3. PIN ASSIGNMENT

EM78P458/459

OTP ROM

P56/CIN+

P57/CO

1

24

2

23

P55/CIN-

P54/TCC

P56/CIN+

P57/CO

P60/ADC1

P61/ADC2

VSS

P62/ADC3

P63/ADC4

P64/ADC5

P65/ADC6

P66/ADC7

1 20

219

318

417

5EM78P458 16

615

714

813

912

1011

P55/CIN-

P54/TCC

OSCI

OSCO

VDD

P53/VREF

P52/PWM2

P51/PWM1

P50/INT

P67/ADC8

P60/ADC1

P61/ADC2

ENTCC

VSS

VSS

P62/ADC3

P63/ADC4

P64/ADC5

P65/ADC6

P66/ADC7

3

 

22

4

 

21

5

EM78P459

20

6

19

7

18

8

17

 

9

 

16

10

 

15

11

 

14

12

 

13

OSCI

OSCO

RESET

VDD

VDD

P53/VREF

P52/PWM2

P51/PWM1

P50/INT

P67/ADC8

 

 

 

 

Fig. 1 Pin Assignment

 

Table 1 EM78P458 Pin Description

 

 

 

 

 

 

 

 

 

 

Symbol

Pin No.

Type

 

Function

 

 

 

 

 

 

 

 

 

VDD

16

-

Power supply.

 

 

 

OSCI

18

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

17

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

12

I

* General-purpose Input only.

 

 

* Default value while power-on reset.

 

 

 

 

 

 

 

P51 ~ P57

13~15

I/O

* General-purpose I/O pin.

 

 

19, 20,

 

 

* Default value while power-on reset.

 

 

 

1, 2

 

 

 

 

 

 

 

 

 

P60 ~ P67

3, 4,

I/O

* General-purpose I/O pin.

 

 

6~11

* Default value while power-on reset.

 

 

 

 

 

 

INT

12

I

* External interrupt pin triggered by falling edge.

 

 

ADC1~ADC8

3, 4,

I

* Analog to Digital Converter.

 

 

6 ~ 11

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

 

 

 

 

 

 

PWM1,

13, 14

O

* Pulse width modulation outputs.

 

 

 

 

This specification is subject to change without prior notice.

6

07.01.2003 (V1.3)

Page 6
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ELAN Home Systems EM78P459AK, EM78P459AM, EM78P458AM, EM78P458AP manual PIN Assignment

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.