Holtek HT66F0175 - Page 16

Rev. 1.50 16 August 28, 2017 Rev. 1.50 17 August 28, 2017
HT66F0175/HT66F0185
A/D Flash MCU with EEPROM
HT66F0175/HT66F0185
A/D Flash MCU with EEPROM
Pad Name Function OPT I/T O/T Description
PC3/SDO/SSEG21
PC3 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SDO
SIMC0
IFS
— CMOS SPI data output
SSEG21 SLCDC3 — SSEG Software controlled LCD segment output
PC4/SDI/SDA//
SSEG22
PC4 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SDI
SIMC0
IFS
ST — SPI data input
SDA
SIMC0
IFS
ST NMOS I
2
C data line
SSEG22 SLCDC4 — SSEG Software controlled LCD segment output
PC5/SCK/SCL/
SSEG1/SCOM1
PC5 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SCK
SIMC0
IFS
ST CMOS SPI serial clock
SCL
SIMC0
IFS
ST NMOS I
2
C clock line
SSEG1
SLCDC0
SLCDC1
— SSEG Software controlled LCD segment output
SCOM1
SLCDC0
SLCDC1
— SCOM Software controlled LCD common output
PC6/SCS/SSEG23
PC6 PCPU ST CMOS General purpose I/O. Register enabled pull-up.
SCS
SLCDC0
SIMC0 IFS
ST CMOS SPI slave select
SSEG23 SLCDC4 — SSEG Software controlled LCD segment output
PD0/SSEG11
PD0 PDPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG11 SLCDC2 — SSEG Software controlled LCD segment output
PD1/RX/SSEG12
PD1 PDPU ST CMOS General purpose I/O. Register enabled pull-up.
RX
UCR1
UCR2
ST — UART RX serial data input
SSEG12 SLCDC2 — SSEG Software controlled LCD segment output
PD2/TX/SSEG13
PD2 PDPU ST CMOS General purpose I/O. Register enabled pull-up.
TX
UCR1
UCR2
— CMOS UART TX serial data output
SSEG13 SLCDC2 — SSEG Software controlled LCD segment output
PD3/SSEG14
PD3 PDPU ST CMOS General purpose I/O. Register enabled pull-up.
SSEG14 SLCDC3 — SSEG Software controlled LCD segment output
VDD&AVDD
VDD — PWR — Positive power supply
AVDD — PWR — A/D converter positive power supply
VSS&AVSS
VSS — PWR — Negative power supply, ground.
AVSS — PWR — A/D converter negative power supply, ground.
Note:I/T:Inputtype;  O/T:Outputtype;
OPT:Optionalbycongurationoption(CO)orregisteroption;
CO:Congurationoption; ST:SchmittTriggerinput; AN:Analoginput;
CMOS:CMOSoutput; NMOS:NMOSoutput; AO:Analogoutput;
SSEG:SoftwarecontrolledLCDSEG;   SCOM:SoftwarecontrolledLCDCOM;
HXT:Highfrequencycrystaloscillator;   LXT:Lowfrequencycrystaloscillator
PWR:Power
*TheAVDDpinisinternallybondedtogetherwiththeVDDpinwhiletheAVSSpinisinternallybonded
togetherwiththeVSSpin.
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.