EM78P458/459

OTP ROM

PWM2

 

 

* Defined by PWMCON (IOC51)<6, 7>

VREF

15

I

* External reference voltage for ADC

* Defined by AD-CMPCON (IOCA0)<7>.

 

 

 

CIN-, CIN+,

 

I

* “-“ -> the input pin of Vin- of the comparator.

20, 1,2

* “+”-> the input pin of Vin+ of the comparator.

CO

O

* Pin CO is the output of the comparator.

 

 

 

 

* Defined by AD-CMPCON (IOCA0) <5, 6>

TCC

19

I

* Real time clock/counter with Schmitt trigger input pin; it must be tied to

VDD or VSS if it is not in use.

 

 

 

VSS

5

-

Ground.

Table 2 EM78P459 Pin Description

 

Symbol

Pin No.

Type

 

Function

 

 

 

 

 

 

 

 

 

VDD

19, 18

-

Power supply.

 

 

 

OSCI

22

I

* XTAL type: Crystal input terminal or external clock input pin.

 

* RC type: RC oscillator input pin.

 

 

 

 

 

 

 

 

 

 

* XTAL type: Output terminal for crystal oscillator or external clock input

 

OSCO

21

O

pin.

 

 

 

* RC type: Clock output with a period of one instruction cycle time, the

 

 

 

 

prescaler is determined by the CONT register.

 

 

 

 

 

* External clock signal input.

 

 

P50

14

I

* General-purpose Input only.

 

 

* Default value while power-on reset.

 

 

 

 

 

 

 

 

15~17

 

* General-purpose I/O pin.

 

 

P51 ~ P57

23, 24

I/O

 

 

* Default value while power-on reset.

 

 

 

1, 2

 

 

 

 

 

 

 

 

 

P60 ~ P67

3, 4,

I/O

* General-purpose I/O pin.

 

 

8~13

* Default value while power-on reset.

 

 

 

 

 

 

INT

14

I

* External interrupt pin triggered by falling edge.

 

 

ADC1~ADC8

3, 4,

I

* Analog to Digital Converter.

 

 

8~13

* Defined by AD-CMPCON (IOCA0)<2:4>.

 

 

 

 

 

 

PWM1,

15, 16

O

* Pulse width modulation outputs.

 

 

PWM2

* Defined by PWMCON (IOC51)<6, 7>

 

 

 

 

 

 

VREF

17

I

* External reference voltage for ADC

 

 

* Defined by AD-CMPCON (IOCA0)<7>.

 

 

 

 

 

 

 

 

 

 

* ‘-’ -> the Vin- input pins of the comparators.

 

 

CIN-, CIN+,

24, 1, 2

I

* ‘+’ -> the Vin+ input pins of the comparators.

 

 

CO

* Pin CO is the output of the comparator.

 

 

 

 

 

 

 

 

 

* Defined by AD-CMPCON (IOCA0) <5, 6>

 

 

 

 

 

* If it remains at logic low, the device will be reset.

 

 

/RESET

20

I

* Wake up from sleep mode when pins status changes.

 

 

* Voltage on /RESET/Vpp must not be over Vdd during normal mode.

 

 

 

 

 

 

 

 

* Pull-high is on if /RESET is asserted.

 

 

TCC

23

I

* Real time clock/counter with Schmitt trigger input pin; it must be tied to

 

VDD or VSS if it is not in use.

 

 

 

 

 

 

 

ENTCC

5

I

1: Enable TCC; 0: Disable TCC.

 

 

VSS

6, 7

-

Ground.

 

 

 

 

 

This specification is subject to change without prior notice.

7

07.01.2003 (V1.3)

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ELAN Home Systems EM78P459AM, EM78P459AK, EM78P458AM, EM78P458AP manual EM78P459 Pin Description
Page 6 Page 8

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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