PXB4340E Datasheet, PDF (70/185 Pages) Infineon Technologies AG – ICs for Communications

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Read Address 9D_H
Value after reset 0000_H

RXRCEL(15:8)

RXRCEL(7:0)
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RXRCEL(15:0)
Receive Cell Buffer access. A cell extracted or copied from the data
stream is transferred from the internal receive buffer to the
microprocessor by 27 read accesses of RXRCEL. The accesses need
not be consecutive; it is allowed to access other registers in between.
Received cell(s) are indicated with bit 9 of ISR0 set. After read-out of
the last cell ISR0(9) is reset by the AOP.
Cell format of the extracted cell is:
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1st access
2nd access
3rd access
4th access
:
:
27th access
Header octet 1
Header octet 3
UDF1(7:0)
Payload octet 1
:
:
Payload octet 47


Header octet 2
Header octet 4
76
UDF2(5:0)
Payload octet 2
:
:
Payload octet 48
The cell format is identical to the insertion cell format except the UDF2 octet:
Bit 7
Bit 6
UDF2(5:0)
UDF2(7) of the extracted cell (don’t care in case of 8-bit UTOPIA)
Source of the received cell (overwrites UDF2(6) of extracted/copied
cell) :
0
Cell from downstream direction
1
Cell from upstream direction
6 LSBs of the UDF2 octet of the extracted cell (don’t care in case of 8-
bit UTOPIA).
Data Sheet
3-70
04.2000