參數(shù)資料
型號： MD8412B
廠商： Electronic Theatre Controls, Inc.
英文描述： LINK(IEEE 1394)
中文描述： 鏈接（1394）
文件頁數(shù)： 30/114頁
文件大?。?/td> 577K
代理商： MD8412B
MD8412B
18
FUJIFUILM MICRODEVICES CO., LTD.
Ver 1.10
0110
0111~1100 = Reserve
1101
1110
1111
For the packet sent from the transmitter during transmission, contents of Acknowledge (Ack code) returned
from the destination node are reflected in this register. The reflection timing is when a busy flag for showing the
packet being processed in the transmitting asynchronous buffer is negated. This value is held until this Busy is
negated for the next packet transmission.
= ack_busy_B
= ack_data_error
= ack_type_error
= Reserve
Bit 13~12
AckStatus
: Ack Status bit (R- Initial value: 00b)
= Normal reception
= Parity error
= Packet lost (indicating that no Acknowledge packet has been sent in the specified time)
= Reserve
For the transmitted Asynchronous packet, the status of Acknowledge packet returned from the destination
node is indicated.
00
01
10
11
Bit 15
RetryTimeMax
: Retry Time Max bit (R- Initial value: 0b)
= Normal
= Max. number of retries
This bit is used to indicate the situation in regard to the maximum number of retries for the retry count setting
in the ATRetry register at the beginning of a certain retry phase. Whether the said retry phase has been finished
or is still busy at that time can be identified with the ATAck bit. This value is maintained until the next packet
transmission is carried out.
0
1
Bit 24
ATBusy
: AT Busy bit (R- Initial value: 0b)
= Indicates that ATGo issuing is possible.
= Indicates that ATGo issuing is impossible, and that a packet is presently being processed for the pre-
viously issued ATGo.
This bit is asserted upon the issuing of ATGo for Asynchronous transmission. It is negated when return of
this Acknowledge has been set in the ATAck register. The host cannot issue the next ATGo while this bit is
being asserted. Even though it is attempted, it is disregarded. When a packet transmission turns to be a retry
operation, this bit is never negated until the said Retry is finished.
0
1
Bit 25
ITBusy
: IT Busy bit (R- Initial value: 0b)
= Indicates that ITGo issuing is possible.
= Indicates that ITGo issuing is impossible, and that a packet is presently being processed for the previ-
ously issued ITGo.
For isochronous transmission in normal IsoMode, this bit is asserted with ITGo issued, and negated upon
completion of packet transmission. The host cannot issue the next ITGo until this bit is being asserted. Even
though it is attempted, it is disregarded.
0
1
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