PCVisionplus
Hardware Reference
Registers
3–53
Rev 02; February 8, 2002
3.4.10 Software Trigger (SOFTTRIG) W-O
0
7
BADR2 + 0x28
DATA7
DATA6
DATA5
DATA4
DATA3
DATA2
DATA1
DATA0
8
15
DATA15
DATA14
DATA13
DATA12
DATA11
DATA10
DATA9
DATA8
PCP_SOFTTRIG_32
16
23
DATA23
DATA22
DATA21
DATA20
DATA19
DATA18
DATA17
DATA16
24
31
DATA31
DATA30
DATA29
DATA28
DATA27
DATA26
DATA25
DATA24
Writing any value to this register starts a triggered acquire cycle when TRIGEN is enabled and TRIGSEL selects
software trigger. This register is write only.
3.4.11 Programmable Clamp (PCLAMP) R/W
0
7
BADR2 + 0x2C
BPSTRT6
BPSTRT5
BPSTRT4
BPSTRT3
BPSTRT2
BPSTRT1
BPSTRT0
CLMPSRC
8
15
BPEND7
BPEND6
BPEND5
BPEND4
BPEND3
BPEND2
BPEND1
BPEND0
PCP_PCLAMP_32
16
23
NO
NO
NO
NO
NO
NO
NO
NO
24
31
Reserved
Reserved
Reserved
CNTEN
NO
NO
NO
NO
SRC
CLAMP10
CLAMP9
CLAMP8
CLAMP11
CLAMP0
CLAMP1
CLAMP2
CLAMP3
CLAMP4
CLAMP5
CLAMP6
CLAMP7
This register contains bits to control the clamp pulse generator used for DC restoration of the incoming video. The
sync stripper clamp is only available for PLL mode. Programmable clamp is recommended for all modes because it
gives a better clamp response time.
Bit
Mnemonic
Function
0
CLMPSRC
Clamp Pulse Source
1–7
BPSTRT
Back Porch Start Position
8–15
BPEND
Back Porch End Position
16–27
NOCLAMP
No Clamp Region
28
CNTENSRC
Clamp Counter Enable Source
29–31
Reserved
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