EM78458AM datasheet(32/62 Pages) EMC

32 / 62 page

EM78458/459

8-Bit Microcontroller with MASK ROM

•

Product Specification (V1.4) 05.27.2005

(This specification is subject to change without further notice)

Table 5 The Status of RST, T and P being Affected by Events

Event

Power-on

WDTC instruction

WDT time-out

SLEP instruction

Wake-up on pin changed during SLEEP mode

*P: Previous value before reset

WDT Timeout

Oscillator

CLK

CLR

WDT

VDD

Setup time

Reset

CLK

/RESET

Power-On Reset

Voltage Detector

Fig. 10 Block Diagram of Reset of Controller

4.6

Interrupt

The EM78458/459 has six interrupts as listed below:

(1) TCC overflow interrupt

(2) Port 6 Input Status Change Interrupt

(3) External interrupt [(P50, /INT) pin].

(4) Analog to Digital conversion completed.

(5) When TMR1/TMR2 matches with PRD1/PRD2 respectively in PWM.

(6) When the comparators output changes.

Before the Port 6 Input Status Change Interrupt is enabled, reading Port 6 (e.g. "MOV

R6,R6") is necessary. Each Port 6 pin will have this feature if its status changes. Any

pin configured as output or P50 pin configured as /INT, is excluded from this function.

Port 6 Input Status Change Interrupt will wake up the EM78458/459 from the sleep

mode if it is enabled prior to going into the sleep mode by executing SLEP. When the

controller is wake-up, it will continue to execute the succeeding program if the global

EM78458AM Datasheet(PDF) 32 Page - ELAN Microelectronics Corp