Rev. 1.00
204
September 11, 2018
Rev. 1.00
205
September 11, 2018
HT45F4050
A/D NFC Flash MCU
HT45F4050
A/D NFC Flash MCU
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.
Options
Oscillator Options
1
HIRC frequency selection (for writer trim & EV trim code use only)
1. 4MHz
2. 8MHz
3. 12MHz
2
HXT mode selection (for Low Voltage mode):
1.By S/W
2.HXT > 10MHz or HXT ≤ [email protected]
Note: When the HIRC has been configured at a frequency shown in this table, it is recommended to
configure the HIRC1 and HIRC0 bits in the HIRCC register to select the same frequency to
ensure a higher HIRC frequency accuracy specified in the A.C. characteristics.