Register Description
CRC
RAB
CRC Check
The CRC is correct (1) or incorrect (0).
Receive Message Aborted
The receive message was aborted by the remote station (1), i.e. a sequence of 7 1’s
was detected.
SA1-0 SAPI Address Identification
TA
TEI Address Identification
SA1-0 are significant in auto-mode and non-auto-mode with a two-byte address field,
as well as in transparent mode 3. TA is significant in all modes except in transparent
modes 2 and 3.
Two programmable SAPI values (SAP1, SAP2) plus a fixed group SAPI (SAPG of
value FC/FE ), and two programmable TEI values (TEI1, TEI2) plus a fixed group
H
TEI (TEIG of value FF ), are available for address comparison.
H
The result of the address comparison is given by SA1-0 and TA, as follows
Address Match with
1st Byte
2nd Byte
SA1
SA0
TA
Number of address
bytes = 1
x
x
x
x
0
1
TEI2
TEI1
–
–
0
0
0
0
1
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
x
SAP2
SAP2
SAPG
SAPG
SAP1
SAP1
TEIG
TEI2
TEIG
TEI1 or TEI2
TEIG
Number of address
bytes = 2
TEI1
reserved
Notes: ● If the SAPI values programmed to SAP1 and SAP2 are identical the reception of a
frame with SAP2/TEI2 results in the indication SA1 = 1, SA0 = 0, TA = 1.
● Normally RSTA should be read by the processor after an RME interrupt in order to
determine the status of the received frame. The contents of RSTA are valid only
after an RME interrupt, and remain so until the frame is acknowledged via the RMC
bit.
Semiconductor Group
213
INFINEON [ Infineon ]
