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CHAPTER 4 ATM CELL PROCESSOR
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Preliminary User’s Manual S14767EJ1V0UM00
(3) Raw cell data
The following is the Raw cell data format in little endian mode.
Figure 4-43. Raw Cell Data Format
WORD0
CELL HEADER
WORD1
:
:
:
WORD12
BYTE2
BYTE1
BYTE0
HEC
BYTE46
BYTE45
BYTE44
BYTE43
WORD13
UINFO
0
BYTE47
WORD14
TIME STAMP
WORD15
1
VC NUMBER
CE
0
Cell Header
HEC
BYTE0 – BYTE47
UINFO
TIME STAMP
VC NUMBER
CE
:Header of the cell without HEC.
:HEC field pattern of the cell.
:Payload data of the cell.
:User information. The pattern which user set in UINFO field in VC table.
:A_TSR register value when ATM Cell Processor received the cell.
:VC Number of the cell.
:CRC-10 check result
0 : No error.
1 : CRC-10 error is detected.
4.8.3.3
Receiving indication
For each packet, ATM Cell Processor writes a receive indication as the reception completion status in the mailbox.
The mailbox used for reception is mailbox 0 and 1. More specifically, ATM Cell Processor writes a receive indication
once all data (including the trailer) has been stored into the receive buffer if the packet has been received normally;
when all data has been stored into the receive buffer if the packet received contains a "CRC-32" or "Length" error; and
when an error is detected if the error is other than a "CRC-32" or "Length" error.
A receive indication contains the start address and size of the batch that ATM Cell Processor uses to store the
packet, and other information. By reading the receive indication, the host can process the received packet.
The format of a receive indication is as follows: