Datasheet

49.6.5 MCAN Test Register
Name: MCAN_TEST
Offset: 0x10
Reset: 0x00000000
Property: Read/Write
Write access to the Test Register has to be enabled by setting bit MCAN_CCCR.TEST to ‘1’.
All MCAN T
est Register functions are set to their reset values when bit MCAN_CCCR.TEST is cleared.
Loop Back mode and software control of pin CANTX are hardware test modes. Programming of TX ≠ 0 disturbs the
message transfer on the CAN bus.
The reset value for MCAN_TEST.RX is undefined.
Bit 31 30 29 28 27 26 25 24
Access
Reset
Bit 23 22 21 20 19 18 17 16
Access
Reset
Bit 15 14 13 12 11 10 9 8
Access
Reset
Bit 7 6 5 4 3 2 1 0
RX TX[1:0] LBCK
Access
R R/W R/W R/W
Reset x 0 0 0
Bit 7 – RX Receive Pin (read-only)
Monitors the actual value of pin CANRX.
The reset value for this bit is undefined.
Value Description
0
The CAN bus is dominant (CANRX = ‘0’).
1
The CAN bus is recessive (CANRX = ‘1’).
Bits 6:5 – TX[1:0] Control of T
ransmit Pin (read/write)
Value Name Description
0
RESET Reset value, CANTX controlled by the CAN Core, updated at the
end of the CAN bit time.
1
SAMPLE_POINT_MONITORING Sample Point can be monitored at pin CANTX.
2
DOMINANT Dominant (‘0’) level at pin CANTX.
3
RECESSIVE Recessive (‘1’) at pin CANTX.
Bit 4 – LBCK Loop Back Mode (read/write)
0 (DISABLED): Reset value. Loop Back mode is disabled.
1 (ENABLED): Loop Back mode is enabled (see T
est Modes).
SAM E70/S70/V70/V71 Family
Controller Area Network (MCAN)
© 2019 Microchip T
echnology Inc.
Datasheet
DS60001527D-page 1440