pef20550 Infineon Technologies Corporation, pef20550 Datasheet - Page 175
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pef20550
Manufacturer Part Number
pef20550
Description
Extended Line Card Interface Controller Elic
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEF20550.pdf
(407 pages)
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4.7.11 Status Register (STAR)
Access in demultiplexed P-interface mode:
Access in multiplexed P-interface mode:
Reset value: 48
XDOV
XFW
Note: XFW is only valid when CEC = 0.
AREP/
XREP
RFR
RLI
Note: Significant in point-to-point configurations!
CEC
XAC
AFI
Semiconductor Group
bit 7
XDOV
Transmit Data Overflow.
A ’1’ indicates, that more than 32 bytes have been written into the XFIFO.
XFIFO Write enable.
A ’1’ indicates, that data can be written into the XFIFO.
Auto Repeat/Transmission Repeat.
Read back value of the corresponding command bit CMDR:AREP/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.
In bus mode the transmitter is considered active also when it waits for bus
access.
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.
XFW
H
AREP/
XREP
RFR
175
read
read
RLI
address: (Ch-A/Ch-B): 21
address: (Ch-A/Ch-B): 42
Detailed Register Description
CEC
XAC
PEB 20550
PEF 20550
bit 0
H
H
AFI
/61
/C2
01.96
H
H
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