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Rev. 2.50
258
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Rev. 2.50
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HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
A/D Flash MCU with EEPROM
HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
A/D Flash MCU with EEPROM
• The PCK control bit is set to 1 to enable the PCK output as the clock source for the UART baud
rate generator with various PCK output frequencies determined by the PCKP1 and PCKP0 bits in
the SIMC0 Register.
♦
PCK output frequency selection bits PCKP1~PCKP0 in the SIMC0 Register
Bit
3
2
Name
PCKP�
PCKP0
val�e
����0�0��00
00: PCK output frequency is f
SYS
01: PCK output frequency is f
SYS
/4
10: PCK output frequency is f
SYS
/8
11: PCK output frequency is TM0 CCRP match frequency/2
♦
PCK output enable control bit PCKEN in the SIMC0 Register
Bit
4
Name
PCKEN
val�e
�
0: Disable PCK output
1: Enable PCK output
After the above setup conditions have been implemented, the MCU can enable the SIM interface
by setting the SIMEN bit high. The MCU can then begin communication with external UART
connected devices using its SPI interface. The detailed MCU Master SPI functional description is
provided within the Serial Interface Module section of the MCU datasheet.
Application Circuit with UART Module
Note: * It is recommended that this component is added for added ESD protection.
** It is recommended that this component is added in environments where power line noise is significant.