參數(shù)資料
型號: MC68HC705X4
廠商: Motorola, Inc.
英文描述: HCMOS Microcontroller Unit
中文描述: HCMOS微控制器
文件頁數(shù): 92/156頁
文件大?。?/td> 926K
代理商: MC68HC705X4
Motorola CAN
MC68HC05X4
92
Motorola CAN
MOTOROLA
MCAN output
control register
(COCNTRL)
This register allows the setup of different output driver configurations
under software control. The user may select active pull-up, pull-down,
float or push-pull output.
NOTE:
This register can be accessed only when the RR bit in CCNTRL is set.
OCM1 and OCM0 — Output control mode bits
The values of these two bits determine the output mode, as shown in
Table 4
.
NOTE:
The transmit clock (t
xclk
) is used to indicate the end of the bit time and will
be high during the SYNC_SEG.
For all the following modes of operation, a dominant bit is internally
coded as a zero, a recessive as a one. The other output control bits are
used to determine the actual voltage levels transmitted to the MCAN bus
for dominant and recessive bits.
Address:
$0028
Bit 7
6
5
4
3
2
1
Bit 0
OCTP1
OCTN1
OCPOL1
OCTP0
OCTN0
OCPOL0
OCM1
OCM0
Reset:
Undefined
Figure 14. MCAN Output Control (COCNTRL)
Table 4. Output control modes
OCM1
0
0
OCM0
0
1
Function
Biphase mode
Not used
Normal mode 1
Bit stream transmitted on both TX0 and
TX1
Normal mode 2
TX0 – bit sequence
TX1 – bus clock (t
xclk
)
1
0
1
1
24-mcan
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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