PEB22554 SIEMENS [Siemens Semiconductor Group], PEB22554 Datasheet - Page 106

• Manufacturer Part Number: PEB22554
• Description: ICs for Communications
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

EITS…
ITF…
XMFA …
RFT1, RFT0…RFIFO Threshold Level
Semiconductor Group
RFT1
0
0
1
1
Enable Internal Time-Slot 0-31 Signaling
0…
1…
Interframe Time Fill
Determines the idle (= no data to send) state of the transmit data
coming from the signaling controller.
0…
1…
Transmit Multiframe Aligned
Determines the synchronization between the framer and the
corresponding signaling controller.
0…
1…
Note: During the transmission of the XFIFO content, the SYPX or
The size of the accessible part of RFIFO can be determined by
programming these bits. The number of valid bytes after a RPF
interrupt is given in the following table:
The value of RFT1, 0 can be changed dynamically.
– If reception is not running or
Internal signaling in time-slots 0-31 defined via registers RTR1-
Internal signaling in time-slots 0-31 defined via registers RTR1-
Continuous logical ‘1’ is output
Continuous FLAG sequences are output (‘01111110’ bit
Contents of the XFIFO is transmitted without multiframe
Contents of the XFIFO is transmitted multiframe aligned.
4 or TTR1-4 is disabled.
4 or TTR1-4 is enabled.
patterns)
alignment.
After receiving a complete multiframe in the time-slot mode
(RTR1-4) an ISR0.RME interrupt is generated, if no HDLC
mode is enabled. In SA4-8 bit access XMFA is not valid.
XMFS interval time should not be changed, otherwise the
XFIFO data has to be retransmitted.
RFT0
0
1
0
1
106
Size of Accessible Part of RFIFO
32 bytes (RESET value)
16 bytes
4 bytes
2 bytes
Operational Description E1
PEB 22554
09.98