12

* This specification are subject to be changed without notice.

10.8.2001

EM73361A

EM73361A

EM73361A

EM73361A

EM73361A

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

CLOCK AND TIMING GENERATOR FUNCTION

CLOCK AND TIMING GENERATOR FUNCTION

CLOCK AND TIMING GENERATOR FUNCTION

CLOCK AND TIMING GENERATOR FUNCTION

CLOCK AND TIMING GENERATOR FUNCTION

The frequency of fc is the oscillation frequency for XIN, XOUT by crystal ( resonator) or by RC osc.

When CPU sleeps, the XOUT pin will be in "high" state .

The instruction cycle equal 4 basic clock fc.

1 instructure cycle = 4 / fc

TIMING GENERATOR AND TIME BASE

TIMING GENERATOR AND TIME BASE

TIMING GENERATOR AND TIME BASE

TIMING GENERATOR AND TIME BASE

TIMING GENERATOR AND TIME BASE

The timing generator produces the system clock from basic clock pulse which can be normal mode or slow

mode clock.

1 instruction cycle = 4 basic clock pulses

There are 22 stages time base .

When working in the single clock mode, the timebase clock source is come from fc.

Time base provides basic frequency for following function:

1. TBI (time base interrupt) .

2. Timer/counter, internal clock source.

3. Warm-up time for sleep - mode releasing.

TIME BASE INTERRUPT (TBI )

TIME BASE INTERRUPT (TBI )

TIME BASE INTERRUPT (TBI )

TIME BASE INTERRUPT (TBI )

TIME BASE INTERRUPT (TBI )

The time base can be used to generate a fixed frequency interrupt . There are 8 kinds of frequencies can be

selected by setting "P25"

Single clock mode

P25

3

2

1

0

( initial value 0000 )

0 0 x x: Interrupt disable

1 0 x x: Reserved

fc

Prescaler

Binary counter

12

3

0

5

6 7

8

9 10 11 12 13

421

20

19

18

17

16

15

14

XIN

XOUT

Crystal connection

XIN

XOUT

Resistor connection