Nations N32G45 Series, User Manual

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Nations Technologies Inc.
Tel
：
+86-755-86309900
Email
：
info@nationstech.com
Address: Nations Tower, #109 Baoshen Road, Hi-tech Park North.
Nanshan District, Shenzhen, 518057, P.R.China
Bit Field Name Description
31:28 Reserved Reserved, the reset value must be maintained.
13:0 FACx Filter active
The software sets '1' for someone to activate the corresponding filter. The
corresponding filter register i(CAN_FiR[2:1]) can only be modified after the
CAN_FA1.FACx bit is cleared or the CAN_FMC.FINITM bit is set.
0: The filter is disabled;
1: The filter is activated.
CAN filter i register x
（
CAN_FiRx
）（
i
＝
0..13;x=1..2
）
Address offset: 0x240h, 0x31C
Reset value: undefined
Notes : 14 groups of filters: i = 0 ... 13. Each group of filters consists of two 32-bit registers, CAN_FiR[2:1].
Only when the corresponding CAN_FA1.FACx bit is cleared or the CAN_FMC.FINIT bit is set, the corresponding filter
register can be modified.
Bit Field Name Description
31:0 FBC[31:0] Filter bits
Identifier pattern
Each bit of the register corresponds to the level of the corresponding bit of the
expected identifier.
0: the corresponding bit is expected to be dominant;
1: The corresponding bit is expected to be recessive.
Mask bit pattern
Each bit of the register indicates whether the corresponding identifier register bit
must be consistent with the corresponding bit of the expected identifier.
0: Don't care, this bit is not used for comparison;
1: Must match, and the incoming identifier bit must be consistent with the
identifier register bit corresponding to the filter.
Notes : According to the different settings of filter bit width and mode, the functions of the two registers in the filter