General Description

The FS9912 is a high performance, low cost CMOS 8-bit single chip microcontroller with embedded a 4kx16 bits ROM, an 8-channel 14-bit fully differential input analog to digital converter, low noise amplifier, and 4x16 LCD driver.

The FS9912 is best suited for applications such as low cost, high performance digital thermometer, ear thermometer, scale, barometer, and hygrometer.



8-bit microcontroller, 37 single word instructions
Embedded 4k x 16 program memory, 128-byte data memory
Voltage operation ranges from 2.4V to 3.6V, 4MHz crystal oscillator
Operation current is less than 2mA, sleep mode current is about 1gA (LVR disable)
Low voltage reset (LVR) function mask option. FS9912R_nnnV LVR enable, FS9912_nnnV LVR disable
8-level deep hardware stacks
5 Interrupt sources (external: 2, internal: 3)
8-channel 14-bit ADC (400mV input range, 2LSB linearity error) with 40Hz output rate
Embedded charge pumper and voltage regulator (4V regulated output)
Embedded bandgap voltage reference (typical 1.2V50mV, 100ppm/ XC)
Low noise (1gV Vpp without chopper, 0.5gV Vpp with chopper, 0.1Hz~1Hz) OPAMPs with chopper controller
16-bit bidirectional I/O port and buzzer output
Dual 24-bit programmable timers
4 x 16 LCD driver (3V Vpp)
Watchdog timer



Ear thermometer
Thermometer / Hygrometer
Scale / Barometer


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