Rout
Gin
Gout
Bin
Bout
V
DDA2
V
SSA2
n.c.
Fig.2 Pin configuration.
1995 Nov 035
Philips SemiconductorsPreliminary specification
YUV-to-RGB Digital-to-Analog
Converter (DAC)
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.
E-FORMATTER
R
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 1Pixel 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