EM78P458/459

OTP ROM

•The compared result is stored in the CMPOUT of R3.

•The comparator outputs is output to P57 by programming bit5<COE> of the AD-CMPCON register to 1.

•P57 must be defined as an output if implemented as the comparator output.

•Fig. 17 shows the comparator output block diagram.

To C0

To CMPOUT

CMRD

EN

QD

RESET

From OP I/O

CMRD

EN

Q D

To CPIF

From other comparator

Fig. 17 The Output Configuration of a Comparator

3. Using as An Operation Amplifier

The comparator can be used as an operation amplifier if a feedback resistor is connected from the input to the output externally. In this case, the Schmitt trigger can be disabled for power saving by setting CE to 1 and COE to 0.

4.Interrupt

•CMPIE (IOCF0.6) must be enabled.

•Interrupt occurs at the rising edge of the comparator output pin.

•The actual change on the pin can be determined by reading the Bit CMPOUT, R3<7>.

•CMPIF (RF.6), the comparator interrupt flag, can only be cleared by software.

5.Wake-up from SLEEP Mode

This specification is subject to change without prior notice.

42

07.01.2003 (V1.3)

Page 41 Page 43
Page 42
Image 42
ELAN Home Systems EM78P459AK, EM78P459AM, EM78P458AM Using as An Operation Amplifier, Interrupt, Wake-up from Sleep Mode
Page 41 Page 43

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.
Top Page Image Contents