参数资料
型号: XC68HC705X4DW
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.2 MHz, MICROCONTROLLER, PDSO28
封装: SOIC-28
文件页数: 156/168页
文件大小: 656K
代理商: XC68HC705X4DW
Motorola CAN
MC68HC05X4
88
Motorola CAN
MOTOROLA
MCAN bus timing
register 0 (CBT0)
NOTE:
This register can be accessed only when the RR bit in CCNTRL is set.
SJW1, SJW0 — Synchronization jump width bits
The synchronization jump width defines the maximum number of
system clock (tSCL) cycles by which a bit may be shortened, or
lengthened, to achieve resynchronization on data transitions on the
bus (see Table 1).
BRP5 – BRP0 — Baud rate prescaler bits
These bits determine the MCAN system clock cycle time (tSCL), which
is used to build up the individual bit timing, according to Table 2 and
the formula in Figure 11.
Address:
$0026
Bit 7
654321
Bit 0
SJW1
SJW0
BRP5
BRP4
BRP3
BRP2
BRP1
BRP0
Reset:
Undened
Figure 10. MCAN Bus Timing 0 (CBT0)
Table 1. Synchronization jump width
SJW1
SJW0
Synchronization jump width
0
1 tSCL cycle
0
1
2 tSCL cycles
1
0
3 tSCL cycles
1
4 tSCL cycles
Table 2. Baud rate prescaler
BRP5
BRP4
BRP3
BRP2
BRP1
BRP0
Prescaler value (P)
0
00000
1
0
00001
2
0
00010
3
0
00011
4
:
:::::
:
:::::
:
1
11111
64
20-mcan
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