UPD64084 NEC, UPD64084 Datasheet - Page 47

• Manufacturer Part Number: UPD64084
• Description: THREE-DIMENSIONAL Y/C SEPARATION LSI WITH ON-CHIP MEMORY
• Manufacturer: NEC

08
SA
D7-D6
D5-D4
D3-D2
D1-D0
Bit
WSC
Specifies the amount of
noise detection coring.
VTRH
Specifies hysteresis for
horizontal sync
nonstandard signal
detection (out-of-
horizontal sync intra-field)
VTRR
Specifies sensitivity for
horizontal sync
nonstandard signal
detection (out-of-
horizontal sync intra-field)
LDSR
Specifies sensitivity for
frame sync nonstandard
signal detection (out-of-
horizontal sync inter-
frame)
Name and function
Table 15-2. Write Register Functions (7/14)
00: 0LSB (high detection sensitivity)
01: 1LSB
10: 2LSB
11: 3LSB (low detection sensitivity)
Specifies an input coring value for the noise detection circuit.
Detection results are not used within the device.
00: Hysteresis off (width of 0 clock pulses)
01: Low hysteresis (width of 2 clock pulses)
10: Medium hysteresis (width of 4 clock pulses)
11: High hysteresis (width of 6 clock pulses)
For horizontal sync nonstandard signal detection, a criterion
value to detect an out-of-horizontal sync state intra-field is
decreased by a value indicated above.
00: High detection sensitivity (width of ±4 clock pulses)
01: Medium detection sensitivity (width of ±8 clock pulses)
10: Low detection sensitivity (width of ±12 clock pulses)
11: Detection off
If the degree of out-of-horizontal sync state intra-field becomes
larger than specified, a horizontal sync nonstandard signal is
assumed to have been detected.
Horizontal sync nonstandard signal detection characteristic curve
00: High detection sensitivity (width of 0.5 clock pulses)
01: Medium detection sensitivity (width of 1 clock pulse)
10: Low detection sensitivity (width of 1.5 clock pulses)
11: Detection off
If the degree of out-of-horizontal sync state inter-frame becomes
larger than specified, a frame sync nonstandard signal is
assumed to have been detected.
Standard-to-nonstandard
Standard-to-nonstandard hysteresis width
decision criterion
(VTRR+1) 4(clk)
Data Sheet S16021EJ2V0DS
VTRH 2(clk)
Note 2
Note 1
Description
Note 1
Notes 1. clk is in 4f
2. Excluding when
VTRR = 11
OHSD=1 (nonstandard
signal detected)
OHSD=0 (standard
signal detected)
SC
units.
Typical
value
PD64084
01
01
01
10
Initial
value
01
01
01
10
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