PXB4219E Datasheet, PDF (95/290 Pages) Infineon Technologies AG – Interworking Element for 8 E1/T1 Lines

IWE8, V3.4
PXB 4219E, PXB 4220E, PXB 4221E
Interface Description
Table 25
Frame slot
9
10
11
12
13
14
15
Time slot Mapping in T1 Translation Mode 0 (cont’d)
T1 channel
Frame slot T1 channel
channel 7
25
channel 19
channel 8
26
channel 20
channel 9
27
channel 21
28
channel 10
29
channel 22
channel 11
30
channel 23
channel 12
31
channel 24
The F-channel only contains the F-bit. Its location in the F channel is shown in Table 26.
Table 26 F-Channel Format in T1 Mode
MSB
F channel
LSB
bit 1
bit 2
bit 3
bit 4
bit 5
bit 6
bit 7
bit 8
F-bit
5.1.1.2 E1 FALC Mode
In E1 mode (Pin E1/T1 = 1) there are 32 channels numbered from 0 to 31. The channels
are directly mapped into the corresponding 32 frame slots.
5.1.2 Generic Interface Mode (GIM)
The Generic Interface Mode (GIM) makes the framer interface more universal, so that
other framer/line interface units or T1/E1 transceivers can be connected directly to the
IWE8. Depending on the E1/T1 pin, the interface can be adopted to line bit rates of
1.544 MHz (T1 rate) or 2.048 MHz (E1 rate). The mode is enabled by setting bit om =
01_B in “opmo”, see Chapter 7.24. Make sure that no clocks are applied to the transmitter
when switching to GIM (FTCKOi has to be disconnected to ensure proper port function).
5.1.2.1 T1 Mode
FRCLK[7:0]
FRDAT[7:0]
Framer Receive Clock
Receive clock input at 1.544 MHz
Framer Receive Data
depending on bit “frri” in “opmo”:
0=
FRDAT is sampled with the falling edge of FRCLK
Data Sheet
95
2003-01-20