ELAN Home Systems EM78P459AM Special Purpose Registers, 13. RE, RF Interrupt Status Register

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EM78P458/459

OTP ROM

An 8-bit general-purpose register.

13. RE

A 2-bit, Bit 0 and Bit 1 register.

14. RF (Interrupt Status Register)

7

6

5

4

3

2

1

0

-

CMPIF

PWM2IF

PWM1IF

ADIF

EXIF

ICIF

TCIF

“1” means interrupt request, and “0” means no interrupt occurs.

•Bit 0 (TCIF) TCC overflow interrupt flag. Set when TCC overflows, reset by software.

•Bit 1 (ICIF) Port 6 input status change interrupt flag. Set when Port 6 input changes, reset by software.

•Bit 2 (EXIF) External interrupt flag. Set by falling edge on /INT pin, reset by software.

•Bit 3 (ADIF) Interrupt flag for analog to digital conversion. Set when AD conversion is completed, reset by software.

•Bit 4 (PWM1IF) PWM1 (Pulse Width Modulation) interrupt flag. Set when a selected period is reached, reset by software.

•Bit 5 (PWM2IF) PWM2 (Pulse Width Modulation) interrupt flag. Set when a selected period is reached, reset by software.

•Bit 6 (CMPIF) High-compared interrupt flag. Set when a change occurs in the output of Comparator, reset by software.

•Bit 7 Unemployed, read as ‘0’;

•RF can be cleared by instruction but cannot be set.

•IOCF0 is the interrupt mask register.

•Note that to read RF will result to "logic AND" of RF and IOCF0.

15.R10 ~ R3F

•All of these are 8-bit general-purpose registers.

4.2Special Purpose Registers

1.A (Accumulator)

•Internal data transfer, or instruction operand holding

•It can not be addressed.

This specification is subject to change without prior notice.

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07.01.2003 (V1.3)

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Contents BIT MICRO-CONTROLLER EM78P458/459Application Note EM78P458/459General Description Features EM78P458/459 PIN Assignment EM78P459 Pin Description Operational Registers Function DescriptionR0 Indirect Addressing Register R1 Time Clock /CounterProgram Counter Organization R4 RAM Select Register R3 Status RegisterR5 ~ R6 Port 5 ~ Port R7 ~ R8Data Memory Configuration RA Addata the converted value of ADC R9 Adcon Analog to Digital Control10. RB 11. RC13. RE Special Purpose RegistersRF Interrupt Status Register 15. R10 ~ R3FIOC50 ~ IOC60 I/O Port Control Register Control RegisterInte INT PAB PSR2 PSR1 PSR0 Bit 0 PSR0 ~ Bit 2 PSR2 TCC/WDT prescaler bitsOP2E OP1E IOC90 Gcon I/O Configuration & Control of ADCVrefs COE IMS2 IMS1 IMS0 CKR1 CKR0 IOCB0 Pull-down Control Register Description of AD Configuration Control BitsBit4Bit2 IMS2IMS0 IMS2IMS0IOCD0 Pull-high Control Register IOCC0 Open-Drain Control RegisterIOCF0 Interrupt Mask Register IOCE0 WDT Control RegisterWdte EIS Cmpie PWM2IE PWM1IE Adie Exie Icie TciePWM2E PWM1E T2EN T1EN IOC51 PwmconCALI1 SIGN1 IOC81 PRD1 Period of PWM1Bit 5Bit 3 VOF12VOF10 Offset voltage bits CALI2 SIGN2Bit 5Bit 3 VOF22VOF20 Offset voltage bits IOCB1 PRD2 Period of PWM2TCC/WDT & Prescaler I/O Ports Block Diagram of TCC and WDTCcircuit of I/O Port and I/O Control Register for Port Circuit of I/O Port and I/O Control Register for P60~P67 Function of Reset and Wake-up Reset and Wake-upUsage of Port 6 Input Changed Wake-up/Interrupt Function Contw CLR R1 Status of T, and P of Status Register Status of RST, T and P being Affected by Events Values of RST, T, and P after ResetInterrupt Interrupt Input Circuit Analog-To-Digital Converter ADCBIT Symbol Vrefs COE IMS2 IMS1 IMS0 CKR1 CKR0 BIT Symbol Iocs Adrun Adpd ADIS2 ADIS1 ADIS0ADC Control Register ADCON/R9, AD-CMP-CON/IOCA0, GCON/IOC90 ADCON/R9CKR1 and CKR0 Bit 1 and Bit 0 The conversion time select ADC Data Register ADDATA/RAGCON/IOC90 Shows the Gains and the Operating Range of ADCD Sampling Time D Operation During Sleep ModeD Conversion Time Programming Steps/ConsiderationsCINT== 0XF Demonstration ProgramsIocs Adrun Adpd ADIS2 ADIS1 ADIS0 Overview Dual Sets of PWM Pulse Width ModulationFunctional Block Diagram of the Dual PWMs Increment Timer Counter Tmrx TMR1H/TWR1L or TMR2H/TWR2LPWM Period Prdx PRD1 or PRD2 PWM Programming Procedures/StepsComparator Period = Prdx + 1 * 4 * 1/Fosc * Tmrx prescale valueFunction description TimerTMR1X and TMR2X TMR1H/TWR1L and TMR2H/TMR2L Prdx PRD1 and PRD2 PWM period registerExternal Reference Signal Timer programming procedures/stepsComparator Programming the Related RegistersWake-up from Sleep Mode Using as An Operation AmplifierInterrupt Summary of the Initialized Values for Registers Initialized Values after ResetCALI1 SIGN1 Oscillator Modes OscillatorSummary of Maximum Operating Speeds Crystal Oscillator/Ceramic Resonators XtalEM78P458 EM78P459LXT HXTEM78P458 EM78P459 VddExternal RC Oscillator Mode EM78P458 EM78P459 Vcc Rext RC Oscillator Mode with Internal CapacitorExternal Power on Reset Circuit Power-on ConsiderationsResidue-Voltage Protection EM78P458 EM78P459 RinEnwdt Clks PTB HLF RCT HLP Code Option Register WordBit 11 ~ Bit 9 VOF22~VOF20 Offset voltage bits Bit 5 ~ Bit 0 ID5~ID0 Customer’s IDList of the instruction set of EM78P458/459 Instruction SetADD A,R Reset Timing CLK=0 Timing DiagramsAC Test Input/Output Waveform TCC Input Timing CLKS=0Absolute Maximum Ratings Crystal type, two clocks Electrical CharacteristicsAC Electrical CharacteristicTa=0C ~ 70 C, VDD=5V±5%, VSS=0V ComparatorOP CharacteristicVdd = 5.0V,Vss=0V,Ta=0 toIVR Package Types AppendixOTP MCU DIP

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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