参数资料
型号: MC68HC705CT4FN
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.048 MHz, MICROCONTROLLER, PQCC44
封装: PLASTIC, LCC-44
文件页数: 150/152页
文件大小: 668K
代理商: MC68HC705CT4FN
Pulse Width Modulator (PWM)
PWM During Wait Mode
MC68HC705CT4 Rev. 2.0
General Release Specification
MOTOROLA
Pulse Width Modulator (PWM)
97
NON-DISCLOSURE
AGREEMENT
REQUIRED
12.5 PWM During Wait Mode
The PWM continues normal operation during wait mode. To decrease
power consumption during WAIT, it is recommended that the PWME bit
in the miscellaneous control register be cleared if the PWM D/A
converter is not being used.
12.6 PWM During Stop Mode
In stop mode, the oscillator is stopped, causing the PWM to cease
function. Any signal in process is halted in whatever phase the signal
happens to be in. Disabling the PWM before executing the STOP
instruction is recommended.
12.7 PWM During Reset
Upon reset the PWME bit is cleared. In effect, this disables the PWM
system and configures the PC7/PWM pin as a high impedance port C
input pin. The user should write to the data register prior to enabling the
PWM system (for instance, prior to setting PWME). This avoids an
erroneous duty cycle from being driven.
12.8 PWM Power Supply Source
The PWM is supplied by VDD and VSS, due to the noise generated by the
digital circuitry, since this module is not affected by supply noise.
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