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RL78/D1A User's Manual: Hardware - Renesas

RL78/D1A User's Manual: Hardware - Renesas

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Under development<br />

Preliminary document<br />

Specifications in this document are tentative and subject to change.<br />

<strong>RL78</strong>/<strong>D1A</strong> CHAPTER 14 CAN CONTROLLER<br />

(b) Write<br />

Figure 14-28. Format of CAN Global Automatic Block Transmission Control Register<br />

(C0GMABT, C1GMABT) (2/2)<br />

ABTTRG Automatic Block Transmission Status Bit<br />

0 Automatic block transmission is stopped.<br />

1 Automatic block transmission is under execution.<br />

Caution Do not set the ABTTRG bit (ABTTRG = 1) in the initialization mode. If the<br />

ABTTRG bit is set in the initialization mode, the operation is not guaranteed<br />

after the CAN module has entered the normal operation mode with ABT.<br />

Do not set the ABTTRG bit (1) while the C0CTRL.TSTAT.TSTAT, C1CTRL.TSTAT<br />

bit is set (1). Confirm TSTAT = 0 directly in advance before setting ABTTRG bit.<br />

Set ABTCLR Automatic Block Transmission Engine Clear Request Bit<br />

0 The automatic block transmission engine is in idle state or under operation.<br />

1 Request to clear the automatic block transmission engine. After the automatic block<br />

transmission engine has been cleared, automatic block transmission is started from<br />

message buffer 0 by setting the ABTTRG bit to 1.<br />

Set ABTTRG Clear<br />

ABTTRG<br />

Automatic Block Transmission Start Bit<br />

0 1 Request to stop automatic block transmission.<br />

1 0 Request to start automatic block transmission.<br />

Other than above No change in ABTTRG bit.<br />

Caution While receiving a message from another node or transmitting the messages other<br />

than the ABT messages (message buffer 8 to 15), there is a possibility not to<br />

begin immediately the transmission even if the ABTTRG bit is set to 1.<br />

Transmission is not aborted even if the ABTTRG bit is cleared to 0, until the<br />

transmission of the ABT message, which is currently being transmitted is<br />

completed (successfully or not). After that, the transmission is aborted.<br />

R01UH0317EJ0004 Rev. 0.04 848<br />

Feb. 22, 2013

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