st92f124 STMicroelectronics, st92f124 Datasheet - Page 348

• Manufacturer Part Number: st92f124
• Description: 8/16-bit Single Voltage Flash Mcu Family With Ram, E3 Tmemulated Eeprom, Can 2.0b And J1850 Blpd
• Manufacturer: STMicroelectronics

CONTROLLER AREA NETWORK (bxCAN)
CONTROLLER AREA NETWORK (Cont’d)
CAN BIT TIMING REGISTER 0 (CBTR0)
This register can only be accessed by the software
when the CAN hardware is in configuration mode.
Read / Write
Reset Value: 0000 0000 (00h)
Bit 7:6 SJW[1:0] Resynchronization Jump Width
These bits define the maximum number of time
quanta the CAN hardware is allowed to lengthen
or shorten a bit to perform the resynchronization.
Bit 5:0 BRP[5:0] Baud Rate Prescaler
These bits define the length of a time quantum.
tq = (BRP+1)/fsys
For more information on bit timing, please refer to
Section 10.10.5.7 Bit
CAN BIT TIMING REGISTER 1 (CBTR1)
Read / Write
Reset Value: 0001 0011 (23h)
Bit 7 = Reserved. Forced to 0 by hardware.
Bit 6:4 TS2[2:0] Time Segment 2
These bits define the number of time quanta in
Time Segment 2.
t
Bit 3:0 TS1[3:0] Time Segment 1
These bits define the number of time quanta in
Time Segment 1
t
.For more information on bit timing, please refer to
Section 10.10.5.7 Bit
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9
BS2
BS1
SJW1 SJW0 BRP5
7
7
0
= t
= t
CAN
CAN
TS22
x (TS2[2:0] + 1),
x (TS1[3:0] + 1)
TS21
BRP4
TS20
Timing.
Timing.
BRP3
TS13
BRP2
TS12
BRP1
TS11
BRP0
TS10
0
0
CAN FILTER PAGE SELECT REGISTER
(CFPSR)
All bits of this register are set and cleared by soft-
ware.
Read / Write
Reset Value: 0000 0000 (00h)
Bit 7:3 = Reserved. Forced to 0 by hardware.
Bit 2:0 = FPS[2:0] Filter Page Select
- Read/Write
This register contains the filter page number avail-
able in page 54.
Table 64. Filter Page Selection
FPS[2:0]
7
0
0
1
2
3
4
5
6
7
0
Acceptance Filter 0:1
Acceptance Filter 2:3
Acceptance Filter 4:5
Acceptance Filter 6:7
Filter Configuration
Filter Configuration
Filter Configuration
Filter Configuration
0
Filter Page Selected in Page 54
0
0
FPS2
FPS1
FPS0
0