參數(shù)資料
型號(hào): AK4704
廠商: Asahi Kasei Microsystems Co.,Ltd
英文描述: 2ch 24bit DAC with AV SCART switch
中文描述: 2通道24位DAC,具有影音SCART開(kāi)關(guān)
文件頁(yè)數(shù): 27/44頁(yè)
文件大?。?/td> 440K
代理商: AK4704
ASAHI KASEI
AKM CONFIDENTIAL
[AK4704]
Rev. 0.5
2004/1
- 27 -
4. Blanking Control
The AK4704 supports Fast Blanking signals and Slow Blanking (Function Switching) signals for TV/VCR SCART.
Input/Output Control for Fast/Slow Blanking
FB1-0: TV Fast Blanking output control (07H: D1-D0)
FB1
FB0
0
0
0
1
1
0
Same as VCR FB input (4V/0V)
1
1
(note: minimum load is 150ohm)
Table 18. TV Fast Blanking output
SBT1-0: TV Slow Blanking output control (07H: D3-D2)
SBT1
SBT0
0
0
0
1
1
0
1
1
(note: minimum load is 10kohm)
Table 19. TV Slow Blanking output
SBV1-0: VCR Slow Blanking output control (07H: D5-D4)
SBV1
SBV0
VCRSB pin Output Level
0
0
0
1
1
0
1
1
(note: minimum load is 10kohm)
Table 20. VCR Slow Blanking output
SBIO1-0: TV/VCR Slow Blanking I/O control (07H: D7-D6)
SBIO1
SBIO0
VCRSB pin Direction
Output
(Controlled by SBV1,0)
0
1
(Reserved)
Input
(Stored in SVCR1,0)
Input
(Stored in SVCR1,0)
Table 21. TV/VCR Slow Blanking I/O control
TVFB pin Output Level
0V (default)
4V
(Reserved)
TVSB pin Output Level
<2V (default)
5V<, <7V
(Reserved)
10V<
<2V (default)
5V<, <7V
(Reserved)
10V<
TVSB pin Direction
Output
(Controlled by SBT1,0)
(Reserved)
Output
(Controlled by SBT1,0)
Output
(Same output as VCR SB)
0
0
(default)
1
0
1
1
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