Holtek BS83A04C Manual page 3

BS83A04C
4-Key Enhanced Touch I/O Flash MCU
Memory Pointers - MP0, MP1 ....................................................................................................22
Bank Pointer - BP .......................................................................................................................23
Accumulator - ACC .....................................................................................................................23
Program Counter Low Register - PCL ........................................................................................23
Look-up Table Registers - TBLP, TBHP, TBLH ...........................................................................23
Status Register - STATUS ..........................................................................................................24
Emulated EEPROM Data Memory ..................................................................... 25
Emulated EEPROM Data Memory Structure ..............................................................................25
Emulated EEPROM Registers ....................................................................................................26
Erasing the Emulated EEPROM .................................................................................................29
Writing Data to the Emulated EEPROM ......................................................................................29
Reading Data from the Emulated EEPROM ...............................................................................29
Programming Considerations ......................................................................................................30
Oscillators ........................................................................................................... 31
Oscillator Overview .....................................................................................................................31
System Clock Configurations ......................................................................................................31
Internal High Speed RC Oscillator - HIRC .................................................................................32
Internal 32kHz Oscillator - LIRC .................................................................................................32
Operating Modes and System Clocks .............................................................. 32
System Clocks ............................................................................................................................32
System Operation Modes ............................................................................................................33
Control Registers ........................................................................................................................34
Operating Mode Switching ..........................................................................................................36
Standby Current Considerations .................................................................................................39
Wake-up ......................................................................................................................................39
Watchdog Timer .................................................................................................. 40
Watchdog Timer Clock Source ....................................................................................................40
Watchdog Timer Control Register ...............................................................................................40
Watchdog Timer Operation .........................................................................................................41
Reset and Initialisation ....................................................................................... 42
Reset Functions ..........................................................................................................................42
Reset Initial Conditions ...............................................................................................................44
Input/Output Ports .............................................................................................. 47
Pull-high Resistors ......................................................................................................................47
Port A Wake-up ...........................................................................................................................48
I/O Port Control Registers ...........................................................................................................48
Pin-shared Functions ..................................................................................................................49
I/O Pin Structures ........................................................................................................................51
Programming Considerations ......................................................................................................51
Timer Module - TM ............................................................................................. 52
Introduction .................................................................................................................................52
TM Operation ..............................................................................................................................52
TM Clock Source .........................................................................................................................52
TM Interrupts ...............................................................................................................................52
Rev. 1.00 3 March 24, 2020