Texas Instruments TMS320C64x DSP - Manual (Page 136)

Video Capture Registers
Video Capture Port 3-74 SPRU629
3.13.12 TSI Clock Initialization LSB Register (TSICLKINITL)
The transport stream interface clock initialization LSB register (TSICLKINITL)
is used to initialize the hardware counter to synchronize with the system time
clock. TSICLKINITL is shown in Figure 3–40 and described in Table 3–25.
On receiving the first packet containing a program clock reference (PCR) and
the PCR extension value, the DSP writes the 32 least-significant bits (LSBs)
of the PCR into TSICLKINITL. This initializes the counter to the system time
clock. TSICLKINITL should also be updated by the DSP whenever a disconti-
nuity in the PCR field is detected.
To ensure synchronization and prevent false compare detection, the software
should disable the system time clock interrupt (clear the STEN bit in TSICTL)
prior to writing to TSICLKINITL. All bits of the system time counter are initial-
ized whenever either TSICLKINITL or TSICLKINITM are written.
Figure 3–40. TSI Clock Initialization LSB Register (TSICLKINITL)
31 0
INPCR
R/W-0
Legend: R/W = Read/Write; -n = value after reset
Table 3–25. TSI Clock Initialization LSB Register (TSICLKINITL) Field Descriptions
Description
Bit Field symval † Value
BT.656, Y/C Mode,
or Raw Data Mode
TSI Mode
31–0 INPCR OF(value) 0–FFFF FFFFh Not used. Initializes the 32 LSBs of the
system time clock.
† For CSL implementation, use the notation VP_TSICLKINITL_INPCR_symval