Holtek BS83B08-3 Manual page 3

Accumulator - ACC ..............................................................................................29
Program Counter Low Register - PCL..................................................................29
Look-up Table Registers - TBLP, TBHP, TBLH.....................................................29
Status Register - STATUS ...................................................................................30
EEPROM Data Memory .....................................................................31
EEPROM Data Memory Structure ........................................................................31
Reading Data from the EEPROM .........................................................................34
Writing Data to the EEPROM ...............................................................................34
Write Protection ....................................................................................................34
EEPROM Interrupt ...............................................................................................34
Programming Considerations ...............................................................................35
Programming Examples .......................................................................................35
Oscillator............................................................................................36
Oscillator Overview...............................................................................................36
System Clock Configurations................................................................................36
Internal High Speed RC Oscillator - HIRC............................................................36
Internal Low Speed RC Oscillator - LIRC .............................................................37
Operating Modes and System Clocks .............................................38
System Clocks......................................................................................................38
Control Register ...................................................................................................39
System Operation Modes .....................................................................................40
Operating Mode Switching....................................................................................41
NORMAL Mode to SLOW Mode Switching...........................................................42
SLOW Mode to NORMAL Mode Switching...........................................................42
Entering the SLEEP Mode....................................................................................42
Entering the IDLE0 Mode .....................................................................................43
Entering the IDLE1 Mode .....................................................................................43
Standby Current Considerations...........................................................................43
Wake-up...............................................................................................................44
Programming Considerations ...............................................................................44
Watchdog Timer ................................................................................45
Watchdog Timer Clock Source .............................................................................45
Watchdog Timer Control Register.........................................................................45
Watchdog Timer Operation...................................................................................45
Reset and Initialisation .....................................................................47
Reset Functions ...................................................................................................47
Reset Initial Conditions .........................................................................................50
Input/Output Ports.............................................................................60
I/O Register List....................................................................................................60
Pull-high Resistors................................................................................................62
Port A Wake-up ....................................................................................................63
Rev. 1.50 3
Contents
April 28, 2020