PEB22554 SIEMENS [Siemens Semiconductor Group], PEB22554 Datasheet - Page 290

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

XMFA …
RFT1, RFT0…
Semiconductor Group
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
RFIFO Threshold Level
The size of the accessible part of RFIFO can be determined by
programming these bits. The number of valid bytes after an RPF
interrupt is given in the following table:
RFT1
0
0
1
1
The value of RFT 1,0 can be changed dynamically
– If reception is not running or
– after the current data block has been read, but before the command
Note: It is seen that changing the value of RFT1,0 is possible even
CMDR.RMC is issued (interrupt controlled data transfer).
Contents of the XFIFO is transmitted without multiframe
Contents of the XFIFO is transmitted multiframe aligned. If
alignment.
CCR1.EDLXis set, transmitting of DL bits is started in F72
format with frame 26.
After receiving a complete multiframe in the time-slot mode
(RTR1-4) an ISR0.RME interrupt is generated, if no HDLC or
BOM mode is enabled. In DL bit access (CCR1.EDLX/EITS =
10) XMFA is not valid.
XMFS interval time should not be changed, otherwise the
XFIFO data has to be retransmitted.
during the reception of one frame. The total length of the
received frame can be always read directly in RBCL, RBCH
after an RPF interrupt, except when the threshold is increased
during reception of that frame. The real length can then be
inferred by noting which bit positions in RBCL are reset by an
RMC command (see table below):
RFT0
0
1
0
1
Size of Accessible Part of RFIFO
32 bytes (RESET value)
16 bytes
4 bytes
2 bytes
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Operational Description T1 / J1
PEB 22554
09.98