參數(shù)資料
型號(hào)： MPC555
廠商： Motorola, Inc.
元件分類： 32位微控制器
英文描述： Highly Integrated, Low-Power, 32-Bit Microcontroller
中文描述： 高度集成，低功耗，32位微控制器
文件頁(yè)數(shù)： 17/32頁(yè)
文件大?。?/td> 219K
代理商： MPC555
Application Note
Using the MPC555 as a Signal Generator
AN1778
MOTOROLA
17
Type this line for channel 0 for a 50 percent duty cycle.
write -w 0x306002 = 0x0001
Do the same for channel 2:
write -w 0x306012 = 0x0001
PWM
Status/C ontrol
Register
(MPWMSMSC R)
The last eight bits of this register (MPWMSMSCR) set the clock divider
for the particular PWM channel. This divider operates on the MIOS clock
whose frequency was set in
PWM Reference Clock
.
Each PWM channel can use a divider to slow the MIOS counter clock.
NOTE:
Remember that this will also affect the period and pulse width registers.
Figure 6
shows the bit assignments for this register and
Table 3
describes the assignments.
Figure 6. MPWMSW Status/Control Register (MPWMSMSCR) 0x30 6006
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LSB
15
PIN
RESET:
DDR
FREN TRSP
POL
EN
RESERVED
CP
—
0
0
0
0
0
0
0
U
U
U
U
U
U
U
U
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