C515C_9711 Datasheet, PDF (147/268 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

On-Chip Peripheral Components
C515C
CAN Status Register SR (Address XX01H)
Bit No. MSB
7
6
5
4
3
2
XX01H BOFF EWRN
–
RXOK TXOK
r
r
r
rw
rw
Reset Value : XXH
LSB
1
0
LEC
SR
rw
Bit
BOFF
EWRN
RXOK
TXOK
Function
Busoff status
Indicates when the CAN controller is in busoff state (see EML).
Error warning status
Indicates that at least one of the error counters in the EML has reached the error
warning limit of 96.
Received message successfully
Indicates that a message has been received successfully, since this bit was last
reset by the CPU (the CAN controller does not reset this bit!).
Transmitted message successfully
Indicates that a message has been transmitted successfully (error free and
acknowledged by at least one other node), since this bit was last reset by the CPU
(the CAN controller does not reset this bit!).
Semiconductor Group
6-84
1997-11-01