HT45R2K-A Datasheet | Holtek Semiconductor

Features - Operating Voltage: - - f SYS= 4MHz: 2.2V~5.5V - - f SYS= 8MHz: 3.3V~5.5V - Oscillator types: - - External Crystal -- HXT - - External Low Speed Crystal -- LXT - - External RC -- ERC - - Internal High Speed RC -- HIRC - - Internal Low Speed RC -- LIRC - Up to 22 bidirectional I/O lines - One external interrupt input shared with an I/O lines - One 8-bit and two 16-bit programmable timer/event counters with overflow interrupt a 8-stage prescaler - LCD driver with 24×8 segments - 16K×16 program memory - 256×8 data memory - Single differential input channel dual slope Analog to Digital Convertor with Operational Amplifier - Watchdog Timer with regulator power - Buzzer output - HALT and wake-up functions to reduce power consumption - Internal voltage regulator (3.3V) and charge pump - Internal reference voltage generator (1.5V) - 8-level subroutine nesting - Bit manipulation instruction - 16-bit table read instruction - Up to 0.5μs instruction cycle with 8MHz system clock at VDD= 5V - 63 powerful instructions - All instructions in 1 or 2 machine cycles - Low voltage reset function - One vibration sensor input - Four touch-key inputs - Body Fat circuit - 80-pin LQFP package Rev. 1.40 March 12, 2015 HT45R2K-C/-B/-A Dual Slope 16K/8K/4K ASSP MCU for Body Fat Scale General Description The HT45R2K-C is an 8-bit high performance, RISC architecture microcontroller device, which with its A/D Converter and LCD driver, can directly interface to analog signals and to LCD panels. The device includes a range of other features such as low power consumption, I/O flexibility, timer functions, oscillator options, dual slope A/D convertor, HALT and wake-up functions, watchdog timer, vibration sensor etc. However as the device includes all the circuitry associated with body fat measurement the device is especially suitable for this specific application area, being able to significantly reduce the need for the usual external...