HT66F20 datasheet(232/298 Pages) HOLTEK

232 / 298 page

Rev. 1.90

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Rev. 1.90

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HT66F20/HT66F30/HT66F40/HT66F50/HT66F60

HT66FU30/HT66FU40/HT66FU50/HT66FU60

Enhanced A/D Flash Type 8-Bit MCU with EEPROM

HT66F20/HT66F30/HT66F40/HT66F50/HT66F60

HT66FU30/HT66FU40/HT66FU50/HT66FU60

Enhanced A/D Flash Type 8-Bit MCU with EEPROM

LCD Bias Control

TheLCDCOMdriverenablesarangeofselectionstobeprovidedtosuittherequirementofthe

LCDpanelwhichisbeingused.ThebiasresistorchoiceisimplementedusingtheISEL1andISEL0

bitsintheSCOMCregister.

SCOMC Register

• HT66F20

Bit

Name

ISEL1 ISEL0

SCOMEN

COM�EN

COM1EN

COM0EN

R/W

POR

Bit7

ReservedBit

0:Correctlevel-bitmustberesettozeroforcorrectoperation

1:Unpredictableoperation-bitmustnotbesethigh

Bit6~5

ISEL1, ISEL0:SelectSCOMtypicalbiascurrent(VDD=5V)

00:25μA

01:50μA

10:100μA

11:200μA

Bit4

SCOMEN:SCOMmoduleControl

0:Disable

1:Enable

Bit3

COM3EN:PC3orSCOM3selection

0:GPIO

1:SCOM3

Bit2

COM2EN:PC2orSCOM2selection

0:GPIO

1:SCOM2

Bit1

COM1EN:PC1orSCOM1selection

0:GPIO

1:SCOM1

Bit0

COM0EN:PC0orSCOM0selection

0:GPIO

1:SCOM0

HT66F20 Datasheet(PDF) 232 Page - Holtek Semiconductor Inc

HT66F20 Datasheet(HTML) 232 Page - Holtek Semiconductor Inc

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