General Description：

The devices are OTP type 8-bit high performance RISC architecture microcontrollers, designed for Touch Key product applications.For memory features, the devices are supplied with One-Time Programmable, OTP memory. Other memory includes an area of RAM Data Memory.Analog features include multiple extremely ffexible Timer/Event Counters, an 8-bit PWM circuit and a Timer Module which provide timing, pulse generation, PWM generation and other functions. 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 internal high and low speed oscillators are provided and the two fully integrated system oscillators 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 optimize microcontroller operation and minimize power consumption. Easy communication with the outside world is provided using the internal I²C interface.

The devices include 2~16 touch keys which can detect human body contact using external touch pads. The high level of device integration enable applications to be implemented with a minimum number of external components.Special internal circuitry is also employed to ensure excellent power noise rejection to reduce the possibility of false detections, increasing the touch switch application reliability under adverse environmental conditions. With auto-calibration, low standby current, excellent resistance to voltage fuctuation and other features, this range of touch key devices provide a simple and effective means of implementing touch key operation in a wide variety of applications.

Features：

CPU Features:

• Operating voltage

♦ BS23A02CA/BS23B04CA/BS23B08CA:

– fSYS=8MHz: 2.0V~5.5V

♦ BS23B16CA:

– fSYS=8MHz: 1.8V~5.5V

– fSYS=12MHz: 2.7V~5.5V

– fSYS=16MHz: 3.3V~5.5V

• Up to 0.25μs instruction cycle with 16MHz system clock at VDD=5V

• Power down and wake-up functions to reduce power consumption

• Oscillator types

♦ Internal High Speed 8/12/16MHz RC – HIRC

♦ Internal Low Speed 32kHz RC – LIRC

• Multi-mode operation: FAST, SLOW, IDLE and SLEEP

• Fully integrated internal oscillators require no external components

• All instructions executed in one or two instruction cycles

• Table read instructions

• 61 powerful instructions

• Up to 6-level subroutine nesting

• Bit manipulation instruction

Peripheral Features

• OTP Program Memory: (1K-16)×14~(2K-16)×16

• Data Memory: 64×8~512×8

• OTP ROM Parameter Program – ORPP (for BS23B04CA, BS23B08CA and BS23B16CA)

• Watchdog Timer function

• Up to 22 bidirectional I/O lines

• Single external interrupt line shared with I/O pin

• Multiple 8-bit programmable Timer/Event Counters with PWM output (for BS23B04CA and 

BS23B08CA)

• Single 8-bit programmable Timer/Event Counter (for BS23B16CA)

• Single 3-channel 8-bit Pulse Width Modulator (for BS23B16CA)

• Single 10-bit Periodic Type Timer Module for time measurement, capture input, compare match 

output, PWM output or single pulse output function (for BS23B16CA)

• I²C interface (for BS23B04CA, BS23B08CA and BS23B16CA)

• Up to 16 touch key functions

• Up to two Time-Base functions for generation of ffxed time interrupt signals

• Low voltage reset function

• Low voltage detect function (for BS23B16CA)

• Package types: SOT23-6, 8-pin SOP, 10-pin MSOP, 16-pin NSOP, 20/24-pin SSOP