BH67F5245
24-Bit Delta Sigma A/D Flash MCU Integrated Regulator & Touch Key & LCD Driver
The BH67F5245 is a Flash Memory A/D type 8-bit high performance RISC architecture microcontroller which includes a multi-channel 24-bit Delta Sigma A/D converter, designed for applications that interface directly to analog signals and which require a low noise and high accuracy analog-to-digital converter. Offering users the convenience of Flash Memory multi-programming features, this device also includes a wide range of functions and features. Other memory includes an area of RAM Data Memory as well as an area of true EEPROM memory for storage of non-volatile data such as serial numbers, calibration data etc.
Analog features include a multi-channel 24-bit Delta Sigma A/D Converter and Programmable Gain Amplifier fucntions. Extremely flexible Timer Module provides timing, pulse generation and PWM generation functions. Communication with the outside world is implemented using a fully integrated UART interface, a popular interface which provides designers with a means of easy communication with external peripheral hardware. In addition, an internal LDO function provides various power options for both internal function and external device usage. 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 low and high oscillator functions are provided including two fully integrated system 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. The inclusion of flexible I/O programming features, a fully integrated LCD driver, a 4 key touch key inputs, Time-Base functions along with many other features ensure that the device will find excellent use in applications such as weight scales, electronic metering, environmental monitoring, handheld instruments, household appliances, electronically controlled tools, motor driving in addition to many others.
Product Details
- Operating Voltage:
fSYS= 4MHz: 2.2V~5.5V
fSYS= 8MHz: 2.2V~5.5V
fSYS= 12MHz: 2.7V~5.5V - Up to 0.33us instruction cycle with 12MHz system clock at VDD= 5V
- Power down and wake-up functions to reduce power consumption
- Oscillators:
– Internal High Speed 4/8/12MHz RC Oscillator – HIRC
– Internal Low Speed 32kHz RC Oscillator – LIRC - Fully integrated internal oscillators require no external components
- Multi-mode operation: FAST, SLOW, IDLE and SLEEP
- All instructions executed in 1~3 instruction cycles
- Table read instructions
- 115 powerful instructions
- 6-level subroutine nesting
- Bit manipulation instruction
- Flash Program Memory: 4Kx16
- RAM Data Memory: 256×8
- True EEPROM Memory: 32×8
- Watchdog Timer function
- Up to 21 bidirectional I/O lines
- 2 differential or 4 single-end channels 24-bit resolution Delta Sigma A/D converter
- LCD driver function
- 4 Touch Key inputs
- Internal Comparator
- Two pin-shared external interrupts
- Timer Module for time measure, compare match output or PWM output function
- UART Interface for full duplex asynchronous communication
- Dual Time-Base functions for generation of fixed time interrupt signals
- Low Voltage Reset function – LVR
- Low Voltage Detect function – LVD
- Package type: 24/28-pin SSOP
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Design And Development
BMHB7001 Touch and LCD MCU Development Board
Description
The BMHB7001 is a development board for Holtek 24-Bit Delta Sigma A/D Flash MCU BH67F5245. It is designed and produced by Best Health Electronics Inc.
The BH67F5245 includes an integrated LDO whose output can be used as a power supply for external sensors, such as those for weight, pressure and temperature measurements. As the device also includes fully integrated touch key circuits, it is an excellent choice for product such as touch key electronic scales which have an LCD display.