Texas Instruments TMS320C64x DSP Benutzerhandbuch
Video Capture Registers
3-77
Video Capture Port
SPRU629
3.13.15
TSI System Time Clock MSB Register (TSISTCLKM)
The transport stream interface system time clock MSB register (TSISTCLKM)
contains the most-significant bit (MSB) of the program clock reference (PCR)
and the 9 bits of the PCR extension. The system time clock value is obtained
by reading TSISTCLKM and TSISTCLKL. TSISTCLKM is shown in
Figure 3–43 and described in Table 3–28.
contains the most-significant bit (MSB) of the program clock reference (PCR)
and the 9 bits of the PCR extension. The system time clock value is obtained
by reading TSISTCLKM and TSISTCLKL. TSISTCLKM is shown in
Figure 3–43 and described in Table 3–28.
The PCRE value changes at a 27-MHz rate and is probably not reliably read
by the DSP. The PCRM bit normally changes at a 10.5-
by the DSP. The PCRM bit normally changes at a 10.5-
µ
Hz rate (every
26 hours).
Figure 3–43. TSI System Time Clock MSB Register (TSISTCLKM)
31
16
Reserved
R-0
15
10
9
1
0
Reserved
PCRE
PCRM
R-0
R/W-0
R/W-0
Legend: R = Read only; R/W = Read/Write; -n = value after reset
Table 3–28. TSI System Time Clock MSB Register (TSISTCLKM) Field Descriptions
Description
Bit
field
†
symval
†
Value
BT.656, Y/C Mode,
or Raw Data Mode
or Raw Data Mode
TSI Mode
31–10
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.
9–1
PCRE
OF(value)
0–1FFh
Not used.
Contains the extension portion of the
program clock reference.
program clock reference.
0
PCRM
OF(value)
0–1
Not used.
Contains the MSB of the program clock
reference.
reference.
† For CSL implementation, use the notation VP_TSISTCLKM_field_symval