HT66F20 View Datasheet(PDF) - Holtek Semiconductor

Part Name

Description

View to exact match

HT66F20

Enhanced A/D Flash Type MCU 8-Bit MCU with EEPROM

Holtek Semiconductor 

HT66F20/HT66F30/HT66F40/HT66F50/HT66F60

HT66FU30/HT66FU40/HT66FU50/HT66FU60

Pin Name

TP1A

Function

TM1 I/O

TP1B_0~TP1B_2 TM1 I/O

TP2_0, TP2_1

TM2 I/O

TP3_0, TP3_1

TM3 I/O

OP

I/T

TMPC0

PRM2

ST

TMPC0

PRM2

ST

TMPC1

PRM2

ST

TMPC1

PRM2

ST

INT0~INT3

Ext. Interrupt 0~3

PRM1

ST

PINT

PCK

SDI

SDO

SCS

SCK

Peripheral Interrupt

Peripheral Clock output

SPI Data input

SPI Data output

SPI Slave Select

SPI Serial Clock

SCL

SDA

SCOM0~SCOM3

OSC1

OSC2

XT1

XT2

RES

VDD

AVDD

VSS

AVSS

I2C Clock

I2C Data

SCOM0~SCOM3

HXT/ERC pin

HXT pin

LXT pin

LXT pin

Reset input

Power supply *

ADC power supply *

Ground **

ADC ground **

PRM0

PRM0

PRM0

PRM0

PRM0

PRM0

PRM0

PRM0

SCOMC

CO

CO

CO

CO

CO

¾

¾

¾

¾

ST

¾

ST

¾

ST

ST

ST

ST

¾

HXT

¾

LXT

¾

ST

PWR

PWR

PWR

PWR

O/T

Pin-Shared Mapping

CMOS PA1 or PC7

PC0, PC1, PC5 or

CMOS -, -, PE4

CMOS PC3, PC4 or PD1, PD4

CMOS PD3, PD0 or PE5, PE3

¾

¾

CMOS

¾

CMOS

CMOS

CMOS

NMOS

NMOS

SCOM

¾

HXT

¾

LXT

¾

¾

¾

¾

¾

PA3, PA4, PC4, PC5 or

PC4, PC5, PE2, -, or

PE0, PE1, -, - or

PE6, PE7, -, -

PC3 or PC4

PC2 or PC5

PA6 or PD2 or PB7

PA5 or PD3 or PB6 or

PD1

PB5 or PD0 or PD7

PA7 or PD1 or PD6 or

PD3

PA7 or PD1 or PD6 or

PD3

PA6 or PD2 or PB7

PC0, PC1, PC6, PC7

PB1

PB2

PB3

PB4

PB0

¾

¾

¾

¾

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 input pin

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.

Rev. 1.10

13

February 1, 2010

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