EM73P362 datasheet(17/44 Pages) EMC

17 / 44 page

This specification are subject to be changed without notice.

11.1.2001

EM73P362

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

TIMER FUNCTION

For timer mode, timerA increase one at any rising edge of internal pulse. User can choose 4 kinds of internal

pulse rate by setting IPSA for timerA.

When timerA counts overflow, TRGA will be generated to interrupt control unit.

PROGRAM EXAMPLE: To generate TRGA interrupt request after 60 ms with system clock XlN=32K Hz

LDIA

#0100B;

EXAE;

enable mask 2

EICIL 110111B; interrupt latch

←0, enable EI

LDIA

#04H;

STATAL;

LDIA

#0CH;

STATAM;

LDIA

#0FH;

STATAH;

LDIA

#1000B;

OUTA P28; enable timerA with internal pulse rate: XIN/25 Hz

NOTE:

The preset value of timer/counter register is calculated as following procedure.

Internal pulse rate: XIN/25 ; XIN = 32KHz

The time of timer counter count one = 25 /XIN = 32/32K=1ms

The number of internal pulse to get timer overflow = 60 ms/ 1ms = 60 = 03CH

The preset value of timer/counter register = 1000H - 03CH = 0FC4H

INTERRUPT FUNCTION

There are 3 internal interrupt sources and 2 external interrupt sources. Multiple interrupts are admitted

according the priority.

Type

Interrupt source

Priority

Interrupt

Program ROM

Latch

Enable condition

entry address

External

External interrupt (INT0)

IL5

EI=1

002H

Internal

Reserved

IL4

EI=1,MASK3=1

004H

Internal

TimerA overflow interrupt (TRGA)

IL3

EI=1,MASK2=1

006H

Internal

TimerB overflow interrupt (TRGB)

IL2

EI=1,MASK1=1

008H

Internal

Time base interrupt(TBI)

IL1

00AH

External

External interrupt (INT1)

IL0

EI=1,MASK0=1

00CH

Internal pulse

TimerA value

n+1

n+2

n+3

n+4

n+5

n+6

n+7

EM73P362 Datasheet(PDF) 17 Page - ELAN Microelectronics Corp

EM73P362 Datasheet(HTML) 17 Page - ELAN Microelectronics Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

Datasheet Download

Link URL