PDI1394L40 查看數據表（PDF） - Philips Electronics

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PDI1394L40

1394 enhanced AV link layer controller

Philips Electronics 

Philips Semiconductors

1394 enhanced AV link layer controller

Preliminary specification

PDI1394L40

Table 4. Acknowledge codes

Code

Name

Description

0001

ack_complete

The node has successfully accepted the packet. If the packet was a request subaction, the

destination node has successfully completed the transaction and no response subaction shall follow.

0010

ack_pending

The node has successfully accepted the packet. If the packet was a request subaction, a response

subaction will follow at a later time. This code shall not be returned for a response subaction.

0100

ack_busy_X

The packet could not be accepted. The destination transaction layer may accept the packet on a

retry of the subaction.

0101

ack_busy_A

The packet could not be accepted. The destination transaction layer will accept the packet when the

node is not busy during the next occurrence of retry phase A.

0110

ack_busy_B

The packet could not be accepted. The destination transaction layer will accept the packet when the

node is not busy during the next occurrence of retry phase B.

1101

ack_data_error

The node could not accept the block packet because the data field failed the CRC check, or because

the length of the data block payload did not match the length contained in the dataLength field. This

code shall not be returned for any packet that does not have a data block payload.

1110

ack_type_error

A field in the request packet header was set to an unsupported or incorrect value, or an invalid

transaction was attempted (e.g., a write to a read-only address).

0000, 0011,

0111 – 1100,

and 1111

reserved

This revision of the AV Link will not generate other acknowledge codes, but may receive them from

newer (1394a-2000) links. In that case, these new values will show up here.

2000 Dec 15

33

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