C515C_9711 Datasheet, PDF (162/268 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

On-Chip Peripheral Components
C515C
Yes
bus idle
No
?
No
TXRQ = 1
CPUUPD = 0
Yes
NEWDAT: = 0
load identifier and
control into buffer
send remote frame
received frame with
same identifier as this
No
message object
?
Yes
Yes
MSGLST: = 1
NEWDAT = 1
No
No
transmission
successful
?
Yes
TXRQ: = 0
RMTPND: = 0
No
TXIE = 1
Yes
INTPND: = 1
store message
NEWDAT: = 1
TXRQ: = 0
RMTPND: = 0
RXIE = 1
No
Yes
INTPND: = 1
0:reset
1:set
MCD02740
Figure 6-45
CAN Controller Handling of Message Objects with Direction = receive
Semiconductor Group
6-99
1997-11-01