PXB 4221 E V3.4-G Infineon Technologies, PXB 4221 E V3.4-G Datasheet - Page 49

• Manufacturer Part Number: PXB 4221 E V3.4-G
• Description: IC ATM/IP INTERWORKING BGA-256
• Manufacturer: Infineon Technologies

Specifications of PXB 4221 E V3.4-G

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PXB4221EV3.4X; PXB4221EV34GXP; SP000017875

.
Figure 10
No discarding of HEC errored cells as an option is available and selectable via bit
“a_hec_mode” in the register acfg
indicated by setting the most significant bit in the UDF field at the UTOPIA receive
interface. For correct operation bit P_CELL_DIS must be cleared.
4.2.1.3
ITU-T I.432.3 [34] recommends the self-synchronizing scrambler x
scrambling at E1 data rates. For T1 no scrambling is recommended.
The self-synchronizing scrambler function is implemented in the device. It can be
disabled per port by the x43_descrambling bit in the “ATM Receive Reference Slot” in
RAM1.
4.2.1.4
According to ITU-T I.361 [30], idle cells, physical layer OAM cells and cells reserved for
use by the physical layer are not passed to the ATM layer at the UNI.
Data Sheet
Cell Payload Descrambling
Idle, Physical Layer or Unassigned Cell Deletion
HEC Detection According to ATM Forum
detected
No error
(Chapter
Detection
Mode
49
PXB 4219E, PXB 4220E, PXB 4221E
7.2). In this case an errored HEC is
Error detected
Cell discarded
Operational Description
43
+1 for payload
IWE8, V3.4
2003-01-20
Atmfhec