402-00005-00
Registers
3–30
Rev 02; February 8, 2002
VTOTAL must be an odd number for non-interlaced frames.
VTOTAL
Function
0
0.5 lines per frame
1
1 line per frame
2
1.5 lines per frame
3
2 lines per frame
. . .
. . .
4095 (0xFFF)
2048 lines per frame
3.4.2.2 Vertical Sync Low Time (VSEND) R/W
VSEND defines the duration of the Programmable Timing Generator (PTG) vertical sync pulse. The 5-bit value is
the time vertical sync is low, in half lines. For RS170, Vsync is low for 3 lines. For CCIR Vsync is low for 2.5 lines.
Use the following formula to calculate VSEND:
VSEND = (number of lines in Vsync – 0.5) x 2
VSEND
Function
0
Vsync low = 0.5 line
1
Vsync low = 1 line
2
Vsync low = 1.5 lines
3
Vsync low = 2.0 lines
. . .
. . .
31 (0x1F)
Vsync low = 16 lines
3.4.2.3 Vertical Sync Polarity (VSYNCPOL) R/W
The VSYNCPOL bit defines the polarity of the vertical sync signal in internal timing mode (XTAL). The Vsync
output on the camera connector can be disabled by the VSYNCEN bit (INCON2 register). This bit is “don’t care” in
PLL modes.
VSYNCPOL
Function
0
Vsync is active low
1
Vsync is active high
3.4.2.4 E-Donpisha Mode Enable (EDONP) R/W
This bit enables the “E-Donpisha” or “Electronic Donpisha” mode, which changes the relationship between Vsync
and Frame Reset, to control the camera shutter and integration time for E–Donpisha II cameras. The TIMEMD bits
must select XTAL mode, SMODE must select non-interlaced, FRSTMD must enable Frame Reset mode, and the
FRSTONV bit must enable Frame Reset output on the VSYSNC connection.
The PCVisionplus frame reset line must be connected to the camera’s external trigger input. Following an external
trigger input to the PCVisionplus, the Frame Reset pulse drives the camera trigger. The length of the Frame Reset
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