Summary of Maximum Operating Speeds | ELAN Home Systems EM78P458

EM78P458/459

OTP ROM

MASK Option. The up-limited operation frequency of crystal/resonator on the different VDDs is listed

in Table 11

Table 12 The Summary of Maximum Operating Speeds

Conditions	VDD	Fxt max.(MHz)
Two clocks	2.3	4
Two clocks	3.0	8
	5.0	20

2. Crystal Oscillator/Ceramic Resonators (XTAL)

EM78P458/459 can be driven by an external clock signal through the OSCI pin as shown in Fig. 18 below.

	OSCI	Ext.
	OSCI	Clock
		Clock

EM78P458

EM78P459

OSCO

Fig. 18 Circuit for External Clock Input

In the most applications, pin OSCI and pin OSCO can be connected with a crystal or ceramic resonator to generate oscillation. Fig. 19 depicts such circuit. The same applies to the HXT mode and the LXT mode. Table 12 provided the recommended values of C1 and C2. Since each resonator has its own attribute, user should refer to their specifications for appropriate values of C1 and C2. RS, a serial resistor, may be necessary for AT strip cut crystal or low frequency mode.

OSCI
EM78P458	XTAL
EM78P459	XTAL

OSCO

Fig. 19 Circuit for Crystal/Resonator

This specification is subject to change without prior notice.

07.01.2003 (V1.3)

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.

ELAN Home Systems EM78P458, EM78P459AK, EM78P459AM Crystal Oscillator/Ceramic Resonators Xtal

Models: EM78P458 EM78P459AM EM78P458AM EM78P459AK EM78P459 EM78P458AP