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Section 20 Controller Area Network
Page 1052 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
20.4 Application Note
20.4.1 Test Mode Settings
This module has various test modes. The register TST[2:0] (MCR[10:8]) is used to select this
module test mode. The default (initialised) settings allow this module to operate in Normal mode.
The following table is examples for test modes.
Test Mode can be selected only while in configuration mode. The user must then exit the
configuration mode (ensuring BCR0/BCR1 is set) in order to run the selected test mode.
Bit10:
TST2
Bit9:
TST1
Bit8:
TST0 Description
0 0 0 Normal Mode (initial value)
0 0 1 Listen-Only Mode (Receive-Only Mode)
0 1 0 Self Test Mode 1 (External)
0 1 1 Self Test Mode 2 (Internal)
1 0 0 Write Error Counter
1 0 1 Error Passive Mode
1 1 0 Setting prohib ited
1 1 1 Setting prohib ited
Normal Mode: This module operates in the normal mode.
Listen-Only Mode: ISO-11898 requires this mode for baud rate detection. The Error Counters
are cleared and disabled so that the TEC/REC does not increase the values,
and the CTxn (n = 0, 1) Output is disabled so that this module does not
generate error frames or acknowledgment bits. IRR13 is set when a
message error occurs.
Self Test Mode 1: This module generates its own Acknowledge bit, and can store its own
messages into a reception mailbox (if required). The CRxn/CTxn (n = 0, 1)
pins must be connected to the CAN bus.