TSB41BA3APFP datasheet(61/66 Pages) TI

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TSB41BA3A

IEEE 1394b THREEPORT CABLE TRANSCEIVER/ARBITER

SLLS618B − JUNE 2004 − REVISED AUGUST 2004

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

PRINCIPLES OF OPERATION (1394B INTERFACE)

transmit (continued)

Table 37. Link Request Type Encoding During Packet Transmission

D1−D3

Request Type

000

No request

001

Isoch_Req_Odd

010

Isoch_Req_Even

011

Current

100

Next_Even

101

Next_Odd

110

Cyc_Start_Req

111

Reserved

Table 38. Link Request Speed Code Encoding During Packet Transmission

D5−D6

DATA RATE

S100

S200

S400

S800

Table 39. Link Request Format Encoding During Packet Transmission

FORMAT

Link does not request either beta or legacy packet format for bus transmission

Link requests beta packet format for bus transmission

Table 40. Subaction End Notification Encoding During Packet Transmission

DESCRIPTION

Transmitted packet does not represent end of a subaction

Transmitted packet marks the end of a subaction

The PHY indicates to the link during the GRANT cycle which type of grant is being issued. This indication

includes the grant type as well as the grant speed. The link uses the bus grant for transmitting the granted packet

type. The link transmits a granted packet type only if its request type exactly matches the granted speed and

the granted format.

Table 41. Format Type During Grant Cycle

D0 VALUE DURING GRANT

CYCLE

FORMAT

Unspecified

Beta format

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