HT45R22E Holtek Semiconductor, HT45R22E Datasheet - Page 3

• Manufacturer Part Number: HT45R22E
• Description: Remote Type 8-bit OTP MCU
• Manufacturer: Holtek Semiconductor

Pin Description
Rev. 1.00
PA0/PFD/A1N
PA1/PFD/A1X
PA2/TC0/A0X
PA3/INT/A0N
PA4/TC1/A0P
PA5/OSC2
PA6/OSC1
PA7/RES
PB0/SCOM0/WP
PB1/SCOM1/SCL
PB2/SCOM2/SDA
PB3/SCOM3
PB4, PB5
Pin Name
Function
SCOM0
SCOM1
SCOM2
SCOM3
OSC2
OSC1
PFD
PFD
RES
SDA
PA0
A1N
PA1
A1X
PA2
TC0
A0X
PA3
A0N
PA4
TC1
A0P
PA5
PA6
PA7
PB0
PB1
SCL
PB2
PB3
PBn
INT
WP
COPA3C OPAI
COPA3C
COPA3C
COPA3C OPAI
COPA3C OPAI
SCOMC
SCOMC
SCOMC
SCOMC
CTRL0
CTRL0
PAWK
PAWK
PAWK
PAWK
PAWK
PAWK
PAWK
PAWK
PAPU
PAPU
PAPU
PAPU
PAPU
PAPU
PAPU
PBPU
PBPU
PBPU
PBPU
PBPU
OPT
CO
CO
CO
OSC
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
I/T
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS PFD output
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS Complementary PFD output
OPAO OPA1 output pin
CMOS General purpose I/O. Register enabled pull-up and wake-up.
OPAO OPA0 output pin
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS General purpose I/O. Register enabled pull-up and wake-up.
NMOS General purpose I/O. Register enabled wake-up.
CMOS General purpose I/O. Register enabled pull-up.
SCOM Software controlled 1/2 bias LCD COM
CMOS General purpose I/O. Register enabled pull-up.
SCOM Software controlled 1/2 bias LCD COM
CMOS General purpose I/O. Register enabled pull-up.
SCOM Software controlled 1/2 bias LCD COM
CMOS General purpose I/O. Register enabled pull-up.
SCOM Software controlled 1/2 bias LCD COM
CMOS General purpose I/O. Register enabled pull-up.
OSC
O/T
3
OPA1 inverting input pin
External Timer 0 clock input
External interrupt input
OPA0 inverting input pin
External Timer 1 clock input
OPA0 non-inverting input pin
Oscillator pin
Oscillator pin
Reset input
EEPROM write protect pin
EEPROM serial clock input pin
EEPROM serial data pin
Description
HT45R22E
March 17, 2010
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