To Next Page

To Previous Page

Rev. 2.50 228 June 22, 2017 Rev. 2.50 229 June 22, 2017

HT66F20/HT66F30/HT66F40/HT66F50/HT66F60

HT66FU30/HT66FU40/HT66FU50/HT66FU60

A/D Flash MCU with EEPROM

HT66F20/HT66F30/HT66F40/HT66F50/HT66F60

HT66FU30/HT66FU40/HT66FU50/HT66FU60

A/D Flash MCU with EEPROM

SCOM Function for LCD

ThedeviceshavethecapabilityofdrivingexternalLCDpanels.ThecommonpinsforLCDdriving,

SCOM0~SCOM3,arepinsharedwithcertainpinonthePC0~PC3orPC0~PC1,PC6~PC7port.

TheLCDsignals(COMandSEG)aregeneratedusingtheapplicationprogram.

LCD Operation

AnexternalLCDpanelcanbedrivenusingthisdevicebyconguringthePC0~PC3orPC0~PC1,

PC6~PC7pinsascommonpinsandusingotheroutputportslinesassegmentpins.TheLCDdriver

functioniscontrolledusingtheSCOMCregisterwhichinadditiontocontrollingtheoverallon/off

functionalsocontrolsthebiasvoltagesetupfunction.ThisenablestheLCDCOMdrivertogenerate

thenecessaryV

/2voltagelevelsforLCD1/2biasoperation.

TheSCOMENbitintheSCOMCregisteristheoverallmastercontrolfortheLCDdriver,however

thisbitisusedinconjunctionwiththeCOMnENbitstoselectwhichPortCpinsareusedforLCD

driving.NotethatthePortControlregisterdoesnotneedtorstsetupthepinsasoutputstoenable

theLCDdriveroperation.



















    

LCD COM Bias

SCOMEN COMnEN Pin Function O/P Level

0 X I/O

0 or 1

1 0 I/O 0 or 1

1 1 SCOMn V

Output Control

Holtek HT66F30 User Manual

Other manuals for Holtek HT66F30