Configuration Options - Holtek HT66F20 Manual

HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
A/D Flash MCU with EEPROM

Configuration Options

Configuration options refer to certain options within the MCU that are programmed into the device
during the programming process. During the development process, these options are selected using
the HT-IDE software development tools. As these options are programmed into the device using
the hardware programming tools, once they are selected they cannot be changed later using the
application program. All options must be defined for proper system function, the details of which are
shown in the table.
No.
Oscillator Options
High Speed System Oscillator Selection – f
�
Low Speed System Oscillator Selection – f
2
WDT Clock Selection – f
3
HIRC Freq�ency Selection:
4
Note: The f and the f
SUB
Reset Pin Options
PB0/RES Pin Options:
5
Watchdog Options
Watchdog Timer F�nction:
6
CLR WDT Instr�ctions Selection:
�
LVR Options
LVR F�nction:
8
LVR Voltage Selection:
9
SIM Options
SIM F�nction:
�0
SPI – WCOL bit:
��
SPI – CSEN bit:
�2
Rev. 2.50
�. HXT
2. ERC
3. HIRC
�. LXT
2. LIRC
:
S
�. f
SUB
2. f /4
SYS
�. 4MHz
2. 8MHz
3. �2MHz
clock so�rce are LXT or LIRC selection by the f
TBC
�. RES pin
2. I/O pin
�. Enable
2. Disable
�. � instr�ctions
2. 2 instr�ctions
�. Enable
2. Disable
�. 2.�0V
2. 2.55V
3. 3.�5V
4. 4.20V
�. Enable
2. Disable
�. Enable
2. Disable
�. Enable
2. Disable
23�
Options
:
H
:
L
configuration option.
L
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