target applications ? high-brightness led ? lighting systems control ? toys ? small handheld devices ? space-constrained applications ? small appliances ? ac line voltage monitoring ? battery charger ? asic replacement overview the mc9rs08ka8 microcontroller unit (mcu) is an extremely cost-effective and highly integrated, device intended for home appliances, health care equipment and as a general-purpose microcontroller. this device is composed of standard on-chip modules including a very small and highly efficient rs08 cpu core, 254 bytes ram, 8k bytes flash, two 8-bit modulo timers,12-channel 10-bit adc, 2-channel 16-bit timer/pwm, inter-integrated circuit bus module, keyboard interrupt and analog comparator. the device is available in 16- and 20-pin packages. cost-effective development tools for more information on development tools, please refer to the freescale development tool selector guide (sg1011). codewarrior ? development studio for microcontrollers 6.1 complimentary* codewarrior development studio for microcontrollers is an integrated tool suite that supports software development for freescales 8-bit or 32-bit microcontrollers. designers can further accelerate application development with the help of the processor expert? tool, which is an award-winning rapid application development tool in the codewarrior tool suite. demo9rs08ka8 $50 msrp cost-effective demonstration board with potentiometer, leds and a built-in usb-bdm cable for debugging and programming. 8-bit microcontrollers mc9rs08ka8/4 package options part number package temp. range mc9rs08ka8cwg 16-pin soic -40 c to +85 c mc9rs08ka8cwj 20-pin soic -40 c to +85 c mc9rs08ka8cpj 20Cpin pdip -40 c to + 85 c mc9rs08ka8cpg 16-pin pdip -40 c to + 85 c mc9rs08ka4cwj 20-pin soic -40 c to + 85 c mc9rs08ka4cwg 16-pin soic -40 c to + 85 c mc9rs08ka4cpj 20Cpin pdip -40 c to + 85 c mc9rs08ka4cpg 16-pin pdip -40 c to + 85 c block diagram rs08 core lvd i 2 c kbi cop 8k flash 254b ram rs08bdm ics (internal clock source) +xosc comparator 2 x 8-bit modulo timer 2-ch., 16-bit timer 12-ch., 10-bit adc * subject to license agreement and registration
learn more: for current information about freescale products and documentation, please visit www.freescale.com . freescale and the freescale logo are trademarks or registered trademarks of freescale semiconductor, inc. in the u.s. and other countries. all other product or service names are the property of their respective owners. ? freescale semiconductor, inc. 2008. document number: mc9rs08ka8/4fs rev 1 features benefits 8-bit rs08 central processor unit (cpu) ? up to 10 mhz (bus frequency) rs08 cpu at 1.8 volts for 100 ns minimum instruction time ? offers high performance for applications operated by batteryeven at low voltage ? subset of hc08 instruction set with added bgnd instruction ? provides source code compatibility with 68hc05/68hc08/s08 ? allows easier code debugging through additional bgnd instruction ? offers direct access to the shadow pc register through additional sha and sla instructions ? supports tiny/short address mode ? allows single-byte instructions for the most frequently used operations, including inc, dec, add, sub, lda, sta and clr ? offers optimized coding effciency and code density ? index addressing scheme through memory mapped registers x and d[x] within the tiny address range ? allows emulation for hc08/s08-style zero-offset index addressing mode instructions ? performs index addressing through x and d[x] registers with all direct, tiny and short addressing instructions capable of operating on/with x and d[x] registers ? extends addressing to the entire memory space through the paging scheme ? 14 byte code-effcient ram ? x and d[x] mapped within code-effcient tiny address space ? 16 byte code-effcient peripheral register space ? enables direct access to the code-effcient ram through single-byte tiny/short address mode instructions ? provides code-effcient access to most frequently accessed peripherals within the short addressing space ? enables most frequently used variables and software fags to optimize coding effciency ? page window ? provides access to entire 8k through 128 pages of 64 bytes ? simplifed interrupt mechanism ? helps eliminate hardware overhead for the vector lookup and the stacking mechanism ? provides short wake-up latency for wait/stop ? sha/sla instructions enable multi-level software stacking implementation ? subroutine call/return mechanism ? allows single level of subroutine call through hardware stacking with a shadow pc register ? allows fast jump to subroutine (jsr/bsr) and return from subroutine (rts) operation integrated third-generation flash ? extremely fast, byte-writable programming up to 20 s/byte ? helps reduce production programming costs through ultra fast programming ? helps lower system power consumption from shorter writes ? offers 1 kb write/erase cycles minimum over temperature ? allows electrically erasable nonvolatile memory to help reduce frmware development cycle flexible clock options ? internal clock source module containing a frequency-locked loop (fll) controlled by internal or external reference ? helps eliminate the cost of all external clock components ? reduces board space ? increases system reliability ? provides more options to use internal or external reference clock ? precision trimming of internal reference allows typical 0.2 percent resolution and +1 percent to -1 percent deviation over operating temperature and voltage ? provides one of the most accurate internal clock sources on the market for the money ? internal reference clock can be trimmed from 31.25 khz to 39.065 khz, allowing for maxim 10 mhz bus frequency output ? allows for trimming to adjust bus clock in specifc applications timer ? 2 x 8-bit modulo timer with 8-bit prescaler ? generates periodic trigger for time-based software loops using timer overfow interrupt ? 2-ch., 16-bit timer/pwm ? provide selectable input capture, output compare or buffered edge or center-aligned pwm on each channel ? allows external timer clock source ? utilizes tclk input as event trigger; the timer can be used as an 8-bit event counter adc ? 12-ch., 10-bit resolution ? easily interface to analog inputs ? 2.5 s conversion time; automatic compare function ? 400 sample/second conversion rate allows for sampling high-speed signals ? used to set conversion complete and generate interrupt only when result matches condition, freeing up system resources ? trigger conversion using rti counter ? takes periodic measurements without cpu involvement ? can be used in stop3 with compare function to take measurements and wake mcu only when compare value is reached analog comparator ? option to compare to internal reference ? requires only a single pin for input signal ? option to route comparator output directly to pin ? allows other components in system to see result of comparator with minimal delay ? allows operation in mcu stop mode ? offers function to wake up the mcu from wait/stop i 2 c ? inter-integrated circuit bus module capable of operation up to 100 kbps with maximum bus loading ? provide communication interface ? extend more peripheral real-time interrupt ? real-time interrupt trigger with 3-bit prescaler ? built-in low-power 1 khz clock source ? allows periodic wake-up or software trigger with delay ranging from 8 ms to 1.024s ? options to use low-power 1 khz internal clock to drive the rti ? minimizes power consumption in mcu stop up to 18 gpios including one output-only and one input-only pin ? software selectable pull-ups on ports when used as input (internal pull-up on reset) ? eliminates need for external resistors to help reduce customer system cost ? software selectable slew rate control on ports when used on output ? confgures ports for slower slew rate to help minimize noise emissions from the mcu ? 8-pin keyboard interrupt module with software selectable polarity on edge or edge/level modes ? helps to virtually eliminate external glue logic when interfacing to simple keypads using keyboard scan with programmable pull- up/pull-down functionality system protection ? watchdog computer operating properly (cop) reset with option to run from dedicated 1 khz internal clock source or bus clock ? resets device in instance of runaway or corrupted code ? helps protect in case of clock loss with independent clock source ? low voltage detection with reset or interrupt ? allows system to write/save important variables before voltage drops to low ? holds devices in reset until reliable voltage levels are reapplied to the part ? illegal opcode and illegal address detection with reset ? resets device in instance of runaway or corrupted code ? security feature for fash ? helps prevent unauthorized access to memory to protect valuable software intellectual property background debugging system ? on-chip bdm ? provides single-wire debugging and emulation interface ? eliminates need for expensive emulation tools ? provides circuit emulation without the need for additional, expensive development hardware package ? pin-compatible with sh, qg family ? easy migration within freescale controller continuum mcu family
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