HE84G762B datasheet(32/60 Pages) KB

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KING BILLION ELECTRONICS CO., LTD

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HE84G762B

HE80004 Series

June 1, 2004

V0.92

This specification is subject to change without notice. Please contact sales person for the latest version before use.

Field

Value

Function

Normal display.

BLANK

LCD display blanked. The COM signals of LCD driver output inactive levels

(LVL4 and LVL1) while SEG signals output normal display patterns.

LCD driver disabled, LCD driver has no output signal and applied to VDD

LCDE

LCD driver Enabled.

Please note that LCD driver must be turned off before the system goes into "sleep" mode. That means

user must clear the bit 0 of LCDC to turn off LCD driving circuit before setting bit6 of OP1 to enter sleep

mode. Large current might happen if the procedure is not followed.

Please note that LCD driver uses slow clock as clock source. The LCD display will not display normally

if it works in Fast clock only mode because the LCD refresh action is too fast.

12. Oscillators

The MCU is equipped with two clock sources with a variety of selections on the types of oscillators to

choose from. The system designer can select oscillator types based on the cost target, timing accuracy

requirements etc. Crystal, Resonator or the RC oscillator can be used as fast clock source, components

should be placed as close to the pins as possible. The type of oscillator used is selected by mask option

MO_FXTAL.

MO_FXTAL

Fast clock type

RC Oscillator.

Crystal Oscillator.

FXI

FXO

Crystal Osc.

RC Osc.

The RC oscillator has a built-in capacitor. An external resistor is needed to connect from FXI to GND to

determine the oscillation frequency. The capacitance of internal RC oscillator is selected by mask option

MO_RCAP[2..0].

MO_RCAP[2:0]

Internal RC Cap. (pF)

000

001

010

011

100

101

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