? 8 mhz bus operation at 5v operation for 125 nsec minimum instruction cycle time ? 4 mhz bus operation at 3v for 250 nsec minimum instruction cycle time ? efficient instruction set including multiply and divide ? 16 flexible addressing modes including stack relative with 16-bit stack pointer ? fully static low-voltage, low-power design with wait and stop modes ? object code compatible with the 68hc05 ? easy to learn and use architecture ? c optimized architecture provides compact code high-performance 68hc08 cpu core integrated second generation flash memory up to 33 bi-directional input/output (i/o) lines internal clock generator timebase module ? in-application re-programmable ? extremely fast programming, encoding 64 bytes in as fast as 2 msec ? flash programming across the 68hc08s full operating supply voltage with no extra programming voltage ? 10k write/erase cycles minimum over temperature ? flexible block protection and security ? cost-effective programming changes and field software upgrades via in-application programmability and re-programmability ? reduces production programming costs through ultra-fast programming ? allows re-programmable battery-powered applications ? byte-writable for data as well as program memory ? protects code from unauthorized reading and to guard against unintentional erasing/writing of user-programmable segments of code ? 10 ma sink/source on all i/o pins ? 15 ma sink capability on five i/o pins ? keyboard scan with selectable interrupts on eight i/o pins ? software programmable pullups on 23 i/o pins ? high-current i/o allows direct drive of led and other circuits to eliminate external drivers and reduce system costs ? keyboard scan with programmable pullups eliminates external glue logic when interfacing to simple keypads two programmable 16-bit timer channels ? 125 nsec resolution at 8 mhz bus ? free-running counter or modulo up-counter ? each channel independently programmable for input capture, output compare or unbuffered pwm ? pairing timer channels provides a buffered pwm function ? software-selectable bus frequencies ? 2% accurate with trim capability ? clock monitor ? option to allow use of external clock source or external crystal/ceramic resonator ? eliminates the need and cost for an external clock source ? improved accuracy across temperature and voltage ? 8 user-selectable periodic real-time interrupts ? optionally operate in low-power stop mode ? provides auto wakeup from low-power stop mode to maintain real-time clock or check external device status such as sensors features benefits the 68hc908gt16 and 68hc908gt8 are fully integrated microcontrollers created to make system design easier by eliminating external peripherals wherever possible. the internal clock generator eliminates the need for an external clock source and helps reduce system costs. the integrated second generation flash memory programs up to 100 times faster than prior flash solutions and offers in-application programming. features include a synchronous serial peripheral interface (spi), an asynchronous serial communications interface (sci), an analog-to-digital converter (adc), an auto wakeup from stop feature, low-voltage inhibit (lvi) and a watchdog timer. hc08 cpu 16k/8k flash lvi 512 ram internal clock generator cop kbi 8-ch 8-bit adc sci spi 2 x 2-ch 16-bit timer up to 36 gpio ? radar detectors ? industrial and home lighting ? security systems ? home appliances ? sensors ? electronic power meters ? wireless communication ? pda attachments target applications a flash mcu solution 68hc908gt16/gt8 8-bit microcontroller f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
motorola and the stylized m logo are registered in the u.s. patent and trademark office. this product incorporates superflash ? technology licensed from sst. all other product or service names are the property of their respective owners. ? motorola, inc. 2003 68hc908gt16pb/d rev 2 ? 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 eeprom, high-precision a/d d/a converters, real-time clocks, etc. serial peripheral interface ? issues reset in the event of runaway code computer operating properly watchdog timer ? improves reliability by resetting the mcu when voltage drops below trip point ? two trip points allow optimum operation in both 5v and 3v nominal systems ? integration reduces system cost selectable trip point low-voltage inhibit ? 8 channels ? single conversion in 17 sec ? fast, easy conversion from analog inputssuch as temperature, pressure and fluid levelsto digital values for cpu processing 8-bit analog-to-digital converter features benefits part number package temperature range mc68hc908gt16cfb 44 qfp -40 to 85c mc68hc908gt16cb 42 sdip -40 to 85c mc68hc908gt8cfb 44 qfp -40 to 85c mc68hc908gt8cb 42 sdip -40 to 85c sample packs package temperature range kmc908gt16cfb 44 qfp -40 to 85c kmc908gt16cb 42 sdip -40 to 85c package options a flash mcu solution 68hc908gt16/gt8 * all prices are manufacturers suggested resale for north america. serial communications interface ? 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 ? an1831/d using mc68hc908 on-chip flash programming routines ? eb366/d in-circuit programming of 68hc908gp32 flash memory ? an2093/d creating efficient c code for the mc68hc08 ? an1219/d m68hc08 integer math routines ? an1218/d hc05 to hc08 optimization ? an1837/d non-volatile memory technology review ? an1752/d data structures for 8-bit mcus ? an1705/d noise reduction techniques for mcu-based systems ? an1259/d system design and layout techniques for noise reduction in mcu-based systems ? an1263/d designing for electromagnetic compatibility with single-chip microcontrollers ? an1050/d designing for electromagnetic compatibility (emc) with hcmos microcontrollers ? an1705/d noise reduction techniques for microcontroller-based systems and many moresee our web site at http://www.motorola.com/mcu application notes and engineering bulletins resale individual development tool components easy-to-order development tool kits part number description m68ics08gpgt programmer/in-circuit $295 debug kit kitmmevs08gpgt cost-effective real-time $1450 in-circuit emulator kit kitmmds08gpgt high-performance real-time $3950 in-circuit emulator kit m68mmds0508 high performance emulator $2950 m68mmpfb0508 mmevs platform board $395 m68eml08gpgt emulation module daughter $495 board m68cbl05b low-noise flex cable $120 m68cbl05c low-noise flex cable $120 m68tc08gt16fb44 44-pin qfp target head adapter $250 m68tb08gt16b42 42-pin sdip target head adapter $100 m68tqs044sag1 44-pin tq socket with guides $50 m68tqp044samo1 44-pin tqpack $70 resale* 1atx46457-1 printed in usa 05/03 imperial litho 56466 5,000 litcsg1 f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
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