MEGA128CAN Datasheet, PDF (259/413 Pages) ATMEL Corporation – Microcontroller WITH 128K BYTES OF ISP FLASH AND CAN CONTROLLER

AT90CAN128
• Bit 0 – IDEMSK: Identifier Extension Mask
– 0 - comparison true forced
– 1 - bit comparison enabled.
V2.0 part B • Bit 31:3 – IDMSK28:0: Identifier Mask
– 0 - comparison true forced
– 1 - bit comparison enabled.
• Bit 2 – RTRMSK: Remote Transmission Request Mask
– 0 - comparison true forced
– 1 - bit comparison enabled.
• Bit 1 – Reserved Bit
Writing zero in this bit is recommended.
CAN Time Stamp Registers -
CANSTML and CANSTMH
• Bit 0 – IDEMSK: Identifier Extension Mask
– 0 - comparison true forced
– 1 - bit comparison enabled.
Bit
7
6
5
4
3
2
1
0
TIMSTM7 TIMSTM6 TIMSTM5 TIMSTM4 TIMSTM3 TIMSTM2 TIMSTM1 TIMSTM0 CANSTML
TIMSTM15 TIMSTM14 TIMSTM13 TIMSTM12 TIMSTM11 TIMSTM10 TIMSTM9 TIMSTM8 CANSTMH
Bit
15
14
13
12
11
10
9
8
Read/Write
R
R
R
R
R
R
R
R
Initial Value
-
-
-
-
-
-
-
-
• Bits 15:0 - TIMSTM15:0: Time Stamp Count
CAN time stamp counter range 0 to 65,535.
CAN Data Message Register -
CANMSG
Bit
Read/Write
Initial Value
7
MSG 7
R/W
-
6
MSG 6
R/W
-
5
MSG 5
R/W
-
4
MSG 4
R/W
-
3
MSG 3
R/W
-
2
MSG 2
R/W
-
1
MSG 1
R/W
-
0
MSG 0
R/W
-
CANMSG
• Bit 7:0 – MSG7:0: Message Data
This register contains the CAN data byte pointed at the page MOb register.
After writing in the page MOb register, this byte is equal to the specified message loca-
tion of the pre-defined identifier + index. If auto-incrementation is used, at the end of the
data register writing or reading cycle, the index is auto-incremented.
The range of the counting is 8 with no end of loop (0, 1,..., 7, 0,...).
4250E–CAN–12/04
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