Rainbow-electronics ATmega64M1 Instrukcja Użytkownika Pobierz pdf (Strona 196)

196

8209A–AVR–08/09

ATmega16M1/32M1/64M1

20.11.4 CANIDM1, CANIDM2, CANIDM3, and CANIDM4 – CAN Identifier Mask Registers

V2.0 part A

V2.0 part B

V2.0 part A

• Bit 31:21 – IDMSK[10:0]: Identifier Mask

– 0 - comparison true forced - See “Acceptance Filter” on page 176.

– 1 - bit comparison enabled - See “Acceptance Filter” on page 176.

• Bit 20:3 – Reserved Bits

These bits are reserved for future use. For compatibility with future devices, they must be written

to zero when CANIDMn are written.

• Bit 2 – RTRMSK: Remote Transmission Request Mask

– 0 - comparison true forced

– 1 - bit comparison enabled.

• Bit 1 – Res: Reserved

This bit is reserved for future use. For compatibility with future devices, it must be written to zero

when CANIDTn are written.

• Bit 0 – IDEMSK: Identifier Extension Mask

– 0 - comparison true forced

– 1 - bit comparison enabled.

V2.0 part B

• Bit 31:3 – IDMSK[28:0]: Identifier Mask

– 0 - comparison true forced - See “Acceptance Filter” on page 176.

– 1 - bit comparison enabled. - See “Acceptance Filter” on page 176.

–

Bit 15/7 14/6 13/5 12/4 11/3 10/2 9/1 8/0

-----RTRMSK-IDEMSKCANIDM4

--------CANIDM3

IDMSK

0-----CANIDM2

IDMSK

3CANIDM1

Bit 31/23 30/22 29/21 28/20 27/19 26/18 25/17 24/16

Read/Write R/W R/W R/W R/W R/W R/W R/W R/W

Initial Value--------

Bit 15/7 14/6 13/5 12/4 11/3 10/2 9/1 8/0

IDMSK

0 RTRMSK - IDEMSK CANIDM4

IDMSK

5 CANIDM3

IDMSK

13 CANIDM2

IDMSK

21 CANIDM1

Bit 31/23 30/22 29/21 28/20 27/19 26/18 25/17 24/16

Read/Write R/W R/W R/W R/W R/W R/W R/W R/W

Initial Value--------

1 2 ... 191 192 193 194 195 196 197 198 199 200 201 ... 342 343

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