Video Port/VCXO Interpolated Control (VIC) Port User's Guide

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3.13.7 Video Capture Channel x Vertical Interrupt Register (VCxVINT)
Video Capture Registers
The video capture channel x vertical interrupt register (VCAVINT, VCBVINT) controls the generation of
vertical interrupts in each field.
In BT.656 or Y/C mode, an interrupt can be generated upon completion of the specified line in a field (end
of line when VCOUNT = VINT n). This allows the software to synchronize to the frame or field. The
interrupt can be programmed to occur in one or both fields (or not at all) using the VIF1 and VIF2 bits. The
VINT n bits also determine when the FSYNC bit in VC xSTAT is cleared. If FSCL2 is 0, then the FSYNC bit
is cleared in field 1 when VCOUNT = VINT1; if FSCL2 is 1, then the FSYNC bit is cleared in field 2 when
VCOUNT = VINT2.
The video capture channel x vertical interrupt register (VCxVINT) is shown in Figure 3-27 and described in
Table 3-20 .
Figure 3-27. Video Capture Channel x Vertical Interrupt Register (VCxVINT)
31 30 29 28 27 16
VIF2 FSCL2 Reserved VINT2
R/W-0 R/W-0 R-0 R/W-0
15 14 12 11 0
VIF1 Reserved VINT1
R/W-0 R-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; - n = value after reset
Table 3-20. Video Capture Channel x Vertical Interrupt Register (VCxVINT) Field Descriptions
Description
Bit field
(1)
symval
(1)
Value BT.656 or Y/C Mode Raw Data Mode TCI Mode
31 VIF2 OF( value) Setting of VINT in field 2 enable bit.
DEFAULT 0 Setting of VINT in field 2 is Not used. Not used.
disabled.
DISABLE
ENABLE 1 Setting of VINT in field 2 is Not used. Not used.
enabled.
30 FSCL2 OF( value) FSYNC bit cleared in field 2 enable bit.
DEFAULT 0 FSYNC bit is not cleared. Not used. Not used.
NONE
FIELD2 1 FSYNC bit is cleared in field 2 Not used. Not used.
instead of field 1.
29-28 Reserved - 0 Reserved. The reserved bit location is always read as 0. A value written to this
field has no effect.
27-16 VINT2 OF( value) 0-FFFh Line that vertical interrupt Not used. Not used.
occurs if VIF2 bit is set.
DEFAULT 0
15 VIF1 OF( value) Setting of VINT in field 1 enable bit.
DEFAULT 0 Setting of VINT in field 1 is Not used. Not used.
disabled.
DISABLE
ENABLE 1 Setting of VINT in field 1 is Not used. Not used.
enabled.
14-12 Reserved - 0 Reserved. The reserved bit location is always read as 0. A value written to this
field has no effect.
11-0 VINT1 OF( value) 0-FFFh Line that vertical interrupt Not used. Not used.
occurs if VIF1 bit is set.
DEFAULT 0
(1)
For CSL implementation, use the notation VP_VC xVINT_ field_ symval
SPRUEM1 – May 2007 Video Capture Port 79
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