pxf4336 Infineon Technologies Corporation, pxf4336 Datasheet - Page 203

• Manufacturer Part Number: pxf4336
• Description: Abm Premium Atm Buf Fer Manager
• Manufacturer: Infineon Technologies Corporation

Register 8
•
CPU Accessibility:
Reset Value:
Offset Address:
Typical Usage:
Bit
Bit
•
AAL5EN
PLENGTH(14:0)
Data Sheet
AAL5EN
15
7
UA5TXCMD/DA5TXCMD
Upstream/Downstream AAL5 Transmit Command Registers
14
AAL5 Segmentation Enable
This bit enables AAL5 segmentation process accompanied by the
payload length octet counter PLENGTH:
’0’
’1’
Payload Length Octet Counter
This bit field represents the number of PDU payload octets for the
current packet and is equal to the CPCS-SDU length field which is
automatically inserted in the PDU trailer (last cell of the packet).
The ABM-P uses this counter value to control the AAL5
segmentation process.
Note: The maximum supported CPCS-SDU length is 32767 octets.
6
Read/Write
0000
UA5TXCMD
Written by CPU (write only, read always returns 0000)
H
13
5
AAL5 segmentation is disabled. Payload data octets
written to the cell transmit data registers are ignored.
Note: Setting AAL5EN=’0’ during an active packet
AAL5 segmentation is enabled. Payload data octets
written to the cell transmit data registers are processed
and the CPCS-PDU trailer is automatically appended in
the last cell controlled by the payload length octet
counter.
segmentation process leads to an abort of the
packet, i.e. the current cell is inserted with
PT(0)=’1’ (End of Packet indication) and CPCS-
SDU Length field of the trailer set to 0.
To abort it is recommended to write all 0 to the
register: AAL5EN | PLENGTH(14:0) = 0000
0A
PLENGTH(7:0)
12
4
H
203
PLENGTH(14:8)
11
3
DA5TXCMD
10
2
Register Description
PXF 4336 V1.1
9
1
1A
H
2001-12-17
ABM-P
H
8
0