BS87B12A-3 Datasheet, PDF (5/224 Pages) Holtek Semiconductor Inc – Touch A/D Flash MCU with OCVP

BS87B12A-3/BS87C16A-3/BS87D20A-3
Touch A/D Flash MCU with OCVP
UART Interface.............................................................................................. 149
UART External Pins............................................................................................................. 149
UART Data Transfer Scheme.............................................................................................. 150
UART Status and Control Registers.................................................................................... 150
Baud Rate Generator........................................................................................................... 155
UART Setup and Control..................................................................................................... 156
UART Transmitter................................................................................................................ 157
UART Receiver.................................................................................................................... 159
Managing Receiver Errors................................................................................................... 160
UART Interrupt Structure..................................................................................................... 161
UART Power Down and Wake-up........................................................................................ 163
Over Current/Voltage Protection Function – OCVP................................... 164
OCVP Operation.................................................................................................................. 164
OCVP Control Registers...................................................................................................... 165
Input Voltage Range............................................................................................................. 169
Input Offset Cancellation...................................................................................................... 170
OCVP Interrupt..................................................................................................................... 171
Programming Considerations............................................................................................... 171
Software Controlled LCD Driver.................................................................. 172
LCD Operation..................................................................................................................... 172
LCD Control Registers......................................................................................................... 174
Low Voltage Detector – LVD........................................................................ 177
LVD Register........................................................................................................................ 177
LVD Operation...................................................................................................................... 178
Interrupts....................................................................................................... 179
Interrupt Registers................................................................................................................ 179
Interrupt Operation............................................................................................................... 185
External Interrupt.................................................................................................................. 189
Touch Key Module Interrupt................................................................................................. 189
OCVP Interrupt..................................................................................................................... 189
TM Interrupts........................................................................................................................ 189
Multi-function Interrupt – BS87C16A-3 & BS87D20A-3....................................................... 190
Serial Interface Module Interrupt.......................................................................................... 190
EEPROM Interrupt............................................................................................................... 191
UART Transfer Interrupt....................................................................................................... 191
LVD Interrupt........................................................................................................................ 191
A/D Converter Interrupt........................................................................................................ 191
Time Base Interrupts............................................................................................................ 192
Interrupt Wake-up Function.................................................................................................. 193
Programming Considerations............................................................................................... 194
Configuration Options.................................................................................. 195
Application Circuits...................................................................................... 196
Rev. 1.20
5
December 05, 2016