Texas Instruments TMS320C64x DSP Benutzerhandbuch
Video Capture Registers
Video Capture Port
3-80
SPRU629
3.13.18
TSI System Time Clock Compare Mask LSB Register (TSISTMSKL)
The transport stream interface system time clock compare mask LSB register
(TSISTMSKL) holds the 32 least-significant bits (LSBs) of the absolute time
compare mask (ATCM). This value is used with TSISTMSKM 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. TSISTMSKL is shown in Figure 3–46 and described in Table 3–31.
(TSISTMSKL) holds the 32 least-significant bits (LSBs) of the absolute time
compare mask (ATCM). This value is used with TSISTMSKM 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. TSISTMSKL is shown in Figure 3–46 and described in Table 3–31.
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 TSISTMSKL.
software should disable the system time clock interrupt (clear the STEN bit in
TSICTL) prior to writing to TSISTMSKL.
Figure 3–46. TSI System Time Clock Compare Mask LSB Register (TSISTMSKL)
31
0
ATCM
R/W-0
Legend: R/W = Read/Write; -n = value after reset
Table 3–31. TSI System Time Clock Compare Mask LSB Register (TSISTMSKL)
Field Descriptions
Description
Bit
Field
symval
†
Value
BT.656, Y/C Mode,
or Raw Data Mode
or Raw Data Mode
TSI Mode
31–0
ATCM
OF(value)
0–FFFF FFFFh
Not used.
Contains the 32 LSBs of the
absolute time compare mask.
absolute time compare mask.
† For CSL implementation, use the notation VP_TSISTMSKL_ATCM_symval