HT45F8554
BMS Flash MCU
General Information
The HT45F8554 is a Flash Memory BMS 8-bit high performance RISC architecture microcontroller with an integrated accumulative cell voltage monitor module, designed for BMS applications.
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 true EEPROM memory for storage of non-volatile data such as serial numbers, calibration data etc.
Analog features include a multi-channel 12-bit A/D converter, a comparator, a high accuracy voltage regulator and Li-ion rechargeable battery protection functions. Multiple and extremely flexible Timer Modules provide timing, pulse generation and PWM output functions. Communication with the outside world is catered for by including fully integrated SPI, I2C, and UART interface functions, three popular interfaces which provide designers with a means of easy communication with external peripheral hardware. 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 external and internal low and high oscillator functions are provided including 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.
An accumulative cell voltage monitor and a high accuracy voltage regulator are provided for 3 to 8 cell Li-ion rechargeable battery applications. The accumulative cell voltage monitor is used to monitor an accumulative voltage from 1 to N and output the divide-by-N voltage to the analog multiplexer with a ±0.5% divided ratio accuracy which can then be connected to the integrated A/D converter channel for measurement.
The inclusion of flexible I/O programming features, Time Base functions along with many other features ensure that the device will find excellent use in applications such as handheld measurement instruments, electric power tools, handheld hair dryers, handheld vacuum cleaners in addition to many others.
CPU Features
| Attribute | Value |
|---|---|
| Operating Voltage |
|
| Up to 0.25μs instruction cycle with 16MHz system clock at VDD =5V | Available |
| Power down and wake-up functions to reduce power consumption | Available |
| Oscillator types |
|
| Multi-mode operation | FAST, SLOW, IDLE and SLEEP |
| Fully integrated internal oscillators require no external components | Available |
| All instructions executed in 1~3 instruction cycles | Available |
| Table read instructions | Available |
| 115 powerful instructions | Available |
| 8-level subroutine nesting | Available |
| Bit manipulation instruction | Available |
Peripheral Features
| Attribute | Value |
|---|---|
| Flash Program Memory | 8K×16 |
| RAM Data Memory | 512×8 |
| True EEPROM Memory | 128×8 |
| Watchdog Timer function | Available |
| In Application Programming – IAP | Available |
| 21 bidirectional I/O lines | Available |
| Two external interrupt lines shared with I/O pins | Available |
| Programmable I/O port source current for LED applications | Available |
| Multiple Timer Modules for time measure, compare match output, PWM output function or single pulse output function | Available |
| Serial Interfaces Module – SIM for SPI or I2C communication | Available |
| Fully-duplex Universal Asynchronous Receiver and Transmitter Interface – UART | Available |
| 8 external channel 12-bit resolution A/D converter with programmable internal reference voltage VR | Available |
| Single comparator function | Available |
| Dual Time Base functions for generation of fixed time interrupt signals | Available |
| Low Voltage Reset function | Available |
| Low Voltage Detect function | Available |
| 5V/30mA internal Voltage Regulator with ±1% accuracy | Available |
| Accumulative Cell Voltage Monitor | 8-to-1 Analog Multiplexer with divided ratio accuracy of 1/n ±0.5% |
| Sleep Mode with 0.1μA ultra-low standby current | Available |
| Direct High Voltage Wake-up function | Available |
| Package types | 28-pin SSOP, 48-pin LQFP-EP |
Resources
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