PXB4219E Datasheet, PDF (140/290 Pages) Infineon Technologies AG – Interworking Element for 8 E1/T1 Lines

IWE8, V3.4
PXB 4219E, PXB 4220E, PXB 4221E
Memory Structure
3) _{If the “auto-re-initialization on underflow” feature is enabled (RAM3.AAL Transmit}
Reference Slot.auto_reinit_uf = 1B), the re-initialization of the Reassembly Buffer will terminate an underflow
status as soon as start of underflow is detected. Thus, the underflow status for the device is no longer valid
although the underflow condition still exists. No starvation cells due to underflow will be inserted and counter
13 will not increment Therefore, it is recommended to disable “auto-re-initialization on underflow”
(RAM3.AAL Transmit Reference Slot.auto_reinit_uf = 0B) and perform the re-initialization of the reassembly
buffer by software.
The format of the counter entries is as follows:
31
int_gen
23
15
7
24
count_value[30:24]
16
count_value[23:16]
8
count_value[15:8]
0
count_value[7:0]
int_gen
interrupt queue entry generated
Indicates if an interrupt queue entry was generated for this counter. Only
one interrupt queue entry per counter can be generated.
0 = False
1 = True
count_value counter value
4000_0000_H indicates the maximum value. The counter will not
increment beyond this value
6.2.2 Statistics Counter thresholds
Read/write Address 22000_H to 23FFF_H
Reset value: Not applicable. RAM must be reset and initialized via SW
Memory size: 4K × 32 bits: 8 ports x 32 channels x 16 counter thresholds
Data Sheet
140
2003-01-20