HT45F77 Description
This Holtek device is specifically designed for Body Fat Scale applications. Measuring body fat uses a technique whereby an AC current flowing through the human body is measured and then used to calculate a body fat value. The specialised circuits to do this are a weight measurement circuit and a fat measurement circuit.
HT45F77 Key Features
- Operating voltage -- fSYS=8MHz: 2.2V~5.5V -- fSYS=12MHz: 2.7V~5.5V -- fSYS=20MHz: 4.5V~5.5V
- Up to 0.2μs instruction cycle with 20MHz system clock at VDD=5V
- Power down and wake-up functions to reduce power consumption
- Four oscillators -- External Crystal
- HXT -- External 32.768kHz Crystal
- LXT -- Internal RC
- HIRC -- Internal 32kHz RC
- Multi-mode operation: NORMAL, SLOW, IDLE and SLEEP
- Fully integrated internal 4.8MHz, 4.8×2MHz and 4.8×3MHz oscillator requires no external ponents
- All instructions executed in 1~3 instruction cycles