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參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 30/32頁 |
| 文件大?。?/td> | 219K |
| 代理商： | MPC555 |
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Application Note
AN1778
30
MOTOROLA
init.dbg script
# Set IMB to full speed -- can only be set back to the default
#half speed with Power On Reset on power up
#(Table 12-6)
write -l 0x307f80=0x0
# Turn on the time base for interrupt generation
#(Table 6-16)
write -w 0x2fc200 = 0x0001
# Sets the slew rate of the MIOS to fast, 200 ns default
with Pull Up/Down resistors off.
#(Table 2-3)
write -l 0x2fc03c = 0x13000000
# To return to slow rise/fall time on MIOS
write -l 0x2fc03c = 0x03000000
Other Miscellaneous Initialization Registers for Reference
# Turn off serialization for benchmarking purposes
#Note that the ICTRL (SPR158) register defaults to 0 on reset
@ SPR158 = 0x7
#To verify:
echo $SPR158
# Set clock speed to 40 MHz
write -l 0x2fc284 = 0x0091c000
# Set clock speed to 20 MHz
write -l 0x2fc284 = 0x0041c000
Configuring the PWM Channels
# ALL CHANNELS
# Status and Control for MCPSM (main clock
# divider for MIOS i.e. main divider for all
# PWM's
write -w 0x306816 = 0x8002
###############################################################
#CHANNEL 0
# PWM Period Register (Resolution of waveform)
write -w 0x306000 = 0x0002
# PWM Pulse Width Register (How many periods --
# from above-- that are high)
write -w 0x306002 = 0x0001
# PWM Status and control (Divider per PWM)
write -w 0x306006 = 0x54ff
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