PEF2256 INFINEON [Infineon Technologies AG], PEF2256 Datasheet - Page 306

• Manufacturer Part Number: PEF2256
• Description: E1/T1/J1 Framer and Line Interface Component for Long- and Short-Haul Applications
• Manufacturer: INFINEON [Infineon Technologies AG]

NMF
LMFA
User’s Manual
Hardware Description
No Multiframe Alignment Found
This bit is only valid if the CRC4 interworking is selected
(FMR2.RFS(1:0) = 11). Set if the multiframe pattern is not detected in
a time interval of 400 ms after the framer has reached the
doubleframe synchronous state. The receiver is then automatically
switched to doubleframe format.
This bit is reset if the basic framing has been lost.
Loss of Multiframe Alignment
Not used in doubleframe format (FMR2.RFS1 = 0). In this case LMFA
is set.
In CRC-multiframe mode (FMR2.RFS1 = 1), this bit is set
– if force resynchronization is initiated by setting bit FMR0.FRS, or
– if multiframe force resynchronization is initiated by setting bit
– if pulseframe alignment has been lost (FRS0.LFA).
It is reset if two CRC-multiframes have been received at an interval of
n
If bit FRS0.LMFA is cleared a loss of multiframe alignment recovery
interrupt status ISR2.MFAR is generated.
FMR1.MFCS, or
2 ms (n = 1, 2, 3 and so forth) without a framing error.
306
DS1.1, 2003-10-23
PEF 2256 H/E
E1 Registers
FALC
®
56