msm9225 Oki Semiconductor, msm9225 Datasheet - Page 18

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

5. CAN bus timing register 1 (BTR1: 2Ehex)
¡ Semiconductor
(1) Time segment 1: TSEG13 to TSEG10
(2) Time segment 2: TSEG22 to TSEG20
This register sets the sampling count, sampling point and transmit point used for bus timing.
Writing to the BTR1 bit is enabled, when the INIT bit of the CAN control register (CANC:
0Ehex) is "1".
The bit configuration is as follows:
This is a 4-bit register to set the sampling point.
The relationship between bit content and TSEG1 is as follows:
At reset, TSEG13 to TSEG10 are set to "0000".
This is a 3-bit register to set the transmit point.
The relationship between the bit content and TSEG2 is as follows:
At reset, TSEG22 to TSEG20 are set to "000".
TSEG22
TSEG13
0
0
1
1
0
0
1
1
·
·
·
·
2Eh
Address MSB
TSEG21
TSEG12
0
0
1
1
0
0
1
1
·
·
·
·
7
6
TSEG20
TSEG11
0
1
0
1
0
0
1
1
·
·
·
·
5
4
TSEG10
3
1 ¥ BTL cycle
2 ¥ BTL cycle
7 ¥ BTL cycle
8 ¥ BTL cycle
0
1
0
1
·
·
TSEG2
2
·
·
1
15 ¥ BTL cycle
16 ¥ BTL cycle
1 ¥ BTL cycle
2 ¥ BTL cycle
TSEG1
LSB
0
·
·
TSEG10 :
TSEG11 :
TSEG12 :
TSEG13 :
TSEG20 :
TSEG21 :
TSEG22 :
Not used :
Time
segment 1
Time
segment 2
MSM9225
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