Rainbow Electronics ATmega64C1 - Manual (Page 196)

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7647A–AVR–02/08
ATmega32/64/M1/C1
– 0 - reply not ready.
– 1 - reply ready and valid.
• 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.
– 0 - CAN standard rev 2.0 A (identifiers length = 11 bits).
– 1 - CAN standard rev 2.0 B (identifiers length = 29 bits).
• 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.
16.11.3 CAN Identifier Tag Registers -
CANIDT1, CANIDT2, CANIDT3, and CANIDT4
V2.0 part A
V2.0 part B
V2.0 part A
• 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
Bit 15/7 14/6 13/5 12/4 11/3 10/2 9/1 8/0
- - - - - RTRTAG - RB0TAG CANIDT4
- - - - - - - - CANIDT3
IDT2 IDT1 IDT0 - - - - - CANIDT2
IDT10 IDT9 IDT8 IDT7 IDT6 IDT5 IDT4 IDT3 CANIDT1
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
IDT4 IDT3 IDT2 IDT1 IDT0 RTRTAG RB1TAG RB0TAG CANIDT4
IDT12 IDT11 IDT10 IDT9 IDT8 IDT7 IDT6 IDT5 CANIDT3
IDT20 IDT19 IDT18 IDT17 IDT16 IDT15 IDT14 IDT13 CANIDT2
IDT28 IDT27 IDT26 IDT25 IDT24 IDT23 IDT22 IDT21 CANIDT1
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 - - - - - - - -