Holtek HT66F20 Manual page 17

HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
A/D Flash MCU with EEPROM
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.
HT66F30
Pin Name Function
PA0~PA� Port A
PB0~PB5 Port B
PC0~PC� Port C
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� TCK� TM0� TM� inp�t
TP0_0� TP0_� TM0 I/O
TP�A TM� I/O
TP�B_0� TP�B_� TM� I/O
INT0� INT� Ext. Interr�pt 0� �
PINT Peripheral Interr�pt
PCK Peripheral Clock o�tp�t
SDI SPI Data inp�t
SDO SPI Data o�tp�t
SCS SPI Slave Select
SCK SPI Serial Clock
SCL I C Clock
2
SDA I C Data
2
SCOM0~SCOM3 SCOM0~SCOM3
OSC� HXT/ERC pin
OSC2 HXT pin
XT� LXT pin
XT2 LXT pin
RES Reset inp�t
VDD Power s�pply*
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
Rev. 2.50
OP I/T
PAWU
ST CMOS
PAPU
PBPU ST CMOS
PCPU ST CMOS
ACERL AN
ADCR� AN
AN
CP0C
AN
CP�C
— CMOS
— ST
TMPC0 ST CMOS
TMPC0 ST CMOS
TMPC0 ST CMOS
— ST
PRM0 ST
PRM0 — CMOS
PRM0 ST
PRM0 — CMOS
PRM0 ST CMOS
PRM0 ST CMOS
PRM0 ST NMOS
PRM0 ST NMOS
SCOMC — SCOM
CO HXT
CO —
CO LXT
CO —
CO ST
— PWR
— PWR
— PWR
— PWR
O/T: Output type
CO: Configuration option; ST: Schmitt Trigger input
NMOS: NMOS output
AN: Analog signal
��
O/T Pin-Shared Mapping
—
—
—
— PA0~PA�
— PB5
— PA3� PC3
— PA2� PC2
PA0� PA5
— PA2� PA4
PA0� PC5
PA�
PC0� PC�
— PA3� PA4
— PC3 or PC4
PC2 or PC5
— PA6 or PC0
PA5 or PC�
PB5 or PC6
PA� or PC�
PA� or PC�
PA6 or PC0
PC0� PC�� PC6� PC�
— PB�
HXT PB2
— PB3
LXT PB4
— PB0
— —
— —
— —
— —
��ne 22� 20��