PXB4219E Datasheet, PDF (254/290 Pages) Infineon Technologies AG – Interworking Element for 8 E1/T1 Lines

IWE8, V3.4
PXB 4219E, PXB 4220E, PXB 4221E
Electrical Characteristics
9.6.2.3 Framer Interface in SYM Mode
Framer Interface in SYM2
1
RFCLK
opmo.frri = 1
1
RFCLK
opmo.frri = 0
FRDAT
FRMFB0
7
FTDAT
5
6
3
4
Figure 61 Framer Interface Timing for SYM 2.048 MHz
Fitsym2
Table 39 Framer Interface AC Timing Characteristics in SYM2 Mode
No. Parameter
Limit Values
Min
Typ
Max
1
T_RFCLK: Period RFCLK
1A F_RFCLK: Frequency RFCLK
3
Setup time FRDAT before RFCLK
15
falling/rising (center of bit period)
488
2,048
4
Hold time FRDAT after RFCLK falling/ 15
rising (center of bit period)
5
Setup time FRMFBN¹⁾ before RFCLK 15
falling/rising
6
Hold time FRMFBN¹⁾ after RFCLK
15
falling
7
Delay RFCLK falling/rising to FTDAT 3
32
1) _{For usage of FRMFBN in SYM mode see Chapter 7.24}
Unit
ns
MHz
ns
ns
ns
ns
ns
Data Sheet
254
2003-01-20