PXB 4220 E V3.4-G Infineon Technologies, PXB 4220 E V3.4-G Datasheet - Page 120
PXB 4220 E V3.4-G
Manufacturer Part Number
PXB 4220 E V3.4-G
Description
IC ATM/IP INTERWORKING BGA-256
Manufacturer
Infineon Technologies
Datasheet
1.PXB4220E-V33.pdf
(290 pages)
Specifications of PXB 4220 E V3.4-G
Applications
*
Mounting Type
Surface Mount
Package / Case
256-BGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
PXB4220EV3.4X
PXB4220EV34GXP
SP000017873
PXB4220EV34GXP
SP000017873
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IWE8, V3.4
PXB 4219E, PXB 4220E, PXB 4221E
Memory Structure
The external RAM is organized as a 64k x 32 bit parity protected memory.
Accesses to internal configuration RAM’s or external RAM are always 32 bit oriented.
6.1
Internal Configuration RAM’s
The 4 internal 256 x 32 bit configuration RAM’s (RAM1, RAM2, RAM3 and RAM4) are
used to assign the timeslots of the Framer Receive and Framer Transmit interfaces to
ATM channels. For each port there are 32 entries. RAM1 is used to define the timeslots
of the Framer Receive ports, and RAM2 and RAM3 are used to define the Framer
Transmit ports. RAM4 is responsible for CAS conditioning and freezing in transmit
direction
When the contents of the internal RAMs have been altered by the software, the internal
state machines will load the new values within the next 1.5 frame cycles (187.5 µs). Up
to that point of time the previous values are used.
Data Sheet
120
2003-01-20
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