參數(shù)資料
型號(hào)： EM785842
廠商： ELAN Microelctronics Corp .
英文描述： 8-BIT MICRO-CONTROLLER
中文描述： 8位微控制器
文件頁數(shù)： 32/45頁
文件大小： 461K
代理商： EM785842
EM785840/5841/5842
8-bit Micro-controller
__________________________________________________________________________________________________________________________________________________________________
* This specification is subject to change without notice.
2004/11/10 V1.2
TMRX is cleared.
The PWMX pin is set to 1.
The PWM duty cycle is latched from DT1/DT2 to DTL1/DTL2.
< Note > The PWM output will not be set, if the duty cycle is 0;
The PWMXIF pin is set to 1.
The following formula describes how to calculate the PWM period:
PERIOD = (PRDX + 1) * 4 * (1/Fosc) * (TMRX prescale value )
Where Fosc is system clock
(4) PWM Duty Cycle ( DTX: DT1H/ DT1L; DTL: DL1H/DL1L)
The PWM duty cycle is defined by writing to the DTX register, and is latched from DTX to DLX while
TMRX is cleared. When DLX is equal to TMRX, the PWMX pin is cleared. DTX can be loaded at any
time. However, it cannot be latched into DTL until the current value of DLX is equal to TMRX.
The following formula describes how to calculate the PWM duty cycle:
Duty Cycle = (DTX) * (1/Fosc) * (TMRX prescale value)
(5) PWM Programming Procedures/Steps
Load PRDX with the PWM period.
(1) Load DTX with the PWM Duty Cycle.
(2) Enable interrupt function by writing IOCF PAFE0, if required.
(3) Set PWMX pin to be output by writing a desired value to IOCC PAGE0.
Load a desired value to R5 PAGE3 with TMRX prescaler value and enable both PWMX and TMRX.
(6) Timer
Timer1 (TMR1) and Timer2 (TMR2) (TMRX) are 10-bit clock counters with programmable prescalers,
respectively. This is designed for the PWM module as baud rate clock generators. TMRX can be read,
written, and cleared at any reset conditions.
The figure in the next page shows TMRX block diagram. Each signal and block are described as follows:
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EM785842M 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-BIT MICRO-CONTROLLER
EM785842P 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-BIT MICRO-CONTROLLER
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EM78612 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:Universal Serial Bus Microcontroller
EM78701 制造商:TE Connectivity 功能描述:
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