FS91M68

1.

General Description

The FS91M68 is a 8-bit high performance and cost-efficient microcontroller with one R2F module and 3×13

LCD driver. The device is suited for use in low power LCD applications such as: thermometers etc.

2.

Features

8-bit microcontroller.

Embedded 1k-word ROM and 64-byte RAM.

1.5V battery operation, with about 40μA (Typ.) operation current, and 0.2μA (Typ.) sleep mode current.

One R2F (Resistance to Frequency) conversion module for sensor and reference resistors.

One high-speed comparator and one 16-bit counter with programmable gate time select.

Build-in voltage doubler for 1/3 duty, 1/2 bias 3×13 LCD driver.

Input port：4-bit; In / Out port：4-bit

Two buzzer outputs.

Build in low battery detector (LVD).

Package：Dice form (36 pins), 44-pin LQFP.

3.

Applications

Clinical thermometer.

R/C Type Sensor Measurement.

4.

Ordering Information

Product Number

Package Type

FS91M68-nnnV

Dice form of 36 pin

FS91M68-nnnV-PCD

44 pin QFP

Note1: Code number ”nnnV” is assigned for customer; ”nnn” = 001~999; ”V” means Version = A~Z.

Rev. 1.3

4/24