cxd3220r Sony Electronics, cxd3220r Datasheet - Page 40

• Manufacturer Part Number: cxd3220r
• Description: Ieee1394 Link/transaction Layer Controller Lsi For Sbp-2
• Manufacturer: Sony Electronics

6-5-2. Asynchronous Receive
The following are the three basic formats for Asynchronous data during receive.
The names of received data areas and their contents are given below.
Asynchronous Receive Fields
a) No-data Packets (Used for Quadlet Read requests and all Write responses.)
b) Quadlet Packets (Used for Quadlet Write requests, Quadlet Read responses and Block Read requests.)
c) Block Packets (Used for Lock requests, Lock responses, Block Write requests and Block Read responses.)
destinationID
tLabel
rt
tCode
priority
sourceID
destinationOffsetHigh,
destinationOffsetLow
rCode
quadlet data
dataLength
extendedtCode
block data
spd
acksent
Field Name
This node's BusNumber (all "0" if "local bus") and NodeNumber
(all "1" if broadcast).
Transaction Label. Used as a pair with response packet relative to request packet.
This packet's Retry code.
This packet's Transaction code.
This packet's Priority level.
The Node ID of the node that sent this packet.
These two continuous areas indicate Destination Node address space address.
Response code for response packet.
Received data is written for Quadlet Write requests and quadlet read response.
The number of bytes in received block type's packet data.
Specifies actual Lock Action performed by this packet data when tCode is a Lock
Transaction.
Received data is written. This data is not written in FIFO when dataLength = 0. The
first byte of the block must indicate the upper byte of the first data, regardless of data
Destination or Source listing.
Speed of received packet.
Acknowledge code sent by Link Core relative to this packet is written.
00: Retry_1; 01: Retry_X, 10: Retry_A, 11: Retry_B
00: 100Mbps; 01: 200Mbps; 10: 400Mbps; 11: Reserved
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Description
CXD3220R