MB86613S Datasheet, PDF (122/134 Pages) Fujitsu Component Limited. – IEEE1394 Open HCI Controller

Preliminary
8.4.2. Descriptor
This section describes the format of descriptor processed by IR- CPC. The descriptor(s) that IR- CPC han-
dles are INPUT_MORE command and INPUT_LAST command.
cmd _s key
=2
=0
ib w
reqCount
dataAddress
branchAddress
Z
xferStatus
resCount
Fig. 8.19 INPUT_MORE descriptor Format
cmd _s key
=3
=0
ib w
reqCount
dataAddress
branchAddress
Z
xferStatus
resCount
Bit size Field Name
----- --------------
4
cmd
Fig. 8.20 INPUT_LAST descriptor Format
description
-----------------------------------------------------------
”2h” means ”INPUT_MORE” command.
”3h” means ”INPUT_LAST” command.
1
s
This flag is valid only for packet- per- buffer mode.
”1b” stores the result of execution in the xferStatus and resCount fields.
”0b” does not store the result of execution in the xferStatus and resCount fields.
3
key
Always set ”0h”.
2
i
This field controls the interrupt event (IntEvent.IsochRx bit) reported after the
descriptor is processed.
”11b” makes to report the interrupt.
”00b” does not report the interrupt.
”10b” and ”01b” are unspecified codes.
In packet- per- buffer mode, only the ” i ” field of INPUT_LAST command is valid.
2
b
For buffer- fill mode:
Always set ”11b”.
For packet- per- buffer mode :
Set ”00b” for INPUT_MORE command.
Set ”11b” for INPUT_LAST command.
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