Texas Instruments TMS320C64x DSP Benutzerhandbuch
Video Capture Registers
3-81
Video Capture Port
SPRU629
3.13.19
TSI System Time Clock Compare Mask MSB Register (TSISTMSKM)
The transport stream interface system time clock compare mask MSB register
(TSISTMSKM) holds the most-significant bit (MSB) of the absolute time
compare mask (ATCM). This value is used with TSISTMSKL to mask out bits
during the comparison of the ATC to the system time clock for absolute time.
The bits that are set to one mask the corresponding ATC bits during the
compare. TSISTMSKM is shown in Figure 3–47 and described in Table 3–32.
(TSISTMSKM) holds the most-significant bit (MSB) of the absolute time
compare mask (ATCM). This value is used with TSISTMSKL to mask out bits
during the comparison of the ATC to the system time clock for absolute time.
The bits that are set to one mask the corresponding ATC bits during the
compare. TSISTMSKM is shown in Figure 3–47 and described in Table 3–32.
To prevent inaccurate comparisons caused by changing register bits, the
software should disable the system time clock interrupt (clear the STEN bit in
TSICTL) prior to writing to TSISTMSKM.
software should disable the system time clock interrupt (clear the STEN bit in
TSICTL) prior to writing to TSISTMSKM.
Figure 3–47. TSI System Time Clock Compare Mask MSB Register (TSISTMSKM)
31
1
0
Reserved
ATCM
R-0
R/W-0
Legend: R = Read only; R/W = Read/Write; -n = value after reset
Table 3–32. TSI System Time Clock Compare Mask MSB Register (TSISTMSKM)
Field Descriptions
Description
Bit
Field
symval
†
Value
BT.656, Y/C Mode,
or Raw Data Mode
or Raw Data Mode
TSI Mode
31–1
Reserved
–
0
Reserved. The reserved bit location is always read as 0. A
value written to this field has no effect.
value written to this field has no effect.
0
ATCM
OF(value)
0–1
Not used.
Contains the MSB of the absolute time
compare mask.
compare mask.
† For CSL implementation, use the notation VP_TSISTMSKM_ATCM_symval