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| 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)： | 26/114頁 |
| 文件大?。?/td> | 577K |
| 代理商： | MD8412B |
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MD8412B
14
FUJIFUILM MICRODEVICES CO., LTD.
Ver 1.10
By the above-mentioned two setting values, the transmission buffer size is defined as:
ATansmitBufferSize = ATotalSize - ARxBufferSize
3-2-6
Isochronous Buffer Size Set Register
Index
14h
Initial value
007F 00FFh
In this register, an assignment size is specified to assign an isochronous area to the internal buffer having a 2KB capacity.
This size is specified in the Quadlet unit. Max configuration size is 511Quadlet.
Bit 8~0
ITotalSize
: Isochronous Total Buffer bit (RW- Initial value: 0FFh)
All buffer sizes for isochronous transmission and reception are specified in the Quadlet unit. When IsoMode
is
"011"
however, transmission buffer is lost and setting is made in the receiving buffer for two channels.
Bit 24~16
IRxBufferSize
: Isochronous Receive Buffer Size bit (RW- Initial value: 07Fh)
Buffer size for isochronous reception is specified in the Quadlet unit. In this case, this value must always be
smaller than the one set by TotalSize. If this value is changed, all data remaining in the isochronous transmis-
sion/reception buffer are abandoned.
If IsoMode is not
"
011
"
the transmission buffer size is defined as follows by the above-mentioned two setting
values:
ITansmitBufferSize = ITotalSize - IRxBufferSize
When IsoMode is
"
011b
"
contents of the Isochronous Configuration 3 register are stored in the buffer being
set by the IRxBufferSize, and contents of the Isochronous Configuration 2 register are stored in the buffer being
set by the ITransmitBufferSize.
When IsoMode is
"
101b
"
ITotalSize and IRxBufferSize must be set at the same value.
7
6
5
4
3
2
1
0
ITotalSize
15
14
13
12
11
10
9
8
ITotalSize
23
22
21
20
19
18
17
16
IRxBufferSize
31
30
29
28
27
26
25
24
IRxBufferSize
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