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BS87D20A-3 Datasheet(PDF) 5 Page - Holtek Semiconductor Inc

Part # BS87D20A-3
Description  Touch A/D Flash MCU with OCVP
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

BS87D20A-3 Datasheet(HTML) 5 Page - Holtek Semiconductor Inc

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Rev. 1.20
4
De�e��e� 0�� 201�
Rev. 1.20
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De�e��e� 0�� 201�
BS87B12A-3/BS87C16A-3/BS87D20A-3
Touch A/D Flash MCU with OCVP
BS87B12A-3/BS87C16A-3/BS87D20A-3
Touch A/D Flash MCU with OCVP
UART Interface............................................................................................. 149
UART Exte�nal Pins ............................................................................................................ 149
UART Data T�ansfe� S�he�e.............................................................................................. 1�0
UART Status and Cont�ol Registe�s.................................................................................... 1�0
Baud Rate Gene�ato�.......................................................................................................... 1��
UART Setup and Cont�ol..................................................................................................... 1��
UART T�ans�itte�................................................................................................................ 1�7
UART Re�eive� ................................................................................................................... 1�9
Managing Re�eive� E��o�s .................................................................................................. 1�0
UART Inte��upt St�u�tu�e..................................................................................................... 1�1
UART Powe� Down and Wake-up....................................................................................... 1�3
Over Current/Voltage Protection Function – OCVP.................................. 164
OCVP Ope�ation ................................................................................................................. 1�4
OCVP Cont�ol Registe�s ..................................................................................................... 1��
Input Voltage Range............................................................................................................ 1�9
Input Offset Can�ellation..................................................................................................... 170
OCVP Inte��upt.................................................................................................................... 171
P�og�a��ing Conside�ations.............................................................................................. 171
Software Controlled LCD Driver................................................................. 172
LCD Ope�ation .................................................................................................................... 172
LCD Cont�ol Registe�s ........................................................................................................ 174
Low Voltage Detector – LVD ....................................................................... 177
LVD Registe� ....................................................................................................................... 177
LVD Ope�ation..................................................................................................................... 178
Interrupts...................................................................................................... 179
Inte��upt Registe�s............................................................................................................... 179
Inte��upt Ope�ation.............................................................................................................. 18�
Exte�nal Inte��upt................................................................................................................. 189
Tou�h Key Module Inte��upt ................................................................................................ 189
OCVP Inte��upt.................................................................................................................... 189
TM Inte��upts....................................................................................................................... 189
Multi-fun�tion Inte��upt – BS87C1�A-3 & BS87D20A-3...................................................... 190
Se�ial Inte�fa�e Module Inte��upt......................................................................................... 190
EEPROM Inte��upt .............................................................................................................. 191
UART T�ansfe� Inte��upt...................................................................................................... 191
LVD Inte��upt ....................................................................................................................... 191
A/D Conve�te� Inte��upt....................................................................................................... 191
Ti�e Base Inte��upts........................................................................................................... 192
Inte��upt Wake-up Fun�tion................................................................................................. 193
P�og�a��ing Conside�ations.............................................................................................. 194
Configuration Options................................................................................. 195
Application Circuits..................................................................................... 196


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