Holtek HT66F488 Manual page 12

Pin Name Function
PD�
ICPDA
PD�/ICPDA/
SLCDC�
SCOM�
SCOM�/SSEG�
SLCDC1
SLCDC�
SSEG�
SLCDC1
PD1
SLCDC�
PD1/SCOM1/ SCOM1
SLCDC1
SSEG1
SLCDC�
SSEG1
SLCDC1
PD2
SLCDC�
PD2/SCOM2/ SCOM2
SLCDC1
SSEG2
SLCDC�
SSEG2
SLCDC1
PD3
SLCDC�
PD3/SCOM3/ SCOM3
SLCDC1
SSEG3
SLCDC�
SSEG3
SLCDC1
PD4
PD4/SCOM4/
SCOM4 SLCDC1
SSEG4
SSEG4 SLCDC1
PD5
PD5/SCOM5/
SCOM5 SLCDC1
SSEG5
SSEG5 SLCDC1
VDD
VDD/AVDD
AVDD
VSS
VSS/AVSS
AVSS
Note: I/T: Input type;
OP: Optional by configuration option (CO) or register option
PWR: Power;
CMOS: CMOS output;
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.
Note: 1. This Pin Description Summary table describes all resources which may not be connected to external pins.
2. For 28-SKDIP/SOP package PB0, PC1, PC2 and PC7 are not bonded to external pins and should be
properly configured to avoid a floating condition which will result in additional current leakage.
Rev. 1.21
OPT I/T O/T
PDPU ST CMOS Gene�al pu�pose I/O. Registe� ena�le pull-up.
— ST CMOS ICP Data/Add�ess pin
— CMOS Softwa�e LCD COM output
— CMOS Softwa�e LCD SEG output
PDPU ST CMOS Gene�al pu�pose I/O. Registe� ena�le pull-up.
— CMOS Softwa�e LCD COM output
— CMOS Softwa�e LCD SEG output
PDPU ST CMOS Gene�al pu�pose I/O. Registe� ena�le pull-up.
— CMOS Softwa�e LCD COM output
— CMOS Softwa�e LCD SEG output
PDPU ST CMOS Gene�al pu�pose I/O. Registe� ena�le pull-up.
— CMOS Softwa�e LCD COM output
— CMOS Softwa�e LCD SEG output
PDPU ST CMOS Gene�al pu�pose I/O. Registe� ena�le pull-up.
— CMOS Softwa�e LCD COM output
— CMOS Softwa�e LCD SEG output
PDPU ST CMOS Gene�al pu�pose I/O. Registe� ena�le pull-up.
— CMOS Softwa�e LCD COM output
— CMOS Softwa�e LCD SEG output
— PWR — Positive Powe� Supply
— PWR — Analog Positive Powe� Supply
— PWR — �egative Powe� Supply. G�ound
— PWR — Analog �egative Powe� Supply
O/T: Output type
CO: Configuration option;
AN: Analog input pin
12
HT66F488/HT66F489
A/D Flash MCU with EEPROM
Description
ST: Schmitt Trigger input
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