atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 196

• Manufacturer Part Number: atmega32c1
• Description: Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

16.11.3
196
ATmega32/64/M1/C1
CAN Identifier Tag Registers -
CANIDT1, CANIDT2, CANIDT3, and CANIDT4
V2.0 part A
• Bit 4 – IDE: Identifier Extension
IDE bit of the remote or data frame to send.
This bit is updated with the corresponding value of the remote or data frame received.
• Bit 3:0 – DLC3:0: Data Length Code
Number of Bytes in the data field of the message.
DLC field of the remote or data frame to send. The range of DLC is from 0 up to 8. If DLC field >8
then effective DLC=8.
This field is updated with the corresponding value of the remote or data frame received. If the
expected DLC differs from the incoming DLC, a DLC warning appears in the CANSTMOB
register.
• Bit 31:21 – IDT10:0: Identifier Tag
Identifier field of the remote or data frame to send.
This field is updated with the corresponding value of the remote or data frame received.
• Bit 20:3 – Reserved Bits
Initial Value
Initial Value
Read/Write
Read/Write
Bit
Bit
Bit
Bit
– 0 - reply not ready.
– 1 - reply ready and valid.
– 0 - CAN standard rev 2.0 A (identifiers length = 11 bits).
– 1 - CAN standard rev 2.0 B (identifiers length = 29 bits).
V2.0 part A
V2.0 part B
IDT10
IDT12
IDT20
IDT28
31/23
31/23
IDT2
IDT4
15/7
R/W
15/7
R/W
-
-
-
-
30/22
IDT11
IDT19
IDT27
30/22
IDT1
IDT9
IDT3
14/6
R/W
14/6
R/W
-
-
-
-
29/21
IDT10
IDT18
IDT26
29/21
IDT0
IDT8
IDT2
13/5
R/W
13/5
R/W
-
-
-
-
28/20
IDT17
IDT25
28/20
12/4
IDT7
R/W
12/4
IDT1
IDT9
R/W
-
-
-
-
-
27/19
IDT16
IDT24
27/19
IDT6
IDT0
IDT8
11/3
R/W
11/3
R/W
-
-
-
-
-
RTRTAG
RTRTAG
26/18
IDT15
IDT23
26/18
10/2
IDT5
R/W
10/2
IDT7
R/W
-
-
-
-
RB1TAG
25/17
IDT14
IDT22
25/17
IDT4
R/W
IDT6
R/W
9/1
9/1
-
-
-
-
-
RB0TAG
RB0TAG
24/16
IDT13
IDT21
24/16
IDT3
R/W
IDT5
R/W
8/0
8/0
-
-
-
-
CANIDT4
CANIDT3
CANIDT2
CANIDT1
CANIDT4
CANIDT3
CANIDT2
CANIDT1
7647A–AVR–02/08