EM78459AM datasheet(16/62 Pages) EMC

16 / 62 page

EM78458/459

8-Bit Microcontroller with MASK ROM

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Product Specification (V1.4) 05.27.2005

(This specification is subject to change without further notice)

4.1.11

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

4.1.12

An 8-bit general-purpose register.

4.1.13

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

4.1.14

RF (Interrupt Status Register)

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.

4.2.15

R10 ~ R3F

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

EM78459AM Datasheet(PDF) 16 Page - ELAN Microelectronics Corp

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