70353C datasheet(13/76 Pages) MICROCHIP

13 / 76 page

DS70353C-page 21-13

Section 21. Enhanced Controller Area Network (ECAN™)

CiFEN1: ECAN Acceptance Filter Enable Register

R/W-1

FLTEN<15:8>

bit 15

bit 8

R/W-1

FLTEN<7:0>

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 15-0

FLTENn: Enable Filter n bits (n = 0-15)

1 = Enable filter n to accept messages

0 = Disable filter n

CiRXFnSID: ECAN Acceptance Filter Standard Identifier Register n (n = 0-15)

R/W-x

SID10

SID9

SID8

SID7

SID6

SID5

SID4

SID3

bit 15

bit 8

R/W-x

U-0

R/W-x

U-0

R/W-x

SID2

SID1

SID0

—

EXIDE(1)

—EID17

EID16

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 15-5

SID<10:0>: Standard Identifier bits

1 = Message address bit, SIDx, must be ‘1’ to match filter

0 = Message address bit, SIDx, must be ‘0’ to match filter

bit 4

Unimplemented: Read as ‘0’

bit 3

EXIDE: Extended Identifier Enable bit(1)

If MIDE = 1:

1 = Match only messages with extended identifier addresses

0 = Match only messages with standard identifier addresses

If MIDE = 0:

Ignore EXIDE bit.

bit 2

Unimplemented: Read as ‘0’

bit 1-0

EID<17:16>: Extended Identifier bits

1 = Message address bit, EIDx, must be ‘1’ to match filter

0 = Message address bit, EIDx, must be ‘0’ to match filter

Note 1: If no mask is applied to a filter, the following occurs: The filter accepts only standard frames. The filter

does not accept extended frames even if the EXIDE bit is set to ‘1’.

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