Manuals / ELAN Home Systems / Computer Equipment / Network Card

ELAN Home Systems EM78P459AM, EM78P459AK manual Dual Sets of PWM Pulse Width Modulation, Overview

Models: EM78P458 EM78P459AM EM78P458AM EM78P459AK EM78P459 EM78P458AP

1 60
Download 60 pages 23.82 Kb
Page 37
Image 37

 

EM78P458/459

 

OTP ROM

 

 

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, @0BXXXXXXX1

; 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.

This specification is subject to change without prior notice.

37

07.01.2003 (V1.3)

Page 36 Page 38
Page 37
Image 37
ELAN Home Systems EM78P459AM, EM78P459AK, EM78P458AM, EM78P458AP manual Dual Sets of PWM Pulse Width Modulation, Overview
Page 36 Page 38

EM78P458, EM78P459AM, EM78P458AM, EM78P459AK, EM78P459 specifications

ELAN Home Systems offers a range of advanced microcontrollers, including the EM78P458AP, EM78P459, EM78P459AK, EM78P458AM, and EM78P459AM, that cater to various applications in the consumer electronics sector. These microcontrollers are known for their high efficiency, low power consumption, and robust performance, making them ideal for a wide range of smart home devices.

The EM78P458AP and EM78P459 models feature an 8-bit architecture, enabling efficient processing for applications requiring moderate complexity. They are equipped with a variety of I/O options, including GPIO, UART, and ADC, facilitating seamless integration with numerous peripherals. This flexibility allows developers to create customized solutions tailored to specific user needs.

One of the main highlights of these microcontrollers is their low-power operation, which is essential for battery-operated devices. This is particularly appealing in smart home contexts, where devices are expected to maintain long operational lifetimes without frequent battery replacements. The EM78P458AP and EM78P459 series prioritize energy efficiency, ensuring that they consume minimal power during both active and idle states.

In terms of memory, these microcontrollers also provide substantial ROM and RAM capacities, which enhance their ability to handle complex programs and data. The EM78P459AK variant adds additional features that empower developers with greater flexibility in terms of code storage and execution.

Another critical aspect of these microcontrollers is their built-in protection mechanisms, including voltage and thermal protection, which ensure safe operations under varying environmental conditions. This is vital for home automation systems, where device reliability is paramount to user satisfaction.

The EM78P458AM and EM78P459AM models further extend the family with added functionalities, such as enhanced communication capabilities featuring protocols like I2C and SPI. This facilitates robust inter-device communication, making it easier to integrate various smart home devices into a cohesive network.

Overall, ELAN Home Systems’ EM78P458 and EM78P459 series microcontrollers stand out for their versatile application potential, low power consumption, and reliability. With their innovative technologies and characteristics, they are well-suited for driving the next generation of smart home solutions, ensuring convenience, efficiency, and connectivity for users worldwide.