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參數(shù)資料
| 型號(hào)： | 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)： | 48/114頁 |
| 文件大?。?/td> | 577K |
| 代理商： | MD8412B |
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MD8412B
36
FUJIFUILM MICRODEVICES CO., LTD.
Ver 1.10
4
Data Format
4-1
Asynchronous
4-1-1
Quadlet Transmit
BusID
: Bus ID Field
This field is used to select the BusID that has been set in the source area of the header area in the IEEE1394
packet format, in order to determine whether register setting of the MD8412B should be made valid or 3FF
fixed.
0
= BusID is selected to make the set value valid in the MD8412B register.
1
= BusID is made 3FF fixed.
When this bit is set at 1, the BusID register setting becomes invalid in the MD8412B.
spd
: speed field
This field is used to designate the transfer speed. Refer to Table 4-6-6 regarding setting values.
tLabel
: Transaction label field
This field is used to define a unique tag for each transferred transaction. The tLabel sent for requesting is
used as a transaction label for correct response. The values used are valid in the range of 0h~Fh.
rt
: retry field
This field is used to define whether this packet is in the middle of making a retry. The retry protocol is fol-
lowed by the destination node. Refer to Table 4-6-1 regarding setting values.
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.
priority
: 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 IDfield
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.
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
B
spd
tLabel
rt
tCode
priority
destinationID
destinationOffset_H
destinationOffset_L
quadlet data (for write request and read response)
Table 4-1-1 Quadlet Transmit format (Asynchronous)
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