MB86613S Datasheet, PDF (108/134 Pages) Fujitsu Component Limited. – IEEE1394 Open HCI Controller

Preliminary
cmd
=1
key
=2
p
i b3
reqCount
branchAddress
Z
xferStatus
timeStamp
first quadlet
second quadlet
third quadlet
fourth quadlet
Fig. 8.6 OUTPUT_LAST_Immediate descriptor Format
Bit size Field Name
----- --------------
4
cmd
description
-----------------------------------------------------------
”0h” means ”MORE” command.
”1h” means ”LAST” command.
3
key
”0h” means ”not immediate” command.
”2h” means ”immediate” command.
1
p
”1b” at this bit means the transmit packet is ping packet.
This bit is used to count the time until the selfID packet or acknowledge, or the
time until the subaction gap is detected after transmitting a packet. The
time is counted in 50MHz and the counted time is indicated in timeStamp
field.
2
i
This field is valid only for OUTPUT_LAST and OUTPUT_LAST__Immediate
commands.
It controls the interrupt event (IntEvent.reqTxComplete or .respTxComplete bit)
reported after the descriptor is processed.
”11b” makes to report the interrupt.
”01b” enables the interrupt report only when the acknowledge except for ack_
complete and ack_pending is received.
”00b” does not report the interrupt.
”10b” is an unspecified code.
2
b
Set ”00b” for MORE command.
Set ”11b” for LAST command.
16
reqCount
For OUTPUT_MORE and OUTPUT_LAST commands:
Set the data byte count to be stored from a host memory into the
AT- FIFO.
For OUTPUT_MORE_Immediate and OUTPUT_LAST_Immediate
commands:
Set the byte count of packet header.
32
dataAddress
Set the start address of host memory where data to be stored in AT- FIFO are in.
107