MC908QB4MDWER

8-bit Microcontrollers MC908QB8/4 Target Applications > Discrete replacement > Appliances > Control systems > Home and industrial security systems Features > Fluorescent light ballasts > Electromechanical replacement > Motion control Overview Freescale Semiconductor’s MC908QB8/4 microcontrollers (MCUs) help reduce system cost by eliminating the need for external low-voltage inhibit (LVI), external drivers with high-current input/output (I/O) and external data EEPROM and help reduce programming cost with fast Flash programming. Other valuable features include a 10-bit analog-to-digital converter (ADC) and an internal clock oscillator. It helps maximize efficiency and speed time to market with the ability to change code in-application with Flash and free professional-quality development tools including a C compiler, simulator, assembler, linker, Flash programmer and auto-code generator, all specifically geared to function with Freescale’s QY/QB lines of MCUs. Benefits High-Performance 68HC08 CPU Core > 8 MHz bus operation at 5V operation for 125 ns minimum instruction cycle time > 4 MHz bus operation at 3V operation for 250 ns minimum instruction cycle time > Efficient instruction set, including multiply and divide > 16 flexible addressing modes, including stack relative with 16-bit stack pointer > Easy to learn and use architecture > Object compatible with 68HC05 > Allows for efficient, compact modular coding in assembly or C compiler Integrated Second-Generation Flash Memory > In-application reprogrammable > Cost-effective programming changes and field software upgrades via in-application programmability and reprogrammability > Virtually eliminates scrap, costly rework and cost of socket > The benefits of Flash at competitive one-time programmable (OTP) prices > Extremely fast programming • As fast as 32 μs/byte • Up to 100x faster than most embedded Flash > Helps to reduce production programming costs through ultra-fast programming > Helps to reduce power and speed application when writing nonvolatile data is required > Flash easily used for data EEPROM • 10K minimum write/erase cycles across temperature • 100K typical • Byte writeable • No restrictions or special instructions to access data in Flash program memory > Virtually eliminates the need and cost for external serial data EEPROM > Easily performs table lookup and data manipulation without slow and cumbersome special table instructions > Flexible block protection and security > Helps to protect code from unauthorized reading > Guards against unintentional writing/erasing of user-programmable segments of code HC08 CPU Internal Clock Oscillator 4 KB/8 KB Flash KBI 256 B RAM COP > > > > 3.2 MHz nominal bus frequency ± 25 percent trimmable ± 5 percent accurate to 125°C ± 2 percent typical 4-ch.,16-bit Timer > Can eliminate the cost of all external clock components > Helps to reduce board space > Can eliminate electromagnetic interface (EMI) generated from external clocks > Allows option of external radio controller (RC), external clock or external crystal/resonator Up to 13 Bidirectional Input/Output (I/O) Lines LVI 10 ch.,10-bit ADC Up to 13 GPIO ESCI SPI > High-current drive > Programmable pull-ups/keyboard interrupt > High-current I/O allows direct drive of LED and other circuits to virtually eliminate external drivers and reduce system costs > Keyboard scan with programmable pull-ups virtually eliminates external glue logic when interfacing to simple keypads Features Benefits 10-bit Analog-to-Digital Converter (ADC) > Up to 10 channels Four Programmable 16-bit Timer Channels > Free-running counter or modulo up-counter > Each channel independently programmable for input capture, output compare or unbuffered pulse-width modulation (PWM) > Pairing timer channels provides a buffered PWM function System Protection > COP watchdog timer with autowake-up from stop capability > Low-voltage inhibit with selectable trip points > Provides system protection in the event of runaway code by resetting the MCU to a known state > Helps to reduce power usage while automatically providing wake-up to check external sensors or perform periodic servicing > Designed to improve reliability by resetting the MCU when voltage drops below trip point Enhanced Serial Communications Interface (ESCI) > UART asynchronous communications system > Flexible baud rate generator > Double buffered transmit and receive > Optional hardware parity checking and generation > Enables synchronous serial communications with peripheral devices > Allows full-duplex, asynchronous, NRZ serial communication between the MCU and remote devices Serial Peripheral Interface > Full-duplex 3-wire synchronous transfers > Maximum master bit rate of 4 MHz for 8 MHz system clock > High-speed synchronous communication between multiple MCUs or between MCU and serial peripherals > Cost-effective serial peripheral expansion to applications including EEPROM, high-precision analog-to-digital and digital-to-analog converters, and real-time clocks Learn More: For more information about Freescale’s products, please visit www.freescale.com. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. This product incorporates SuperFlash® technology licensed from SST. © Freescale Semiconductor, Inc. 2005 Document Number: MC908QB84FS REV 0 AN2305 User Mode Monitor Access for MC68HC908QT/QY Series MCUs AN2312 QY4 Internal Oscillator Usage Notes AN2317 Low-Cost Programming and Debugging Options for M68HC08 MCUs > Fast conversion in Easy interface to analog inputs, such as sensors > 125 ns resolution at 8 MHz Application Notes Data Sheets MC68HC908QB8 Data Sheet for QB8/QB4/QY8 Package Options Part Number Package Temp. Range MC908QB4CPE MC908QB4VPE MC908QB4MPE MC908QB4CDWE MC908QB4VDWE MC908QB4MDWE MC908QB4CDTE MC908QB4VDTE MC908QB4MDTE MC908QB8CPE MC908QB8VPE MC908QB8MPE MC908QB8CDWE MC908QB8VDWE MC908QB8MDWE MC908QB8CDTE MC908QB8VDTE MC908QB8MDTE 16 DIP 16 DIP 16 DIP 16 SOIC 16 SOIC 16 SOIC 16 TSSOP 16 TSSOP 16 TSSOP 16 DIP 16 DIP 16 DIP 16 SOIC 16 SOIC 16 SOIC 16 TSSOP 16 TSSOP 16 TSSOP -40°C to +85°C -40°C to +105°C -40°C to +125°C -40°C to +85°C -40°C to +105°C -40°C to +125°C -40°C to +85°C -40°C to +105°C -40°C to +125°C -40°C to +85°C -40°C to +105°C -40°C to +125°C -40°C to +85°C -40°C to +105°C -40°C to +125°C -40°C to +85°C -40°C to +105°C -40°C to +125°C