Rainbow Electronics ATmega64M1 User Manual
Page 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
-
IDEMSK
CANIDM4
-
-
-
-
-
-
-
-
CANIDM3
IDMSK2
IDMSK1
IDMSK0
-
-
-
-
-
CANIDM2
IDMSK10
IDMSK9
IDMSK8
IDMSK7
IDMSK6
IDMSK5
IDMSK4
IDMSK3
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
-
-
-
-
-
-
-
-
Bit
15/7
14/6
13/5
12/4
11/3
10/2
9/1
8/0
IDMSK4
IDMSK3
IDMSK2
IDMSK1
IDMSK0
RTRMSK
-
IDEMSK
CANIDM4
IDMSK12
IDMSK11
IDMSK10
IDMSK9
IDMSK8
IDMSK7
IDMSK6
IDMSK5
CANIDM3
IDMSK20
IDMSK19
IDMSK18
IDMSK17
IDMSK16
IDMSK15
IDMSK14
IDMSK13
CANIDM2
IDMSK28
IDMSK27
IDMSK26
IDMSK25
IDMSK24
IDMSK23
IDMSK22
IDMSK21
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
-
-
-
-
-
-
-
-