pxf4336 Infineon Technologies Corporation, pxf4336 Datasheet - Page 110
pxf4336
Manufacturer Part Number
pxf4336
Description
Abm Premium Atm Buf Fer Manager
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PXF4336.pdf
(425 pages)
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3.5.2
Figure 3-47
Figure 3-47 ERC Unit
The central function blocks of the ERC sub-system are the processor running the ABR
state machines and the AVT context table storing all connection specific parameters.
The SCAN unit next to the AVT table enforces all time-out related parameters by
generating time-out notifications. During initialization, the Code RAM is loaded via the
SPI Interface from an external serial EEPROM device. This firmware is needed for ABR
ER and ABR VS/VD. Communication with the ABM-P core (RM cell insert/extract, queue
information, rate update messages, cell emit events) is handled by the message
interface. The ERC sub-system shares the Microprocessor Interface with the ABM-P
core. Communication with an external microprocessor (e.g. extended Context RAM
access) is performed via a mailbox while access to the main context table AVT is done
directly by the microprocessor through dedicated transfer registers.
Data Sheet
ext. EEPROM
ext. Context
Code RAM
RAM
RAM
SPI
ERC Unit Functional Overview
provides an overview of the ERC unit of the ABM-P:
Processor
110
(Context RAM)
Message
Interface
Mailbox
SCAN
AVT
(shared) uP-IF
Functional Description
ABM-P
Core
PXF 4336 V1.1
2001-12-17
ABM-P
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