Holtek HT66F20-1 Manual page 14

HT68F20-1
Pin Name Function
PA0~PA7 Po�t A
PB0~PB5 Po�t B
PC0~PC� Po�t C
C0-� C1- Co�pa�ato� 0� 1 input
C0+� C1+ Co�pa�ato� 0� 1 input
C0X� C1X Co�pa�ato� 0� 1 output
TCK0� TCK1 TM0� TM1 input
TP0_0 TM0 I/O
TP1_0� TP1_1 TM1 I/O
I�T0� I�T1 Ext. Inte��upt 0� 1
PI�T Pe�iphe�al Inte��upt
PCK Pe�iphe�al Clock output
SDI SPI Data input
SDO SPI Data output
SCS SPI Slave Select
SCK SPI Se�ial Clock
SCL I C Clock
�
SDA I C Data
�
SCOM0~SCOM� SCOM0~SCOM�
OSC1 HXT/ERC pin
OSC� HXT pin
XT1 LXT pin
XT� LXT pin
RES Reset input
VDD Powe� supply
VSS G�ound
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
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. 1.40
HT66F20-1/HT66F30-1/HT68F20-1/HT68F30-1
Flash MCU with EEPROM
OP I/T
PAWU
ST
PAPU
PBPU ST
PCPU ST
A�
CP0C
A�
CP1C
—
— ST
TMPC0 ST
TMPC0 ST
— ST
— ST
— —
— ST
— —
— ST
— ST
— ST
— ST
SCOMC —
CO HXT
CO —
CO LXT
CO —
CO ST
— PWR
— PWR
14
O/T Pin-Shared Mapping
CMOS —
CMOS —
CMOS —
— PA�� PC�
— PA�� PC�
CMOS PA0� PA5
— PA�� PA4
CMOS PA0
CMOS PA1� PC0
— PA�� PA4
— PC�
CMOS PC�
— PA�
CMOS PA5
CMOS PB5
CMOS PA7
�MOS PA7
�MOS PA�
SCOM PC0� PC1� PC�� PC�
— PB1
HXT PB�
— PB�
LXT PB4
— PB0
— —
— —
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