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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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CS4210 датащи(PDF) 20 Page - National Semiconductor (TI) |
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CS4210 датащи(HTML) 20 Page - National Semiconductor (TI) |
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20 / 102 page  www.national.com 20 Revision 1.0 Operational Description (Continued) Table 3-7. Packet Event Codes Code Name DMA Description 00h evt_no_status AT, AR, IT, IR No event status. 001h Reserved -- Reserved 02h evt_long_packet IR The received data length was greater than the buffer’s data_length. 03h evt_missing_ack AT A subaction gap was detected before an ack arrived or the received ack had a parity error. 04h evt_underrun AT, IT Underrun on the corresponding FIFO. The packet was truncated. 05h evt_overrun IR A receive FIFO overflowed during the reception of an isochronous packet. 06h evt_descriptor_read AT, AR, IT, IR An unrecoverable error occurred while the CS4210 was reading a descriptor block. 07h evt_data_read AT, IT An error occurred while the CS4210 was attempting to read from host memory in the data stage of descriptor processing. 08h evt_data_write AR, IR, IT An error occurred while the CS4210 was attempting to write to host memory either in the data stage of descriptor processing (AR, IR), or when processing a single 16-bit host memory write (IT). 09h evt_bus_reset AR Identifies a CS4103 packet in the receive buffer as being the synthesized bus reset packet. (See Section 3.8 "Bus Resets" on page 30.) 0Ah evt_timeout AT Indicates that the asynchronous transmit response packet expired and was not transmit- ted. 0Bh evt_tcode_err AT, IT A bad tCode is associated with this packet. The packet was flushed. 0Ch-0Dh Reserved -- Reserved 0Eh evt_unknown AT, AR, IT, IR An error condition has occurred that cannot be represented by any other event codes defined herein. 0Fh evt_flushed AT Sent by the link side of the output FIFO when asynchronous packets are being flushed due to a bus reset. 10h Reserved --- Reserved for definition by future 1394 standards. 11h ack_complete AT, AR, IT, IR For asynchronous request and response packets, this event indicates the destination 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 follows. The event code for transmitted CS4103, isochronous, asynchronous stream and broadcast packets, none of which yields a 1394 ack code, are set by hardware to ack_complete unless an event occurs. 12h ack_pending AT, AR The destination node has successfully accepted the packet. If the packet was a request subaction, a response subaction follows at a later time. This code is not returned for a response subaction. 13h Reserved --- Reserved for definition by future 1394 standards. 14h ack_busy_X AT The packet could not be accepted after max ATRetries (see Section 4.4.3 "ATRetries Register" on page 59) attempts, and the last ack received was ack_busy_X. 15h ack_busy_A AT The packet could not be accepted after max ATRetries (see Section 4.4.3 "ATRetries Register" on page 59) attempts, and the last ack received was ack_busy_A. 16h ack_busy_B AT The packet could not be accepted after max AT Retries (see Section 4.4.3 "ATRetries Register" on page 59) attempts, and the last ack received was ack_busy_B. 17h-1Ah Reserved Reserved for definition by future 1394 standards. 1Bh ack_tardy AT The destination node could not accept the packet because the link and higher layers are in a suspended state. 1Ch Reserved --- Reserved for definition by future 1394 standards. 1Dh ack_data_error AT, IR The destination 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 data_length field. This code is not returned for any packet that does not have a data block payload. 1Eh ack_type_error AT, AR 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). 1Fh Reserved --- Reserved for definition by future 1394 standards. |
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