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參數(shù)資料
| 型號： | AK4708EQ |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | AV SCART Switch with Two RGB Outputs |
| 中文描述： | 影音SCART開關(guān)與兩個(gè)RGB輸出 |
| 文件頁數(shù)： | 28/46頁 |
| 文件大小： | 504K |
| 代理商： | AK4708EQ |
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[AK4708]
MS0618-E-00
2007/04
- 28 -
5.
Monitor Options and INT function
■
Monitor Options (08H: D4-D0)
The AK4708 has several detection functions. SVCR1-0 bits, FVCR bit, VCMON bit and TVMON bit reflect the input
DC level of VCR slow blanking, the input DC level of VCR fast blanking and signals input to TVVIN or VCRVIN pins.
SVCR1-0: VCR Slow blanking status monitor
SVCR1-0 bits reflect the voltage at VCRSB pin only when the VCRSB is in the input mode.
When the VCRSB is in the output mode, SVCR1-0 bits hold previous value.
VCRSB pin input level
SVCR1 bit
< 2V
4.5 to 7V
(Reserved)
9.5 <
Table 24. VCR Slow Blanking monitor
FVCR: VCR Fast blanking input level monitor
This bit is enabled when TVFB bit = “1”.
VCRFB pin input level
< 0.4V
1V <
Table 25. VCR Fast Blanking monitor (Typical threshold is 0.7V)
VCMON: VCRVIN pin video input monitor (MCOMN bit = “1”),
TVVIN pin or VCRVIN pin video input monitor (MCOMN bit = “0”)
0: No video signal detected.
1: Detects video signal.
TVMON: TVVIN pin video input monitor (active when MCOMN bit = “1”)
0: No video signal detected.
1: Detects video signal.
AUTO
(00H D3)
(09H D7)
0
0
0
0
0
0
0
0
1
0
0
1
0
1
0
0
1
0
0
1
1
0
1
1
1
x
0
1
x
0
1
x
1
1
x
1
SVCR0 bit
0
1
0
1
0
0
1
1
FVCR bit
0
1
MCOMN
TVVIN signal
VCRVIN signal
TVMON
(08H D4)
0
0
0
0
0
0
1
1
0
0
0
0
VCMON
(08H D3)
0
1
1
1
0
1
0
1
0
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
x:don’t care
Note 24. TVVIN/VCRVIN signal: signal 0 = No signal applied, signal 1 = signal applied
Table 26. TV/VCR Monitor Function
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