pxb4340e Infineon Technologies Corporation, pxb4340e Datasheet - Page 67

• Manufacturer Part Number: pxb4340e
• Description: Atm Oam Processor Aop
• Manufacturer: Infineon Technologies Corporation

These registers are used to insert ATM cells into the cell stream and to extract or copy cells from
the cell stream. For the insertion one set of 27 registers (TXR0...TXR26) is provided capable of
storing a complete ATM cell in UTOPIA cell format. When assembled the ATM cell is inserted
into either up- or downstream data stream via the command register TMCR. For cell extraction/
copy an internal 12-cell receive buffer is provided. A non-empty receive buffer is signalled via bit
9 of interrupt status register ISR0. Cells are read from the internal receive buffer by repeated
reading of the RXRCEL register.
Read/write Address 80
Value after reset 0000
Header octets 1..4 as well as UDF1 and UDF2 octets are mapped transparently to the cell. The
only field which is interpreted by the AOP is PN(4:0); it selects the (internal) PHY port number
the cell is destined to. For the determination of the UTOPIA port number and header formats see
Data Sheet
80
81
82
TXR0
TXR1
TXR2
. In case of 8-bit UTOPIA PN(4:0) is evaluated but not transferred to the data stream.
H
(for all)
H
...82
H
Header octet 1
Header octet 3
UDF1(7:0)
3-67
UDF2(7:5)
Header octet 2
Header octet 4
PN(4:0)
04.2000