ml87v21071 Oki Semiconductor, ml87v21071 Datasheet - Page 80

• Manufacturer Part Number: ml87v21071
• Description: Video Signal Noise Reduction Ic With A Built-in Frame Memory
• Manufacturer: Oki Semiconductor

2.2.2 Input System Memory Control Mode Setting
OKI Semiconductor
SUB_ADDRESS = 42h(W/R): Input system memory control mode setting
Register name
IVSINV Initial value: 0; Setting range: 0 to 1
IHSINV Initial value: 0; Setting range: 0 to 1
IFINV Initial value: 0; Setting range: 0 to 1
IFLS Initial value: 0; Setting range: 0 to 1
DATA_BIT
Sets input polarity (timing edge) of input system vertical synchronization signal (IVS).
The IC operates with the fall of IVS positive polarity as a reference. However, in case the IVS input is of
negative polarity, it is possible to match the polarity reference such as the rise of positive polarity.
Sets input polarity (timing edge) of input system horizontal synchronization signal (IHS).
The IC operates with the rise of IHS positive polarity as a reference. However, if the IHS input is of
negative polarity, it is possible to match the polarity reference such as making the fall of positive
polarity.
Sets the polarity of input system detection field pulse.
Sets input system field decision mode selection.
Table R2-2-2 (3) Polarity Setting of Input System Detection Field Pulse
Table R2-2-2 (4) Input System Field Decision Mode Selection Setting
IHSINV
IVSINV
0
1
0
1
FCON
BIT7
Table R2-2-2 (2) IHS Input Polarity (Edge) Setting
Table R2-2-2 (1) IVS Input Polarity (Edge) Setting
(Reserved) (Reserved)
Positive polarity (Rise)
Positive polarity (Fall)
Negative polarity (Rise)
Negative polarity (Fall)
BIT6
IFINV
IFLS
IVS input polarity 1
IHS input polarity 1
0
1
0
1
BIT5
Decision result inversion
Detection field pulse
Detection field pulse
0.5H pulse decision
Decision result
IHS decision
IVEM
BIT4
Negative polarity (Rise)
BIT3
IFLS
Negative polarity (Fall)
Positive polarity (Rise)
Positive polarity (Fall)
IVS input polarity 2
IHS input polarity 2
IFINV
BIT2
IHSINV
BIT1
PEDL87V21071-01
ML87V21071
IVSINV
BIT0
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