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Rev. 2.50
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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
Pin Name
Function
OP
I/T
O/T
Pin-Shared Mapping
AVDD
ADC power s�pply*
—
PWR
—
—
VSS
Gro�nd**
—
PWR
—
—
AVSS
ADC gro�nd**
—
PWR
—
—
Note: I/T: Input type;
O/T: Output type
OP: Optional by configuration option (CO) or register option
PWR: Power;
CO: Configuration option; ST: Schmitt Trigger input
CMOS: CMOS output;
NMOS: NMOS output
SCOM: Software controlled LCD COM;
AN: Analog signal
HXT: High frequency crystal oscillator
LXT: Low frequency crystal oscillator
*: VDD is the device power supply while AVDD is the ADC power supply. The AVDD pin is bonded
together internally with VDD.
**: VSS is the device ground pin while AVSS is the ADC ground pin. The AVSS pin is bonded together
internally with VSS.
As the Pin Description Summary table applies to the package type with the most pins, not all of the above
listed pins may be present on package types with smaller numbers of pins.
HT66F50
Pin Name
Function
OP
I/T
O/T
Pin-Shared Mapping
PA0~PA�
Port A
PAWU
PAPU
ST
CMOS
—
PB0~PB�
Port B
PBPU
ST
CMOS
—
PC0~PC�
Port C
PCPU
ST
CMOS
—
PD0~PD�
Port D
PDPU
ST
CMOS
—
PE0~PE�
Port E
PEPU
ST
CMOS
—
PF0~PF�
Port F
PFPU
ST
CMOS
—
AN0~AN�
ADC inp�t
ACERL
AN
—
PA0~PA�
VREF
ADC reference inp�t
ADCR�
AN
—
PB5
C0-� C�-
Comparator 0� � inp�t
CP0C
CP�C
AN
—
PA3� PC3
C0+� C�+
Comparator 0� � inp�t
CP0C
CP�C
AN
—
PA2� PC2
C0X� C�X
Comparator 0� � o�tp�t
CP0C
CP�C
PRM0
—
CMOS PA0� PA5 or PF0� PF�
TCK0~TCK3
TM0~TM3 inp�t
PRM�
ST
—
PA2� PA4� PC2� PC4 or PD2� PD3�
PD0� –
TP0_0� TP0_�
TM0 I/O
TMPC0
PRM2
ST
CMOS PA0� PC5 or PC6� PD5
TP�A
TM� I/O
TMPC0
PRM2
ST
CMOS PA� or PC�
TP�B_0~TP�B_2 TM� I/O
TMPC0
PRM2
ST
CMOS PC0� PC�� PC5 or –� – PE4
TP2_0� TP2_�
TM2 I/O
TMPC�
PRM2
ST
CMOS PC3� PC4 or PD�� PD4
TP3_0� TP3_�
TM3 I/O
TMPC�
PRM2
ST
CMOS PD3� PD0 or PE5� PE3
INT0� INT�
Ext. Interr�pt 0� �
PRM�
ST
—
PA3� PA4 or PC4� PC5 or PE6� PE�
PINT
Peripheral Interr�pt
PRM0
ST
—
PC3 or PC4
PCK
Peripheral Clock o�tp�t
PRM0
—
CMOS PC2 or PC5