
ADV7188
Rev. A | Page 79 of 112
PIXEL PORT CONFIGURATION
The ADV7188 has a very flexible pixel port that can be config-
ured in a variety of formats to accommodate downstream ICs.
the ADV7188 pins can have in different modes of operation.
The order of components, for example, the order of Cr and Cb,
on the output pixel bus can be changed. Refer to the
SWPC,the default positions for the Cr/Cb components.
PIXEL PORT–RELATED CONTROLS
OF_SEL [3:0], Output Format Selection, Address 0x03 [5:2]
The modes in which the ADV7188 pixel port can be configured
are controlled by OF_SEL [3:0]. See
Table 102 for details.
The default LLC frequency output on the LLC1 pin is approxi-
mately 27 MHz. For modes that operate with a nominal data
rate of 13.5 MHz (0001, 0010), the clock frequency on the
LLC1 pin stays at the higher rate of 27 MHz. For information
on outputting the nominal 13.5 MHz clock on the LLC1
SWPC, Swap Pixel Cr/Cb, Address 0x27 [7]
0 (default)—No swapping is allowed.
1—The Cr and Cb values can be swapped.
LLC_PAD_SEL [2:0], LLC1 Output Selection,
Address 0x8F [6:4]
The following I2C write allows the user to select between LLC1
(nominally at 27 MHz) and LLC2 (nominally at 13.5 MHz).
The LLC2 signal is useful for LLC2-compatible wide bus
The LLC2 signal and data on the data bus are synchronized. By
default, the rising edge of LLC1/LLC2 is aligned with the Y data;
the falling edge occurs when the data bus holds C data. The polarity
of the clock, and therefore the Y/C assignments for the clock edges,
can be altered by using the polarity LLC pin.
000 (default)—The output is nominally 27 MHz LLC on the
LLC1 pin.
101—The output is nominally 13.5 MHz LLC on the LLC1 pin.
Table 101. P19 to P0 Output/Input Pin Mapping
Output of Data Port Pins P [19:0]
Processor, Format, and Mode
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Video Output, 8-Bit, 4:2:2
YCrCb [7:0]
Video Output, 10-Bit, 4:2:2
YCrCb [9:0]
Video Output, 16-Bit, 4:2:2
Y [7:0]
CrCb [7:0]
Video Output, 20-Bit, 4:2:2
Y [9:0]
CrCb [9:0]
Table 102. Standard Definition Pixel Port Modes
Pixel Port Pins P [19:0]
P [19:10]
P9 [9:0]
OF_SEL [3:0]
Format
P [19:12]
P [11:10]
P [9:2]
P [1:0]
0000
10-Bit at LLC1 4:2:2
YCrCb [9:2]
YCrCb [1:0]
Three-state
0001
20-Bit at LLC2 4:2:2
Y [9:2]
Y [1:0]
CrCb [9:2]
CrCb [1:0]
0010
16-Bit at LLC2 4:2:2
Y [7:0]
Three-state
CrCb [7:0]
Three-state
0011 (default)
8-Bit at LLC1 4:2:2
YCrCb [7:0]
Three-state
0110 to 1111
Reserved
Reserved—do not use