
Data Sheet
239
Rev. 1.2, 2006-01-26
QuadFALCTM
PEF 22554 E
E1 Registers
XMFA
2
rw
Transmit Multiframe Aligned
Determines the synchronization between the framer and the
corresponding signaling controller.
Note: During the transmission of the XFIFO content, the SYPX or XMFS
interval time should not be changed, otherwise the XFIFO data has
to be retransmitted.
0B
The contents of the XFIFO is transmitted without multiframe
alignment.
1B
The contents of the XFIFO is transmitted multiframe aligned. The
first byte in XFIFO is transmitted in the first time slot selected by
TTR(4:1) and so on. After reception of a complete multiframe in the
time slot mode (RTR(4:1)) an ISR0.RME interrupt is generated, if
no HDLC mode is enabled. In Sa-bit access mode XMFA is not
valid.
RFT1
1:0
rw
RFIFO Threshold Level - HDLC Channel 1
The size of the accessible part of RFIFO can be determined by
programming these bits and the bit MODE.RFT2. If MODE.RFT2 = 1B
these bits are not valid and the accessable receive FIFO size is 64 byte.
The value of RFT(2:0) can be changed dynamically. See Table 10 If reception is not running or
After the current data block has been read, but before the command
CMDR.RMC is issued (interrupt controlled data transfer).
Note: Changing of the value of RFT(2:0) is possible even during the
reception of one frame. The total length of the received frame can
be always read directly in RBCL, RBCH after a 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 a RMC command (see table RFT 000B 32 bytes (default value)
001B 16 bytes
010B 4 bytes
011B 2 bytes
1xxB 64 bytes
Table 68
RFT Constant Values
Name and Description
Value
Bit Positions in RBCL Reset by a CMDR.RMC Command
RBC(5:0)
1xxB
Bit Positions in RBCL Reset by a CMDR.RMC Command
RBC(4:0)
000B
Bit Positions in RBCL Reset by a CMDR.RMC Command
RBC(3:0)
001B
Field
Bits
Type
Description