參數(shù)資料
型號： EM78450
英文描述： Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0&degC to 70°C; Package: 16-QFN
中文描述： 8位微控制器的通用產(chǎn)品
文件頁數(shù)： 29/57頁
文件大?。?/td> 854K
代理商： EM78450
EM78458/459
MASK ROM
This specification is subject to change without prior notice.
2002/03/01
35
CONTW
MOV A, @0b00000000
; To employ Vdd as the reference voltage, to define P60 as
IOW ADCONC
; an analog input and set clock rate at fosc/4
En_ADC:
MOV A, @0xXXXXXXX1
; To define P60 as an input pin, and the others are dependent
IOW PORT6
; on applications
MOV A, @0b01000101
; To enable the OP1, and set the gain as 32
IOW GCON
BS ADCONR, ADPD
; To disable the power-down mode of ADC
ENI
; Enable the interrupt function
BS ADCONR, ADRUN
; Start to run the ADC
; If the interrupt function is employed, the following three lines may be ignored
POLLING:
JBC ADCONR, ADRUN
; To check the ADRUN bit continuously;
JMP POLLING
; ADRUN bit will be reset as the AD conversion is completed
(User program)
:
4.8 Dual Sets of PWM ( Pulse Width Modulation )
1. Overview
In PWM mode, both PWM1 and PWM2 pins produce up to a 10-bit resolution PWM output (see. Fig.
13 for the functional block diagram). A PWM output has a period and a duty cycle, and it keeps the
output in high. The baud rate of the PWM is the inverse of the period. Fig. 14 depicts the relationships
between a period and a duty cycle.
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