EM73201AP Ver la hoja de datos (PDF) - ELAN Microelectronics

Número de pieza

componentes Descripción

Fabricante

EM73201AP

4-BIT MICRO-CONTROLLER FOR GENERAL PURPOSE PRODUCT

ELAN Microelectronics 

EM73201

4-BIT MICRO-CONTROLLER FOR GENERAL PURPOSE PRODUCT

Preliminary

TIMER / COUNTER ( TIMERA)

Timer/counters can support user three special functions:

1. Even counter

2. Timer.

3. Pulse-width measurement.

These three functions can be executed by timer/counter.

For timerA, the counter data is saved in timer register TAH, TAM, TAL, which user can set counter

initial value and read the counter value by W/B instruction "LDATAH (B,L), STATAH (B,L)".

The counter can be set initial value and send counter value to timer register. P28 is the command port

for timerA , user can choose different operation mode and different internal clock rate by setting the

port. When timer/counter overflow, it will generate a TRGA interrupt request to interrupt control unit.

INTERRUPT CONTROL

TRGA request

DATA BUS

12 BIT COUNTER

P8.3/

TRGA

EVENT COUNTER CONTROL

TIMER CONTROL

internal clock

PULSE-WIDTH MEASUREMENT

CONTROL

P28 TMSA

IPSA

TIMER/COUNTER CONTROL

P8.3/TRGA is the external timer inputs for timerA, it used in event counter and pulse-width

measurement mode.

Timer/counter command port: P28 is the command port for timer/counterA.

Port 28 3 2 1 0 TIMER/COUNTER MODE SELECTION

TMSA IPSA TMSA Function description

Initial state: 0000 0 0 Stop

0 1 Event counter mode

1 0 Timer mode

1 1 Pulse width measurement mode

* This specification are subject to be changed without notice.

7.20.1999 13

Share Link: