EM78P458/459

OTP ROM

 

3.3k

1.43 MHz

1.35 MHz

100 pF

5.1k

980 KHz

877 KHz

10k

520 KHz

465 KHz

 

 

100k

57 KHz

54 KHz

 

3.3k

510 KHz

470 KHz

300 pF

5.1k

340 KHz

320 KHz

10k

175 KHz

170 KHz

 

 

100k

19 KHz

19 KHz

<Note> 1. Measured on DIP packages.

2.Design reference only

4.RC Oscillator Mode with Internal Capacitor

If both precision and cost are taken into consideration, EM78P257A/B also offers a special oscillation mode. It is equipped with an internal capacitor and an external resistor (connected to Vcc). The internal capacitor functions as temperature compensator. In order to obtain more accurate frequency, a precise resistor is recommended.

OSCI

EM78P458

EM78P459

Vcc

Rext

Fig. 23 Circuit for Internal C Oscillator Mode

Table 15 R Oscillator Frequencies

Rext

 

Average Fosc 5V,25°C

Average Fosc 3V,25°C

 

 

 

 

51k

 

2.22 MHz

2.17 MHz

100k

 

1.15 MHz

1.14 MHz

300k

 

375 KHz

370 KHz

<Note>

1.

Measured on DIP packages.

 

 

2.

Design reference only

 

This specification is subject to change without prior notice.

49

07.01.2003 (V1.3)

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Image 49
ELAN Home Systems EM78P459AM, EM78P459AK, EM78P458AM RC Oscillator Mode with Internal Capacitor, EM78P458 EM78P459 Vcc Rext

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.