HMP8170 Datasheet, PDF (17/33 Pages) Intersil Corporation – NTSC/PAL Video Encoder

HMP8170, HMP8171, HMP8172, HMP8173
BIT
NUMBER
7-6
5
4
3
2
1-0
FUNCTION
Reserved
CLK Polarity Control
CLK Output Control
Aspect Ratio Mode
Reserved
Subcarrier PHINC
Select
TABLE 19. TIMING I/O REGISTER #2
SUB ADDRESS = 05_H
DESCRIPTION
0 = Inputs are sampled when CLK is low (see Table 2).
1 = Inputs are sampled when CLK is high.
0 = CLK is an input
1 = CLK is an output
This bit must be set to “0” during BT.656 input mode.
0 = Rectangular (BT.601) pixels
1 = Square pixels
Selects the source of the color subcarrier NCO phase increment value.
00 = Internal (fixed) data.
01 = Reserved
10 = BT.656 RTCI ancillary data
11 = I²C interface PHINC register
BIT
NUMBER
7-6
FUNCTION
Closed Captioning
Enable
5-4
WSS Enable
3
Teletext Enable
1-0
Reserved
TABLE 20. AUXILIARY DATA ENABLE REGISTER
SUB ADDRESS = 06_H
DESCRIPTION
00 = Closed caption disabled
01 = Closed caption enabled for odd fields: line 21 for NTSC, line 18 for (M) PAL, or line 22 for
(B, D, G, H, I, N, NC) PAL
10 = Closed caption enabled for even fields: line 284 for NTSC, line 281 for (M) PAL, or line
335 for (B, D, G, H, I, N, NC) PAL
11 = Closed caption enabled for both odd and even fields
00 = WSS disabled
01 = WSS enabled for odd fields: line 20 for NTSC; line 17 for (M) PAL, or line 23 for (B, D, G,
H, I, N, NC) PAL
10 = WSS enabled for even fields: line 283 for NTSC, line 280 for (M) PAL, or line 336 for (B,
D, G, H, I, N, NC) PAL
11 = WSS enabled for both odd and even fields
00 = Teletext disabled
01 = System B teletext enabled
10 = System C teletext enabled
11 = reserved
BIT
NUMBER
7
FUNCTION
Closed Caption
Line 21
BT.656 Enable
6
Closed Caption
Line 284
BT.656 Enable
5
WSS Line 20
BT.656 Enable
4
WSS Line 283
BT.656 Enable
3-0
Reserved
TABLE 21. VBI DATA INPUT REGISTER
SUB ADDRESS = 07_H
DESCRIPTION
Setting this bit enables BT.656 ancillary data to be written into the closed caption line 21 data
registers. It is ignored unless in the BT.656 input mode.
0 = Ignore BT.656 ancillary data
1 = Use BT.656 ancillary data
Setting this bit enables BT.656 ancillary data to be written into the closed caption line 284 data
registers. It is ignored unless in the BT.656 input mode.
0 = Ignore BT.656 ancillary data
1 = Use BT.656 ancillary data
Setting this bit enables BT.656 ancillary data to be written into the WSS line 20 data registers.
It is ignored unless in the BT.656 input mode.
0 = Ignore BT.656 ancillary data
1 = Use BT.656 ancillary data
Setting this bit enables BT.656 ancillary data to be written into the WSS line 283 data registers.
It is ignored unless in the BT.656 input mode.
0 = Ignore BT.656 ancillary data
1 = Use BT.656 ancillary data
RESET
STATE
00_B
0_B
0_B
0_B
0_B
00_B
RESET
STATE
00_B
00_B
00_B
00_B
RESET
STATE
0_B
0_B
0_B
0_B
0000_B
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