HT45F23A
8-Bit Flash MCU with Op Amps & Comparators
Pin Name
Function
OPT
I/T
O/T
Description
PAPU
PAWU
PA5
ST CMOS Generaꢁ pꢀrpose I/O. Register enabꢁed pꢀꢁꢁ-ꢀp and wake-ꢀp.
PA5/AꢅP/PFD
AꢅP
PFD
OPAꢅC1 OPAI
—
OPAꢅ non-inverting inpꢀt pin
MISC
—
CMOS PFD oꢀtpꢀt
PAPU
PAWU
PA6
ST CMOS Generaꢁ pꢀrpose I/O. Register enabꢁed pꢀꢁꢁ-ꢀp and wake-ꢀp.
PA6/AꢅN/BZ
PA7/AꢅE/BZ
AꢅN
BZ
OPAꢅC1 OPAI
—
OPAꢅ inverting inpꢀt pin
BPCTL
—
CMOS Bꢀzzer oꢀtpꢀt
PAPU
PAWU
PA7
ST CMOS Generaꢁ pꢀrpose I/O. Register enabꢁed pꢀꢁꢁ-ꢀp and wake-ꢀp.
AꢅE
BZ
OPAꢅC1
BPCTL
—
—
OPAO OPAꢅ oꢀtpꢀt pin
CMOS Compꢁementarꢂ bꢀzzer oꢀtpꢀt
PBPU
MISC
CMOS Generaꢁ pꢀrpose I/O. Register enabꢁed pꢀꢁꢁ-ꢀp and oꢀtpꢀt
NMOS NMOS strꢀctꢀre.
PB0
ST
PB0/SDO/INT1
PB1/SDI/SDA
PBꢅ/SCK/SCL
PBꢃ/AN0/SCS
SDO
INT1
—
—
—
CMOS SPI data oꢀtpꢀt
ST
—
Externaꢁ interrꢀpt 1 inpꢀt pin
PBPU
MISC
CMOS Generaꢁ pꢀrpose I/O. Register enabꢁed pꢀꢁꢁ-ꢀp and oꢀtpꢀt
NMOS NMOS strꢀctꢀre.
PB1
ST
SDI
—
—
ST
—
SPI data inpꢀt
SDA
ST NMOS IꢅC data
PBPU
MISC
CMOS Generaꢁ pꢀrpose I/O. Register enabꢁed pꢀꢁꢁ-ꢀp and oꢀtpꢀt
NMOS NMOS strꢀctꢀre.
PBꢅ
ST
ST
SCK
SCL
—
—
—
SPI seriaꢁ cꢁock
ST NMOS IꢅC cꢁock
PBPU
MISC
CMOS Generaꢁ pꢀrpose I/O. Register enabꢁed pꢀꢁꢁ-ꢀp and oꢀtpꢀt
NMOS NMOS strꢀctꢀre.
PBꢃ
ST
AN0
SCS
PB4
AN1
AUD
PCK
PB5
ANꢅ
PINT
PB6
ANꢃ
RES
PC0
AN4
OSCꢅ
PC1
AN5
OSC1
ADCR
—
AN
ST
—
—
A/D channeꢁ 0
SPI sꢁave seꢁect
PBPU
ADCR
DACTRL
—
ST CMOS Generaꢁ pꢀrpose I/O. Register enabꢁed pꢀꢁꢁ-ꢀp
AN CMOS A/D channeꢁ 1
PB4/AN1/AUD/
PCK
—
—
—
D/A oꢀtpꢀt pin
CMOS Peripheraꢁ cꢁock oꢀtpꢀt
PBPU
ADCR
—
ST CMOS Generaꢁ pꢀrpose I/O. Register enabꢁed pꢀꢁꢁ-ꢀp
PB5/ANꢅ/PINT
PB6/ANꢃ/RES
AN
ST
—
—
A/D channeꢁ ꢅ
Peripheraꢁ interrꢀpt
PBPU
ADCR
CO
ST CMOS Generaꢁ pꢀrpose I/O. Register enabꢁed pꢀꢁꢁ-ꢀp
AN
ST
—
—
A/D channeꢁ ꢃ
Reset pin
PCPU
ADCR
CO
ST CMOS Generaꢁ pꢀrpose I/O. Register enabꢁed pꢀꢁꢁ-ꢀp.
PC0/AN4/
OSCꢅ
AN
—
—
A/D channeꢁ 4
HXT HXT pin
PCPU
ADCR
CO
ST CMOS Generaꢁ pꢀrpose I/O. Register enabꢁed pꢀꢁꢁ-ꢀp.
PC1/AN5/
OSC1
AN
—
—
A/D channeꢁ 5
HXT/ERC pin
HXT
Rev. 1.00
1ꢅ
�ꢀꢁꢂ 0ꢃꢄ ꢅ01ꢅ
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
