參數(shù)資料
型號(hào)： AK4705
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)： 32/50頁(yè)
文件大小： 660K
代理商： AK4705
[AK4705]
MS0451-E-01
2007/06
- 32 -
5. Monitor Options and INT function
■
Monitor Options (08H: D4-D0)
The AK4705 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 reflect the voltage at VCRSB pin only when the VCRSB pin is in the input mode.
When the VCRSB is in the output mode, SVCR1-0 hold previous value.
VCRSB pin input level
< 2V
4.5 to 7V
(Reserved)
9.5<
Table 26. 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
1 V<
Table 27. 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”. AK4704 compatible.)
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
SVCR1
0
0
1
1
SVCR0
0
1
0
1
FVCR
0
1
MCOMN
TVVIN signal
VCRVIN signal
TVMON
(08H D4)
0
0
0
0
VCMON
(08H D3)
0
1
1
1
0
1
0
1
0
1
0
1
0
0
1
1
0
1
0
1
0
1
0
1
0
0
0
0
0
1
1
1
x: Don’t care
Note: 20. TVVIN/VCRVIN signal: 0 = No signal applied, 1 = signal applied
Table 28. TV/VCR Monitor Function
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