These BS82D20A-3 are a series of Flash Memory type 8-bit high performance RISC architecture microcontrollers with fully integrated touch key functions. With all touch key functions provided internally and with the convenience of Flash Memory multi-programming features, these BS82D20A-3 has all the features to offer designers a reliable and easy means of implementing Touch Keyes within their products applications.

CPU Features

Operating voltage
– fSYS= 8MHz: VLVR~5.5V
– fSYS= 12MHz: 2.7V~5.5V
– fSYS= 16MHz: 4.5V~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
Three Oscillators
– High Speed Internal RC — HIRC: 8/12/16MHz
– Low Speed Internal RC — LIRC: 32kHz
– Low speed External Crystal — LXT: 32768Hz (only for BS82C16A-3 and BS82D20A-3)
Multi-mode operation: NORMAL, SLOW, IDLE and SLEEP
All instructions executed in one or two instruction cycles
Table read instructions
63 powerful instructions
Up to 8-level subroutine nesting
Bit manipulation instruction

Peripheral Features

Flash Program Memory: 2K×16 ~ 8K×16
RAM Data Memory: 384×8 ~ 768×8
True EEPROM Memory: 64×8
Fully integrated 12/16/20 touch key functions — require no external components
Watchdog Timer function
Up to 26 bidirectional I/O lines
PMOS Source Current Adjustable
Software controlled 4-SCOM lines LCD driver with 1/3 bias
One external interrupt line shared with I/O pin
Multiple Timer Module for time measure, input capture, compare match output, PWM output or
single pulse output function
Dual Time-Base functions for generation of fixed time interrupt signals
I2C Interface Module
UART Interface
Low voltage reset function
Low voltage detect function
Package: 20/24/28-pin SOP, 28-pin SSOP