Holtek HT66F60A Manual page 3

HT66F60A/HT66F70A
A/D Flash MCU with EEPROM
EEPROM Data Memory .................................................................................. 46
EEPROM Data Memory Str�ct�re ........................................................................................ 46
EEPROM Re�isters .............................................................................................................. 46
Readin� Data from the EEPROM ......................................................................................... 4�
Writin� Data to the EEPROM ................................................................................................ 4�
Write Protection ..................................................................................................................... 4�
EEPROM Interr�pt ................................................................................................................ 4�
Pro�rammin� Considerations ................................................................................................ 4�
Pro�rammin� Examples ........................................................................................................ 49
Oscillator ........................................................................................................ 50
Oscillator Overview ............................................................................................................... 50
System Clock Configurations ................................................................................................ 50
External Crystal/Ceramic Oscillator - HXT ........................................................................... 51
External RC Oscillator - ERC ............................................................................................... 5�
Internal Hi�h Speed RC Oscillator - HIRC ........................................................................... 5�
External 3�.�6�kHz Crystal Oscillator - LXT ........................................................................ 53
Internal Low Speed Oscillator - LIRC ................................................................................... 54
S�pplementary Oscillators .................................................................................................... 54
Operating Modes and System Clocks ......................................................... 55
System Clock ........................................................................................................................ 55
System Operation Modes ...................................................................................................... 56
Control Re�ister .................................................................................................................... 5�
Fast Wake-�p ........................................................................................................................ 60
Operatin� Mode Switchin� .................................................................................................... 61
NORM�L Mode to SLOW Mode Switchin� ........................................................................... 6�
SLOW Mode to NORM�L Mode Switchin� ........................................................................... 63
Enterin� the SLEEP0 Mode .................................................................................................. 64
Enterin� the SLEEP1 Mode .................................................................................................. 64
Enterin� the IDLE0 Mode ...................................................................................................... 64
Enterin� the IDLE1 Mode ...................................................................................................... 65
Standby C�rrent Considerations ........................................................................................... 65
Wake-�p ................................................................................................................................ 66
Pro�rammin� Considerations ................................................................................................ 66
Watchdog Timer ............................................................................................. 67
Watchdo� Timer Clock So�rce .............................................................................................. 6�
Watchdo� Timer Control Re�ister ......................................................................................... 6�
Watchdo� Timer Operation ................................................................................................... 6�
Reset and Initialisation .................................................................................. 70
Reset F�nctions .................................................................................................................... �0
Reset Initial Conditions ......................................................................................................... �4
Input/Output Ports ......................................................................................... 78
P�ll-hi�h Resistors ................................................................................................................ �0
Port � Wake-�p ..................................................................................................................... �0
I/O Port Control Re�isters ..................................................................................................... �0
Pin-shared F�nctions ............................................................................................................ �0
Rev. 1.40 3 ����st ��� �01�