Holtek BS83B24C Manual page 3

BS83B24C/BS83C40C
Touch Flash MCU
Special Function Register Description ........................................................ 35
Indi�ect Add�essing Registe�s - IAR0� IAR1� IAR� ............................................................... 35
Memo�� Pointe�s - MP0� MP1L� MP1H� MP�L� MP�H ......................................................... 35
Acc�m�lato� - ACC .............................................................................................................. 36
P�og�am Co�nte� Low Registe� - PCL ................................................................................. 3�
Look-�p Ta�le Registe�s - TBLP� TBHP� TBLH .................................................................... 3�
Stat�s Registe� - STATUS .................................................................................................... 3�
EEPROM Data Memory .................................................................................. 39
EEPROM Data Memo�� St��ct��e ........................................................................................ 39
EEPROM Registe�s .............................................................................................................. 39
Reading Data f�om the EEPROM ......................................................................................... 40
W�iting Data to the EEPROM ................................................................................................ 41
W�ite P�otection ..................................................................................................................... 41
EEPROM Inte���pt ................................................................................................................ 41
P�og�amming Conside�ations ................................................................................................ 41
Oscillators ...................................................................................................... 43
Oscillato� Ove�view ............................................................................................................... 43
System Clock Configurations ................................................................................................ 43
Inte�nal RC Oscillato� - HIRC ............................................................................................... 44
Exte�nal 3�.�6�kHz C��stal Oscillato� - LXT ........................................................................ 44
Inte�nal 3�kHz Oscillato� - LIRC ........................................................................................... 45
Operating Modes and System Clocks ......................................................... 46
S�stem Clocks ...................................................................................................................... 46
S�stem Ope�ation Modes ...................................................................................................... 4�
Cont�ol Registe�s .................................................................................................................. 4�
Ope�ating Mode Switching .................................................................................................... 50
Stand�� C���ent Conside�ations ........................................................................................... 54
Wake-�p ................................................................................................................................ 54
Watchdog Timer ............................................................................................. 55
Watchdog Time� Clock So��ce .............................................................................................. 55
Watchdog Time� Cont�ol Registe� ......................................................................................... 55
Watchdog Time� Ope�ation ................................................................................................... 56
Reset and Initialisation ................................................................................. 57
Reset ��nctions .................................................................................................................... 5�
Reset Initial Conditions ........................................................................................................ 60
Input/Output Ports ........................................................................................ 65
P�ll-high Resisto�s ................................................................................................................ 66
Po�t A Wake-�p ..................................................................................................................... 66
I/O Po�t Cont�ol Registe�s ..................................................................................................... 6�
I/O Po�t So��ce C���ent Cont�ol ............................................................................................ 6�
Pin-sha�ed ��nctions ............................................................................................................ 69
I/O Pin St��ct��es .................................................................................................................. �5
P�og�amming Conside�ations ............................................................................................... �5
Rev. 1.00 3 �e���a�� 0�� �01�