TMPR3916 datasheet(148/225 Pages) TOSHIBA

148 / 225 page

Chapter 7 CAN Module (TXCAN)

Preliminary

7-27

7.4.3

Suspend Mode

The suspend mode will be requested by writing a “1” to SUR (MCR register). When the module

enters the suspend mode the status bit SUA (GSR register) will be set to “1”. If the CAN bus line is not

idle, the current transmission/reception of the message will be finished before the suspend mode will be

activated.

In suspend mode the TXCAN is not active on the CAN bus line. That means error flags and

acknowledge flags will not be sent. The error counters and the error passive flag will not be cleared in

the suspend mode.

If the suspend mode is requested during the bus off recovery sequence, the module stops after the bus

off recovery sequence was finished. The module remains inactive until suspend mode request SUR is

deactivated. The suspend mode acknowledge flag is not activated, although the SUR bit is “1” and the

module is inactive. To restart the module, the SUR bit has to be programmed to “0”. After leaving the

bus off state or the inactive state, the module will restart its power-up sequence.

TXCAN leaves the suspend mode by writing a “0” to SUR.

TMPR3916 Datasheet(PDF) 148 Page - Toshiba Semiconductor