General Description; Block Diagram - Holtek BS83A04C Manual

BS83A04C
4-Key Enhanced Touch I/O Flash MCU

General Description

The device is a Flash Memory type 8-bit high performance RISC architecture microcontroller with
fully integrated touch key functions.
With all touch key functions provided internally, this device range has all the features to
offer designers a reliable and easy means of implementing Touch Keyes within their products
applications. The touch key functions are fully integrated completely eliminating the need for
external components.
For memory features, the Flash Memory offers users the convenience of multi-programming
features. Other memory includes an area of RAM Data Memory as well as an area of Emulated
EEPROM memory for storage of non-volatile data such as serial numbers, calibration data etc.
Protective features such as an internal Watchdog Timer and Low Voltage Reset functions coupled
with excellent noise immunity and ESD protection ensure that reliable operation is maintained in
hostile electrical environments.
This device includes fully integrated low and high speed oscillators which 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 optimise microcontroller
operation and minimise power consumption. Easy communication with the outside world is provided
using the internal I
function, Timer Module and many other features further enhance device functionality and flexibility.
The touch key device will find excellent use in a huge range of modern Touch Key product
applications such as low power consumption portable devices, household appliances, consumer
products, etc.

Block Diagram

Reset
ROM
Circuit
1K × 16
Emulated
Interrupt
INT
EEPROM
Controller
32 × 16
Pin-Shared
Watchdog
with Port A
Timer
HT8 MCU Core
Time Base
LIRC
32kHz
HIRC
8MHz
Clock System
: Pin-Shared Node : Bus Entry
Rev. 1.00
C interface, while the inclusion of flexible I/O programming features, Time-Base
2
RAM
128 × 8
Stack
4-Level
LVR
Digital Peripherals
Touch Key Module 0
MUX
7
2
I C
Pin-Shared Port A
Timer
Function Driver
I/O
C to F
KEY1~KEY4
Circuit
Pin-Shared
Touch Key Function
with Port A
PA0~PA7
March 24, 2020