peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 306

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

XREP
RFR
RLI
Note: Significant in point-to-point configurations!
CEC
XAC
AFI
5.1.1.5.12 Receive Status Register (RSTA)
Access: read
Reset value: xx
RSTA always displays the momentary state of the receiver. Because this state can differ
from the last entry in the FIFO it is reasonable to always use the status bytes in the FIFO.
VFR
Semiconductor Group
bit 7
VFR
Read back value of the corresponding command bit CMDR:XREP.
RFIFO Read enable.
A ‘1’ indicates, that valid data is in the RFIFO and read access is enabled.
RFR is set with the RME- or RPF-interrupt and reset when executing the
RMC-command.
Receiver Line Inactive.
Neither flags as inter frame time fill nor frames are received via the receive
line.
Command Execution.
When ‘0’ no command is currently executed, the CMDR-register can be
written to.
When ‘1’ a command (written previously to CMDR) is currently executed, no
further command must temporarily be written to the CMDR-register.
Transmitter Active.
A ‘1’ indicates, that the transmitter is currently active.
Additional Frame Indication.
A ‘1’ indicates, that one or more completely received frames or the last part
of a frame are in the CPU inaccessible part of the RFIFO.
In combination with the bit STAR:RFR multiple frames can be read out of the
RFIFO without interrupt control.
Valid Frame.
Indicates whether the received frame is valid (‘1’) or not (‘0’ invalid).
A frame is invalid when
– its length is not an integer multiple of 8 bits (n × 8 bits), e.g. 25 bit,
– its is to short, depending on the selected operation mode:
– a frame was aborted (note: VFR can also be set when a frame was
RDO
transparent mode 1: 3 bytes
transparent mode 0: 2 bytes
aborted)
H
CRC
RAB
5-63
HA1
HA0
Description of Registers
C/R
PEB 20560
bit 0
2003-08
LA