EM73P968 datasheet(21/53 Pages) EMC

21 / 53 page

* This specification are subject to be changed without notice.

EM73P968

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

8.14.2001

Preliminary

TIME BASE INTERRUPT (TBI)

The time base can be used to generate a single fixed frequency interrupt. Eight types of frequencies can be

selected with the "P25" setting.

P25 3

nitial value : 0000

P25

NORMAL operation mode

SLOW operation mode

0 0 x x

Interrupt disable

0 1 0 0

Interrupt frequency LXIN / 23 Hz

Reserved

0 1 0 1

Interrupt frequency LXIN / 215 Hz

0 1 1 0

Interrupt frequency LXIN / 25 Hz

Reserved

0 1 1 1

Interrupt frequency LXIN / 214 Hz

1 1 0 0

Interrupt frequency LXIN / 21 Hz

Reserved

1 1 0 1

Interrupt frequency LXIN / 26 Hz

1 1 1 0

Interrupt frequency LXIN / 28 Hz

1 1 1 1

Interrupt frequency LXIN / 210 Hz

1 0 x x

Reserved

TIMER / COUNTER (TIMERA, TIMERB)

Timer/counters support three special functions:

1. Even counter

2. Timer.

3. Pulse-width measurement.

These three functions can be executed by 2 timer/counter independently.

With timerA, the counter data is saved in timer register TAH, TAM, TAL. User can set counter initial

value and read the counter value by instruction "LDATAH(M,L)" and "STATAH(M,L)". With timer B

The basic structure of timer/counter is composed by two identical counter module, these two modules can

be set initial timer or counter value to the timer registers, P28 and P29 are the command registers for timerA

and timer B, user can choose different operation modes and internal clock rates by setting these two

registers. When timer/counter overflows, it will generate a TRGA(B) interrupt request to interrupt control

unit.

INTERRUPT CONTROL

TRGA request

P8.3/

TRGA

EVENT COUNTER CONTROL

TIMER CONTROL

internal clock

P28

12 BIT COUNTER

TMSA

IPSA

DATA BUS

P8.1/

TRGB

EVENT COUNTER CONTROL

TIMER CONTROL

internal clock

P29

12 BIT COUNTER

TMSB

IPSB

TRGB request

PULSE-WIDTH MEASUREMENT

CONTROL

PULSE-WIDTH MEASUREMENT

CONTROL

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