RL78/F13, F14 CHAPTER 18 CAN INTERFACE (RS-CAN LITE)
R01UH0368EJ0210 Rev.2.10 1395
Dec 10, 2015
18.7 Test Function
The test function is classified into communication tests and global tests.
Communication tests: Performed for each channel.
• Standard test mode
• Listen-only mode
• Self-test mode 0 (external loopback mode)
• Self-test mode 1 (internal loopback mode)
Global tests: Performed in entire module
• RAM test (read/write test)
18.7.1 Standard Test Mode
Standard test mode allows CRC test.
18.7.2 Listen-Only Mode
Listen-only mode allows reception of data frames and remote frames. Only recessive bits are transmitted on the CAN
bus, and the ACK bit, overload flag, and active error flag are not transmitted. Listen-only mode is available for detecting
the communication speed.
Do not make a transmit request from any buffer in listen-only mode.
Figure 18-10 shows the connection when listen-only mode is selected.
Figure 18-10. Connection when Listen-Only Mode is Selected
CRXDi
CTXDi
Remark i = 0
Transmits the ACK bit, overload flag,
and active error flag.
CTXDi
(internal)
CRXDi
(internal)
Recessive level
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