RM0319 datasheet(199/368 Pages) STMICROELECTRONICS

Nome de Peças	RM0319

Descrição Electrónicos	SPEAr320S architecture and functionality

PDF	368 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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199 / 368 page

RM0319

Controller area network ports (CAN)

Doc ID 022640 Rev 3

199/368

Figure 68.

CAN core in silent mode

In ISO 11898-1, the silent mode is called bus monitoring mode.

15.4.6

Using the loop back mode

The CAN core can be set in loop back mode by programming the LBack bit of Test register

to one. In loop back mode, the CAN core treats its own transmitted messages as received

messages and stores them (if they pass acceptance filtering) into a receive buffer. The

following figure shows the connection of signals CAN_TX and CAN_RX to the CAN core in

loop back mode.

Figure 69.

CAN Core in loop back mode

This mode is provided for self-test functions. To be independent from external stimulation,

the CAN core ignores acknowledge errors (recessive bit sampled in the acknowledge slot of

a data / remote frame) in loop back mode. In this mode, the CAN core performs an internal

CAN Core

C_CAN

CAN_TX

CAN_RX

CAN Core

C_CAN

CAN_TX

CAN_RX

RM0319 Folha de dados(PDF) 199 Page - STMicroelectronics