EM78P458/459

OTP ROM

8. R9 (ADCON: Analog to Digital Control)

7

6

5

4

3

2

1

0

-

-

IOCS

ADRUN

ADPD

ADIS2

ADIS1

ADIS0

Bit 7:Bit 6 Unemployed, read as ‘0’;

Bit 5(IOCS): Select the Segment of IO control register. 1 = Segment 1 ( IOC51~IOCF1 ) selected;

0 = Segment 0 ( IOC50~IOCF0 ) selected;

Bit 4 (ADRUN): ADC starts to RUN.

1 = an A/D conversion is started. This bit can be set by software;

0 = reset on completion of the conversion. This bit can not be reset though software;

Bit 3 (ADPD): ADC Power-down mode. 1 = ADC is operating;

0 = switch off the resistor reference to save power even while the CPU is operating.

Bit2:Bit0 (ADIS2:ADIS0): Analog Input Select.

000 = AN0;

001 = AN1;

010 = AN2;

011 = AN3;

100 = AN4;

101 = AN5;

110 = AN6;

111 = AN7;

They can only be changed when the ADIF bit and the ADRUN bit are both LOW.

9. RA (ADDATA: the converted value of ADC)

When the A/D conversion is complete, the result is loaded into the ADDATA. The START//END bit is cleared, and the ADIF is set.

10. RB

An 8-bit general-purpose register.

11. RC

A 2-bit, Bit 0and Bit 1 register.

12. RD

This specification is subject to change without prior notice.

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07.01.2003 (V1.3)

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ELAN Home Systems EM78P459AK R9 Adcon Analog to Digital Control, RA Addata the converted value of ADC, 10. RB, 11. RC

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.