Texas Instruments TMS320DM648 manual TCI System Time Clock MSB Register Tcistclkm, Pcre Pcrm

Models: TMS320DM648

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Figure 3-34. TCI System Time Clock LSB Register (TCISTCLKL)

31

0

PCR

R/W-0

LEGEND: R/W = Read/Write; R = Read only; -n= value after reset

Table 3-27. TCI System Time Clock LSB Register (TCISTCLKL) Field Descriptions

 

 

 

 

Description

Bit

field

symval (1)

Value

BT.656, Y/C Mode, or Raw Data Mode

TCI Mode

31-0

PCR

OF(value)

0-FFFF FFFFh

Not used.

Contains the 32 LSBs of the program

 

 

 

 

 

clock reference.

 

 

DEFAULT

0

 

 

(1)For CSL implementation, use the notation VP_TCISTCLKL_PCR_symval

3.13.15 TCI System Time Clock MSB Register (TCISTCLKM)

The transport stream interface system time clock MSB register (TCISTCLKM) 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 TCISTCLKM and TCISTCLKL.

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-μHz rate (every 26 hours).

The TCI system time clock MSB register (TCISTCLKM) is shown in Figure 3-35and described in Table 3-28.

Figure 3-35. TCI System Time Clock MSB Register (TCISTCLKM)

31

 

 

 

16

 

 

 

Reserved

 

 

 

 

R-0

 

15

10

9

1

0

 

Reserved

 

PCRE

PCRM

 

R-0

 

R/W-0

R/W-0

LEGEND: R/W = Read/Write; R = Read only; -n= value after reset

Table 3-28. TCI System Time Clock MSB Register (TCISTCLKM) Field Descriptions

 

 

 

 

 

Description

 

field (1)

symval (1)

 

BT.656, Y/C Mode, or Raw Data

TCI Mode

Bit

Value

Mode

 

31-10

Reserved

-

0

Reserved. The reserved bit location is always read as 0. A 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.

 

 

DEFAULT

0

 

 

0

PCRM

OF(value)

0-1

Not used.

Contains the MSB of the program

 

 

 

 

 

clock reference.

 

 

DEFAULT

0

 

 

(1)For CSL implementation, use the notation VP_TCISTCLKM_field_symval

SPRUEM1 –May 2007

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Texas Instruments TMS320DM648 manual TCI System Time Clock MSB Register Tcistclkm, Pcre Pcrm, Default Pcrm