PXB4220EV3.4X Infineon Technologies, PXB4220EV3.4X Datasheet - Page 85

• Manufacturer Part Number: PXB4220EV3.4X
• Manufacturer: Infineon Technologies

Specifications of PXB4220EV3.4X

• Data Rate: 2.048Mbps
• Number Of Channels: 1
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Table 22
RAM
4.11
The two LSB bits of a slot entry identify the slot type:
Table 21
Slot Type
ATM/AAL Idle
ATM/AAL Continuation
ATM/AAL Reference
4.11.1
The IWE8 supports any mapping scheme of ATM cells into N of the 32 timeslots of the
framer interfaces.
The mapping scheme is defined by programming 32 slot positions in the internal RAMs.
RAM1 is used for receive port configuration and RAM2 for transmit port configuration.
• For each configuration exactly one timeslot should be programmed as the “ATM
• Depending on the Link data rate 29 (E1) or 23 (T1) timeslots should be programmed
• The remaining unused slots should be programmed as “AAL Idle Slots”.
For mapping of ATM cells in T1/E1 frames according to ITU-T G.804 [26] the internal
RAM slot positions should be programmed as shown in
Data Sheet
Slot Slot RAM Slot Type
0
1
2
3
4
5
6
7
8
9
Reference Slot”.
as “ATM Continuation Slots”.
0
1
2
3
4
5
6
7
8
9
Mapping of Channels to Timeslots
ATM Mode
ATM Idle
ATM Reference
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
Coding of Slot Type in internal configuration RAMs
RAM slot positions for ITU-T G.804 compliant ATM mapping
E1
Slot RAM Slot Type
1
2
3
4
5
6
7
ATM Idle
ATM Reference
ATM Continuation
ATM Continuation
ATM Idle
ATM Continuation
ATM Continuation
ATM Continuation
ATM Idle
ATM Continuation
T1 in FAM
Bit 1
85
0
1
X
PXB 4219E, PXB 4220E, PXB 4221E
Table
1
2
3
4
5
6
7
8
9
10
Slot
Operational Description
22.
RAM Slot Type
ATM Continuation
ATM Reference
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
T1 in GIM
Bit 0
0
0
1
IWE8, V3.4
2003-01-20