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Chapter 16
FCAN Controller
User’s Manual U16702EE3V2UD00
Figure 16-38:
CAN Module Receive History List Register (CnRGPT) Format (2/2)
(b) Write
(16) CAN module last out-pointer register (CnLOPT)
The CnLOPT register indicates the number of the message buffer to which a data frame or a
remote frame was transmitted last.
Figure 16-39:
CAN Module Last Out-Pointer Register (CnLOPT) Format
Remark:
The value read from the CnLOPT register is undefined if a data frame or remote frame has
never been transmitted from a message buffer. If the THPM bit is set to 1 after the CAN
module has changed from the initialization mode to an operation mode, therefore, the read
value of the CnLOPT register is undefined.
Clear ROVF
Setting of ROVF bit
0
ROVF bit is not changed.
1
ROVF bit is cleared to 0.
7
6
5
4
3
2
1
0
Address R/W After reset
CnLOPT LOPT7
LOPT6
LOPT5
LOPT4
LOPT3
LOPT2
LOPT1
LOPT0
see Table
16-16
R
undefined
LOPT7 to LOPT0
Last out-pointer of transmit history list (LOPT)
0.....31
When the CnLOPT register is read, the contents of the element indexed by the last out-
pointer (LOPT) of the receive history list are read. These contents indicate the number
of the message buffer to which a data frame or a remote frame was transmitted last.
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