General Description

The HT45F23A is a Flash Memory Tinypower A/D type 8-bit high performance RISC architecture

microcontrollers, designed especially for applications that interface directly to analog signals.

The HT45F23A device has a higher gain bandwidth making it more suitable for higher frequency

applications.

Features

CPU Features

• Operating voltage:

– fSYS= 32.768kHz: 2.2V~5.5V

– fSYS= 910kHz: 2.2V~5.5V

– fSYS= 2MHz: 2.2V~5.5V

– fSYS= 4MHz: 2.2V~5.5V

– fSYS= 8MHz: 3.3V~5.5V

• TinyPower technology for low power operation

• Power down and wake-up functions to reduce power consumption

• Oscillator types:

– External Crystal - HXT

– External 32.768kHz Crystal - LXT

– External RC - ERC

– Internal RC - HIRC

– Internal 32kHz RC - LIRC

• Multi-mode operation: Normal, Slow, Idle and Sleep

• Fully integrated internal 32kHz, 910kHz, 2MHz, 4MHz and 8MHz oscillator requires no external components

• Externally supplied system clock option

• All instructions executed in one or two machine Cycles

• Table read instructions

• 61 or 63 powerful instructions

• 6-level subroutine nesting

• Bit manipulation instruction

Peripheral Features

• Flash Program Memory: 2K×15

• RAM Data Memory: 128×8

• EEPROM Data Memory: 64×8

• Watchdog Timer function

• Up to 22 bidirectional I/O lines

• Software controlled 4-SCOM lines LCD COM driver with 1/2 bias

• Multiple pin-shared external interrupts

• Single 8-bit programmable Timer/Event Counter with overflow interrupt and Single 16-bit programmable Timer/Event Counter with overflow interrupt function

• Dual Time-Base functions

• Serial Interfaces Module - SIM for SPI or I2C

• Dual Comparator functions

• Dual Operational Amplifiers functions

• Operational Amplifier output to internal two channel 12-bit ADC function

• Up to 6 channel 12-bit ADC

• Up to 2 channel 8-bit PWM

• 12-bit Audio DAC output

• PFD/Buzzer for audio frequency generation

• Internal 2.4V/3.3V LDO

• Low voltage reset function

• Low voltage detect function

• 16-pin NSOP, 20/24-pin SSOP package types