参数资料
型号: CS4210
厂商: National Semiconductor Corporation
英文描述: IEEE 1394 OHCI Controller
中文描述: 1394 OHCI控制器
文件页数: 18/102页
文件大小: 1571K
代理商: CS4210
www.national.com
18
Revision 1.0
G
Operational Description
(Continued)
When the IntEvent.cycleInconsistent condition occurs, the
IT and IR DMA controllers continue processing running
contexts normally, except that contexts with the Context-
Control.cycleMatchEnable bit set remain inactive and
cycleMatch processing is, in effect, disabled. To re-enable
cycleMatch processing, software must first stop the IT and/
or IR contexts for which cycleMatch is enabled (by clearing
ContextControl.run and waiting for ContextControl.active to
clear, then clearing the IntEvent.cycleInconsistent interrupt
(read BAR0+Offset 84h[23]). The stopped IR contexts may
then be started. The stopped IT contexts may also be
started, but software should not schedule any transmits to
occur for these contexts for at least two cycles immediately
following the clearing of the interrupt condition.
Table 3-5 is a register format for the eight Isochronous
Transmit Context Control Set/Clear registers. Refer to Sec-
tion 4.4.26.1 "Isoch Transmit Context Control Register" on
page 84 for further register information.
Table 3-5.
IsochTx[7:0]ContextControl Set/Clear Register Formats
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
IsochTxnContextControl Set Register
IsochTxnContextControl Clear Register
c
cycleMatch
r
RSVD
w
d
a
RSVD
event code
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