Holtek HT66F20 Manual page 19

HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
A/D Flash MCU with EEPROM
Pin Name Function
AVDD ADC power s�pply*
VSS Gro�nd**
AVSS ADC gro�nd**
Note: I/T: Input type;
OP: Optional by configuration option (CO) or register option
PWR: Power;
CMOS: CMOS output;
SCOM: Software controlled LCD COM;
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
PA0~PA� Port A
PB0~PB� Port B
PC0~PC� Port C
PD0~PD� Port D
PE0~PE� Port E
PF0~PF� Port F
AN0~AN� ADC inp�t
VREF ADC reference inp�t
C0-� C�- Comparator 0� � inp�t
C0+� C�+ Comparator 0� � inp�t
C0X� C�X Comparator 0� � o�tp�t
TCK0~TCK3 TM0~TM3 inp�t
TP0_0� TP0_� TM0 I/O
TP�A TM� I/O
TP�B_0~TP�B_2 TM� I/O
TP2_0� TP2_� TM2 I/O
TP3_0� TP3_� TM3 I/O
INT0� INT� Ext. Interr�pt 0� �
PINT Peripheral Interr�pt
PCK Peripheral Clock o�tp�t
Rev. 2.50
OP I/T O/T
— PWR
— PWR
— PWR
O/T: Output type
CO: Configuration option; ST: Schmitt Trigger input
NMOS: NMOS output
AN: Analog signal
OP I/T O/T
PAWU
ST CMOS
PAPU
PBPU ST CMOS
PCPU ST CMOS
PDPU ST CMOS
PEPU ST CMOS
PFPU ST CMOS
ACERL AN
ADCR� AN
CP0C
AN
CP�C
CP0C
AN
CP�C
CP0C
CP�C — CMOS PA0� PA5 or PF0� PF�
PRM0
PRM� ST
TMPC0
ST CMOS PA0� PC5 or PC6� PD5
PRM2
TMPC0
ST CMOS PA� or PC�
PRM2
TMPC0
ST CMOS PC0� PC�� PC5 or –� – PE4
PRM2
TMPC�
ST CMOS PC3� PC4 or PD�� PD4
PRM2
TMPC�
ST CMOS PD3� PD0 or PE5� PE3
PRM2
PRM� ST
PRM0 ST
PRM0 — CMOS PC2 or PC5
�9
Pin-Shared Mapping
— —
— —
— —
Pin-Shared Mapping
—
—
—
—
—
—
— PA0~PA�
— PB5
— PA3� PC3
— PA2� PC2
PA2� PA4� PC2� PC4 or PD2� PD3�
—
PD0� –
— PA3� PA4 or PC4� PC5 or PE6� PE�
— PC3 or PC4
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