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參數資料
| 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： | 50/114頁 |
| 文件大小： | 577K |
| 代理商： | MD8412B |
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MD8412B
38
FUJIFUILM MICRODEVICES CO., LTD.
Ver 1.10
tCode
: Transaction code field
This field is used to set up a transaction code. The transaction code is used to define the packet type. Refer to
Table 4-6-2 regarding setting values.
priorty
: priority field
This field is valid in the back plane environment. Therefore, the MD8412B is required to set up 0000b, with-
out fail.
destinationID
: destination ID field
This field is used to set up destination bus and node ID. The upper 10 bits out of the length of 16 bits are used
to set up the destination bus ID and the lower 6 bits are used to set up the destination physical ID. Some figures
in the setting value may have special meanings. Refer to Table 4-6-3 regarding details.
destinationOffset
: destination Offset Address Field
This field is used to define the lower 48-bit address of the destination node for the requested packet. The set-
ting value need be defined in the quadlet unit in the case of a read request for quadlet data and a write request
for quadlet data.
dataLength
: data length field
This field is used to set up data length for the blockData field. The maximum value of the setting value
depends on that of the speed field. Refer to Table 4-6-4 regarding details.
extended_tCode
: extended transaction code field
This field is used to define the extension tCode. This extended_tCode becomes valid only if tCode is "lock
request" or "lock response" For other tCodes, 0000h must be set in this register. Refer to Table 4-6-5 regarding
details.
blockDat
: block data field
This field is used to set up actual transfer data. If the DataLength field is not defined with a multiple of 4, this
field is required to be completed so that the quadlet unit is finished with 00h.
4-1-3
Quadlet Receive
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
destinationID
tLabel
rt
tCode
priority
sourceID
destinationOffset_H
destinationOffset_L
quadlet data (for write request and read response)
spd
ackSent
Table 4-1-3 Quadlet Receive format (Asynchronous)
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