
QuadFALCTM
PEF 22554 E
T1/J1 Registers
Data Sheet
450
Rev. 1.2, 2006-01-26
XMFA
2
rw
Transmit Multiframe Aligned - HDLC Channel 1
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. If
CCR1.EDLXis set, transmission of DL-bits is started in F72 format
with frame 26. The first byte in XFIFO is transmitted in the first time
slot selected by TTR(4:1) and so on. After receiving a complete
multiframe in the time slot mode (RTR(4:1)) an ISR0.RME interrupt
is generated, if no HDLC or BOM mode is enabled. In DL-bit access
(CCR1.EDLX/EITS = 10B) XMFA is not valid.
RFT
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, see Chapter 3.4.3. If
MODE.RFT2 = 1 these bits are not valid and the accessible receive FIFO
size is 64 byte.
The value of RFT(2:0) can be changed dynamically
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 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 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 RFT 000B 32 bytes (default value)
001B 16 bytes
010B 4 bytes
011B 2 bytes
1xxB 64 bytes
Table 102
RFT Constant Values (Case 2)
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