Texas Instruments TMS320DM648 Video Capture Channel a Control Register Vcactl, Description Bit

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Video Capture Registers

Table 3-14. Video Capture Channel x Status Register (VCxSTAT) Field Descriptions

					Description
Bit	field (1)	symval (1)	Value	BT.656 or Y/C Mode	Raw Data Mode	TCI Mode
31	FSYNC	OF(value)		Current frame sync bit.
		DEFAULT	0	VCOUNT = VINT1 or	Not used.	Not used.
		CLEARED		VINT2, as selected by
				the FSCL2 bit in
				VCxVINT.
		SET	1	VCOUNT = 1 in field	Not used.	Not used.
				1.
30	FRMC	OF(value)		Frame (data) captured bit. Write 1 to clear the bit, a write of 0 has no effect.
		DEFAULT	0	Complete frame has	Complete data block has	Entire data packet has not been
		NONE		not been captured.	not been captured.	captured.
		CAPTURED	1	Complete frame has	Complete data block has	Entire data packet has been
		CLEAR		been captured.	been captured.	captured.
29	F2C	OF(value)		Field 2 captured bit. Write 1 to clear the bit, a write of 0 has no effect.
		DEFAULT	0	Field 2 has not been	Not used.	Not used.
		NONE		captured.
		CAPTURED	1	Field 2 has been	Not used.	Not used.
		CLEAR		captured.
28	F1C	OF(value)		Field 1 captured bit. Write 1 to clear the bit, a write of 0 has no effect.
		DEFAULT	0	Field 1 has not been	Not used.	Not used.
		NONE		captured.
		CAPTURED	1	Field 1 has been	Not used.	Not used.
		CLEAR		captured.
27-16	VCYPOS	OF(value)	0-FFFh	Current VCOUNT	Upper 12 bits of the data	Upper 12 bits of the data
				value and the line that	counter.	counter.
				is currently being
				received (within the
				current field).
		DEFAULT	0
15-13	Reserved	-	0	Reserved. The reserved bit location is always read as 0. A value written to this field
				has no effect.
12	VCFLD	OF(value)		VCFLD bit indicates which field is currently being captured. The VCFLD bit is updated
				based on the field detection logic selected by the FLDD bit in VCACTL.
		DEFAULT	0	Field 1 is active.	Not used.	Not used.
		NONE
		DETECTED	1	Field 2 is active.	Not used.	Not used.
11-0	VCXPOS	OF(value)	0-FFFh	Current HCOUNT	Lower 12 bits of the data	Lower 12 bits of the data
				value. The pixel index	counter.	counter.
				of the last received
				pixel.
		DEFAULT	0

(1)For CSL implementation, use the notation VP_VCxSTAT_field_symval

3.13.2 Video Capture Channel A Control Register (VCACTL)

Video capture is controlled by the video capture channel A control register (VCACTL) shown in Figure 3-22and described in Table 3-15.

72 Video Capture Port SPRUEM1 –May 2007

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