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參數(shù)資料
| 型號： | EVAL-ADV7179EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 29/52頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVALUATION FOR ADV7179 |
| 設(shè)計資源： | ADV7174/79 Eval Brd Docs |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 主要目的： | 視頻，視頻處理 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | ADV7179 |
| 主要屬性： | NTSC/PAL 數(shù)字視頻編碼器 |
| 次要屬性： | I²C 接口 |
| 已供物品： | 板 |
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ADV7174/ADV7179
Rev. B | Page 35 of 52
SUBCARRIER FREQUENCY REGISTERS 3–0
Bits:
FSC3–FSC0
Address:
SR4–SR00 = 09H–0CH
These 8-bit-wide registers are used to set up the subcarrier frequency. The value of these registers is calculated by using the following
equation:
*
232
×
Line
Video
One
in
Cycles
Clock
MHz
27
of
No.
Line
Video
of
Line
One
in
Values
Frequency
r
Subcarrie
of
No.
* Rounded to the nearest integer.
For example, in NTSC mode,
Eh
1
C
07
F
21
d
569408542
2
1716
5
.
227
32
=
×
=
Value
Frequency
Subcarrier
Note that on power-up, FSC Register 0 is set to 16h. A value of 1E as derived above is recommended.
Program as
FSC Register 0: 1EH
FSC Register 2: 7CH
FSC Register 3: F0H
FSC Register 4: 21H
Figure 45 shows how the frequency is set up by the four registers.
SUBCARRIER
FREQUENCY
REG 3
SUBCARRIER
FREQUENCY
REG 2
SUBCARRIER
FREQUENCY
REG 1
SUBCARRIER
FREQUENCY
REG 0
FSC30
FSC29
FSC27
FSC25
FSC28
FSC24
FSC31
FSC26
FSC22
FSC21
FSC19
FSC17
FSC20
FSC16
FSC23
FSC18
FSC14
FSC13
FSC11
FSC9
FSC12
FSC8
FSC15
FSC10
FSC6
FSC5
FSC3
FSC1
FSC4
FSC0
FSC7
FSC2
02980-A
-044
Figure 45. Subcarrier Frequency Register
SUBCARRIER PHASE REGISTER
Bits:
FP7–FP0
Address:
SR4–SR0 = 0DH
This 8-bit-wide register is used to set up the subcarrier phase. Each bit represents 1.41°. For normal operation, this register is set to 00H.
CLOSED CAPTIONING EVEN FIELD DATA REGISTERS 1–0
Bits:
CED15–CED0
Address:
SR4–SR0 = 0EH–0FH
These 8-bit-wide registers are used to set up the closed captioning extended data bytes on even fields. Figure 46 shows how the high and
low bytes are set up in the registers.
BYTE 1
BYTE 0
CED6
CED5
CED3
CED1
CED4
CED2
CED0
CED7
CED14 CED13
CED11
CED9
CED12
CED10
CED8
CED15
002980-A
-045
Figure 46. Closed Captioning Extended Data Register
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