Table 9−2. Isochronous Receive Digital Video Enhancements Register Description (Continued)

BIT

FIELD NAME

TYPE

DESCRIPTION

 

 

 

 

7−6

RSVD

R

Reserved. Bits 7 and 6 return 0s when read.

 

 

 

 

5

DV_Branch1

RSC

When bit 5 is set to 1, the isochronous receive context 1 synchronizes reception to the DV frame start

 

 

 

tag in bufferfill mode if input_more.b = 01b, and jumps to the descriptor pointed to by frameBranch if

 

 

 

a DV frame start tag is received out of place. This bit is only interpreted when bit 4 (CIP_Strip1) is set

 

 

 

to 1 and bit 30 (isochHeader) in the isochronous receive context control register at OHCI offset

 

 

 

420h/424h (see Section 8.44) is cleared to 0.

 

 

 

 

4

CIP_Strip1

RSC

When bit 4 is set to 1, the isochronous receive context 1 strips the first two quadlets of payload. This

 

 

 

bit is only interpreted when bit 30 (isochHeader) in the isochronous receive context control register at

 

 

 

OHCI offset 420h/424h (see Section 8.44) is cleared to 0.

 

 

 

 

3−2

RSVD

R

Reserved. Bits 3 and 2 return 0s when read.

 

 

 

 

1

DV_Branch0

RSC

When bit 1 is set to 1, the isochronous receive context 0 synchronizes reception to the DV frame start

 

 

 

tag in bufferfill mode if input_more.b = 01b and jumps to the descriptor pointed to by frameBranch if

 

 

 

a DV frame start tag is received out of place. This bit is only interpreted when bit 0 (CIP_Strip0) is set

 

 

 

to 1 and bit 30 (isochHeader) in the isochronous receive context control register at OHCI offset

 

 

 

400h/404h (see Section 8.44) is cleared to 0.

 

 

 

 

0

CIP_Strip0

RSC

When bit 0 is set to 1, the isochronous receive context 0 strips the first two quadlets of payload. This

 

 

 

bit is only interpreted when bit 30 (isochHeader) in the isochronous receive context control register at

 

 

 

OHCI offset 400h/404h (see Section 8.44) is cleared to 0.

 

 

 

 

9−3

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Texas Instruments PCI7421, PCI7411 Reserved. Bits 7 and 6 return 0s when read, 420h/424h see .44 is cleared to, CIPStrip1