PXB4219 Datasheet, PDF (151/290 Pages) Infineon Technologies AG – IWE8 Interworking Element for 8 E1/T1 Lines

PXB4219 / PXB4220 / PXB4221
Register Description
7.1
Port Configuration Registers (pcfN)
Read/write Address 00000_H + N
Reset value: 0000.
15
Not used
p_cell_
disc
7
p_srts p_slp
p_thr_m[1:0]
p_ulp p_dlp
p_cas
p_atm
p_ces
8
p_acm
0
p_rx_act p_rx_em p_tx_act p_tx_mfs
p_cell_disc
p_thr_m
p_cas
Port Cell Discard Enable
X = When p_atm = 0 or acfg.a_hec_mode = 0
0 = Port in IMA mode:
No cell discard upon detection of uncorrectable HEC error.
The MSB in the UDF field of the ATM cell header at UTOPIA
interface will indicate the results of the HEC check
1 = Port in standard mode:
Cell discard upon detection of uncorrectable HEC error
Port threshold mode
This bit is relevant in ATM mode (p_atm=1) only.
00 =
Port specific backpressure to UTOPIA is disabled. Entering this
value causes a reset of the corresponding filling level counter.
Resetting this counter during operation may result in an
inappropriate backpressure.
01 = Port specific backpressure to UTOPIA is enabled
Crossing the value defined in thrspN will result in port specific
backpressure. Values can range from 0 to 255 cells.
10 =
Port specific backpressure to UTOPIA is enabled
Crossing the value defined in thrspN will result in port specific
backpressure. The amount of bytes defining the threshold value
equals 53 * C + B. With C representing the 2 most significant bits
of thrspN and B representing the 6 least significant bits of thrspN.
Values can range from 0 to 222 bytes.
11 = Port specific backpressure to UTOPIA is disabled
Port CAS enable
0 = Disabled
Data Sheet
151
2002-05-06