參數(shù)資料
型號(hào): ADV7189BBSTZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 40/104頁(yè)
文件大?。?/td> 0K
描述: IC VIDEO DECODER SDTV 80-LQFP
標(biāo)準(zhǔn)包裝: 1
類型: 視頻解碼器
應(yīng)用: 機(jī)頂盒,視頻播放器,錄音機(jī)
電壓 - 電源,模擬: 3.15 V ~ 3.45 V
電壓 - 電源,數(shù)字: 1.65 V ~ 2 V
安裝類型: 表面貼裝
封裝/外殼: 80-LQFP
供應(yīng)商設(shè)備封裝: 80-LQFP(14x14)
包裝: 托盤
ADV7189B
Rev. B | Page 40 of 104
SYNCHRONIZATION OUTPUT SIGNALS
HS Configuration
The following controls allow the user to configure the behavior
of the HS output pin only:
Beginning of HS signal via HSB[10:0]
End of HS signal via HSE[10:0]
Polarity of HS using PHS
The HS Begin and HS End registers allow the user to freely
position the HS output (pin) within the video line. The values
in HSB[10:0] and HSE[10:0] are measured in pixel units from
the falling edge of HS. Using both values, the user can program
both the position and length of the HS output signal.
HSB[10:0] HS Begin, Address 0x34[6:4], Address
0x35[7:0]
The position of this edge is controlled by placing a binary
number into HSB[10:0]. The number applied offsets the edge
with respect to an internal counter that is reset to 0 immediately
after EAV code FF, 00, 00, XY (see
201H
Figure 20). HSB is set to
00000000010b, which is 2 LLC1 clock cycles from count[0].
The default value of HSB is 0x002, indicating that the HS pulse
starts two pixels after the falling edge of HS.
HSE[10:0] HS End, Address 0x34[2:0], Address 0x36[7:0]
The position of this edge is controlled by placing a binary num-
ber into HSE[10:0]. The number applied offsets the edge with
respect to an internal counter that is reset to 0 immediately after
EAV Code FF, 00, 00, XY (see
202H
Figure 20). HSE is set to
00000000000b, which is 0 LLC1 clock cycles from count[0].
The default value of HSE[10:0] is 000, indicating that the HS
pulse ends zero pixels after falling edge of HS.
For example:
1.
To shift the HS toward active video by 20 LLC1s, add
20 LLC1s to both HSB and HSE, that is, HSB[10:0] =
[00000010110], HSE[10:0] = [00000010100].
2.
To shift the HS away from active video by 20 LLC1s,
add 1696 LLC1s to both HSB and HSE (for NTSC), that
is, HSB[10:0] =[1101010010], HSE[10:0] = [11010100000]
(1696 is derived from the NTSC total number of pixels =
1716).
To move 20 LLC1s away from active video is equal to subtracting
20 from 1716 and adding the result in binary to both HSB[10:0]
and HSE[10:0].
PHS Polarity HS, Address 0x37[7]
The polarity of the HS pin can be inverted using the PHS bit.
When PHS is 0 (default), HS is active high.
When PHS is 1, HS is active low.
Table 55. HS Timing Parameters (See
203H
Figure 20)
Characteristic
Standard
HS Begin Adjust
(HSB[10:0]) (Default)
HS End Adjust
(HSE[10:0]) (Default)
HS to Active Video (LLC1
Clock Cycles)
(C in
204H
Figure 20) (Default)
Active Video
Samples/Line
(D in
205H
Figure 20)
Total LLC1
Clock Cycles
(E in
206H
Figure 20)
NTSC
00000000010b
00000000000b
272
720Y + 720C = 1440
1716
NTSC Square
Pixel
00000000010b
00000000000b
276
640Y + 640C = 1280
1560
PAL
00000000010b
00000000000b
284
720Y + 720C = 1440
1728
04983-0-020
E
ACTIVE
VIDEO
LLC1
PIXEL
BUS
HS
Cr
Y
FF
00
XY
80
10
80
10
80
10
FF
00
XY
Cb
Y
Cr
Y
Cb
Y
Cr
4 LLC1
D
HSB[10:0]
HSE[10:0]
C
E
D
SAV
ACTIVE VIDEO
H BLANK
EAV
Figure 20. HS Timing
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