The HT67F4892 is a Flash Memory A/D type 8-bit high performance RISC architecture microcontroller, designed especially for applications that interface directly to analog signals, such as those from sensors. Offering users the convenience of Flash Memory multi-programming features, this device also includes a wide range of functions and features. Other memory includes an area of RAM Data Memory as well as an area of true EEPROM memory for storage of non-volatile data such as serial numbers, calibration data etc.

Analog features include a multi-channel 12-bit A/D converter. Multiple and extremely flexible Timer Modules provide timing, pulse generation and PWM generation functions. Easy communication with the outside world is provided by including fully integrated SPI, I2C functions, popular interfaces which provide designers with a means of easy communication with external peripheral hardware. Protective features such as an internal Watchdog Timer, Low Voltage Reset and Low Voltage Detector coupled with excellent noise immunity and ESD protection ensure that reliable operation is maintained in hostile electrical environments.

A full choice of external, internal and high and low oscillators functions are provided including two fully integrated system oscillators which require no external components for their implementation. The ability to operate and switch dynamically between a range of operating modes using different clock sources gives users the ability to optimise microcontroller operation and minimise power consumption. The UART module is contained in the device. It can support the applications such as data communication networks between microcontrollers, low-cost data links between PCs and peripheral devices, portable and battery operated device communication, etc.

The inclusion of both LCD and LED driver functions allows for easy and cost effective solutions in applications that require interface to these display types. In addition, the inclusion of flexible I/O programming features, Time-Base functions along with many other features ensure that only a minimum of external components is required for application implementation, resulting in reduced component costs and reductions in circuit board areas.

CPU Features

• Operating Voltage:
  • fSYS =4MHz: 2.2V~5.5V
  • fSYS =8MHz: 2.2V~5.5V
  • fSYS =12MHz: 2.7V~5.5V
  • fSYS =16MHz: 4.5V~5.5V
• Up to 0.25us instruction cycle with 16MHz system clock at VDD =5V
• Power down and wake-up functions to reduce power consumption
• Four Oscillators:
  • - High Speed Internal RC -- HIRC
  • - Internal 32kHz RC -- LIRC
  • - High Speed External Crystal -- HXT
  • - External 32.768kHz Crystal -- LXT
• Multi-mode operation: NORMAL, SLOW, IDLE and SLEEP
• Fully integrated internal 8MHz oscillator requires no external components
• All instructions executed in 1~3 instruction cycles
• Table read instructions
• 115 powerful instructions
• 8-level subroutine nesting
• Bit manipulation instruction

Peripheral Features

• Flash Program Memory: 8Kx16
• RAM Data Memory: 384x8
• True EEPROM Memory: 64x8
• Watchdog Timer function
• Up to 50 bidirectional I/O lines
• 4 pin-shared external interrupts
• Multiple Timer Modules for time measure, input capture, compare match output, PWM output or single pulse output function
• Dual Time-Base functions for generation of fixed time interrupt signals
• 10-channel 12-bit resolution A/D converter
• LCD display
• - 32SEG x 4COM & 32SEG x 8COM for 52-pin LQFP package type
• - 28SEG x 4COM & 28SEG x 8COM for 48-pin LQFP package type
• - 1/3 or 1/4 bias
• LED display: 8SEG x 8COM
• Serial Interface Module with SPI and I2C interfaces
• Full-duplex Universal Asynchronous Receiver and Tranmitter Interface -- UART
• Low Voltage Reset function -- LVR
• Low Voltage Detect function --- LVD
• Package type: 48/52-pin LQFP
• Flash program memory can be re-programmed up to 10,000 times
• Flash program memory data retenction > 10 years
• True EEPROM data memory can be re-programmed up to 100,000 times
• True EEPROM data memory data retention > 10 years

Specification:

• max. frequency: 16MHz
• VDD: 2.2V~5.5V
• program memory: 8Kx16
• data memory: 384x8
• data EEPROM: 64x8
• stack: 8
• I/O: 50
• timer: 10-bit CTM×3, 10-bit PTM×1
• ADC: 12-bitx10
• LCD: 32x4, 32x8, 28x4, 28x8
• comparator: -
• interface: UARTx1, SPI/I²C×1
• case: 52LQFP