參數(shù)資料
型號(hào): ADV7171*
廠商: Analog Devices, Inc.
英文描述: Digital PAL/NTSC Video Encoder with 10-Bit SSAF and Advanced Power Management
中文描述: 數(shù)碼PAL / NTSC視頻編碼器與10位SSAF和高級(jí)電源管理
文件頁(yè)數(shù): 18/55頁(yè)
文件大?。?/td> 754K
ADV7170/ADV7171
–18–
REV. 0
Mode 1: Master Option
HSYNC
,
BLANK
, FIELD
(Timing Register 0 TR0 = X X X X X 0 1 1)
In this mode the ADV7170/ADV7171 can generate horizontal SYNC and Odd/Even FIELD signals. A transition of the FIELD
input when
HSYNC
is low indicates a new frame, i.e., vertical retrace. The
BLANK
signal is optional. When the
BLANK
input is
disabled, the ADV7170/ADV7171 automatically blanks all normally blank lines as per CCIR-624. Pixel data is latched on the rising
clock edge following the timing signal transitions. Mode 1 is illustrated in Figure 24 (NTSC) and Figure 25 (PAL). Figure 26 illus-
trates the
HSYNC
,
BLANK
and FIELD for an odd or even field transition relative to the pixel data.
FIELD
PIXEL
DATA
PAL = 12 * CLOCK/2
NTSC = 16 * CLOCK/2
PAL = 132 * CLOCK/2
NTSC = 122 * CLOCK/2
Cb
Y
Cr
Y
HSYNC
BLANK
Figure 26. Timing Mode 1 Odd/Even Field Transitions Master/Slave
Mode 2: Slave Option
HSYNC
,
VSYNC
,
BLANK
(Timing Register 0 TR0 = X X X X X 1 0 0)
In this mode the ADV7170/ADV7171 accepts horizontal and vertical SYNC signals. A coincident low transition of both
HSYNC
and
VSYNC
inputs indicates the start of an odd field. A
VSYNC
low transition when
HSYNC
is high indicates the start of an even field.
The
BLANK
signal is optional. When the
BLANK
input is disabled, the ADV7170/ADV7171 automatically blanks all normally
blank lines as per CCIR-624. Mode 2 is illustrated in Figure 27 (NTSC) and Figure 28 (PAL).
522
523
524
525
1
2
3
4
5
6
7
8
9
10
11
20
21
22
DISPLAY
DISPLAY
VERTICAL BLANK
ODD FIELD
EVEN FIELD
HSYNC
BLANK
VSYNC
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
283
284
285
ODD FIELD
EVEN FIELD
DISPLAY
DISPLAY
VERTICAL BLANK
HSYNC
BLANK
VSYNC
Figure 27. Timing Mode 2 (NTSC)
相關(guān)PDF資料
PDF描述
ADV7171 Digital PAL/NTSC Video Encoder(數(shù)字PAL/NTSC視頻編碼器)
ADV7173KST Digital PAL/NTSC Video Encoder with Six DACs 10 Bits, Color Control and Enhanced Power Management
ADV7172KST Digital PAL/NTSC Video Encoder with Six DACs 10 Bits, Color Control and Enhanced Power Management
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