EM78P458/459

OTP ROM

4.9Timer

1.Overview

Timer1 (TMR1) and Timer2 (TMR2) (TMRX) are 10-bit clock counters with programmable prescalers, respectively. They are designed for the PWM module as baud rate clock generators. TMRX can be read, written, and cleared at any reset conditions.

2. Function description

Fig. 15 shows TMRX block diagram. Each signal and block are described as follows:

Fosc 1:2

1:8

1:32 MUX 1:64

T1P0 T1P1T1EN

TMR1X

To PWM1IF

reset

Period

Match

Comparator

Data Bus

PRD1

Data Bus

PRD2

T2P0 T2P1 T2EN

Fosc 1:2

1:8

1:32 MUX 1:64

TMR2X

Comparator

reset

Period

Match

 

To PWM2IF

*TMR1X = TMR1H + TMR1L; *TMR2X = TMR2H +TMR2L

Fig. 15 TMRX Block Diagram

Fosc: Input clock.

Prescaler ( T1P0 and T1P1/T2P1 and T2P0 ): Options of 1:2, 1:8, 1:32, and 1:64 are defined by TMRX. It is cleared when any type of reset occurs.

TMR1X and TMR2X (TMR1H/TWR1L and TMR2H/TMR2L ):

Timer X register; TMRX is

increased until it matches with PRDX, and then is reset to 0. TMRX cannot be read.

PRDX ( PRD1 and PRD2 ): PWM period register.

 

 

 

 

This specification is subject to change without prior notice.

40

07.01.2003 (V1.3)

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ELAN Home Systems EM78P458, EM78P459AK, EM78P459AM Timer, Function description, TMR1X and TMR2X TMR1H/TWR1L and TMR2H/TMR2L
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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.
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