AK4705 Datasheet, PDF (32/50 Pages) Asahi Kasei Microsystems – 2ch 24bit DAC with AV SCART Switch

[AK4705]
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
SVCR1
< 2V
0
4.5 to 7V
0
(Reserved)
1
9.5<
1
Table 26. VCR Slow Blanking monitor
SVCR0
0
1
0
1
FVCR: VCR Fast blanking input level monitor
This bit is enabled when TVFB bit = “1”.
VCRFB pin input level
FVCR
<0.4V
0
1 V<
1
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)
0
0
0
0
0
0
0
0
1
1
1
1
MCOMN
(09H D7)
0
0
0
0
1
1
1
1
x
x
x
x
TVVIN signal
0
0
1
1
0
0
1
1
0
0
1
1
VCRVIN signal
0
1
0
1
0
1
0
1
0
1
0
1
TVMON
(08H D4)
0
0
0
0
0
0
1
1
0
0
0
0
Note: 20. TVVIN/VCRVIN signal: 0 = No signal applied, 1 = signal applied
Table 28. TV/VCR Monitor Function
VCMON
(08H D3)
0
1
1
1
0
1
0
1
0
1
1
1
x: Don’t care
MS0451-E-01
- 32 -
2007/06