msm9225 Oki Semiconductor, msm9225 Datasheet - Page 16

• Manufacturer Part Number: msm9225
• Description: Can Controller Area Network Controller
• Manufacturer: Oki Semiconductor

3. Number of messages specification register (NMES: 1Ehex)
4. CAN bus timing register 0 (BTR0: 1Fhex)
¡ Semiconductor
Address MSB
This is a register to set the number of messages to be stored in the message memory.
A maximum of 16 messages can be set, with message numbers 0 to 15.
Writing to NMES is enabled when initialize bit INIT of the CAN control register (CANC:
OEhex) is "1".
At reset, NMES is set to "0000".
The bit configuration and relationship between message number and number of messages
are as follows:
This register sets the baud rate prescaler and synchronization jump width (SJW) used for bus
timing. Writing to the BTR0 bit is enabled, when the INIT bit of the CAN control register
(CANC: 0Ehex) is "1".
The bit configuration is as follows:
1Eh
1Fh
*
Address MSB
*
* * * *
* * * *
* * * *
* * * *
·
·
: Don't Care
* * *
·
·
7
·
·
6
·
·
5
NMES3
0
0
1
1
4
·
·
3
NMES2
2
0
0
1
1
·
·
1
LSB
NMES1
0
0
0
1
1
·
·
BRP0 :
BRP1 :
BRP2 :
BRP3 :
BRP4 :
BRP5 :
SJWA :
SJWB :
NMES0
0
0
0
1
·
·
LSB
Baud rate
prescaler
Synchronization
Jump Width
Number of message
15
16
1
2
MSM9225
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