Holtek is delighted to announce the release of a new generation of touch key Flash MCU series devices, the BS83B series. This BS83B Flash MCU series contains three devices; the BS83B08-3 with 8 touch keys, the BS83B12-3 with 12 touch keys and the BS83B16-3 with 16 touch keys.
The touch key functions are implemented using internal oscillator circuits and timers. When human contact is detected, the change in oscillator external capacitance results in a change of oscillator frequency leading to a resulting change in a timer value. This feature coupled with a channel encoder for multiple-channel scanning, enables the touch key functions within the BS83B series to detect which switches have been touched. One unique and special feature of the BS83B series touch key devices is that external reference capacitors are not required with switch sensitivity being adjusted by the application program.
Features
CPU Features
- Operating Voltage:
- fSYS= 8MHz: VLVR~5.5V
- fSYS= 12MHz: 2.7V~5.5V
- fSYS= 16MHz: 4.5V~5.5V
- Fully integrated 8/12/16 touch key functions -- require no external components
- Power down and wake-up functions to reduce power consumption
- Fully integrated low and high speed internal oscillators
- Low Speed -- 32kHz
- High speed -- 8MHz, 12MHz, 16MHz
- 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 4 subroutine nesting levels
- Bit manipulation instruction
Peripheral Features
- Flash Program Memory: 2Kx15
- RAM Data Memory: 160x8 ~ 288x8
- EEPROM Memory: 64x8
- Watchdog Timer function
- Up to 21 bidirectional I/O lines
- External interrupt line shared with I/O pin
- Single 8-bit Timer/Event Counter
- Single Time-Base functions for generation of fixed time interrupt signals
- I2C and SPI interfaces
- Low voltage reset function
- 8/12/16 touch key functions
BS83B Block Diagram
This BS83B Flash MCU device range will be especially suitable for use in numerous multiple switch home appliance applications such as blenders, extractors, electric pressure cookers, disinfecting machines, intelligent refrigerators etc. Their many internal special features offer the benefits of reduced PCB areas, simplified circuitry and minimal external components.
As is the case with the full Holtek 8-bit MCU device range, this new device is no exception in offering excellent noise rejection and protection features. The internal Watchdog Timer and Low Voltage Reset functions provide excellent immunity against malfunction or erroneous operation. Regarding device packaging, the BS83B08-3 is supplied in a 16-pin NSOP package while the BS83B12-3 is available in 20-pin SOP/SSOP packages and the BS83B16-3 is available in a 24-pin SOP/SSOP package.
