preliminary w541c232 data sheet 4-bit microcontroller table of contents- 1. general des cription ......................................................................................................... 2 2. features ....................................................................................................................... .......... 2 3. pin config urati on .............................................................................................................. .4 4. block di agram .................................................................................................................. .... 5 5. pin descri ption ................................................................................................................ ..... 6 6. elecrical chara cteristics ............................................................................................. 7 6.1. abs o lute maxi mum rati ngs .......................................................................................... 7 6.2. d.c. charac te ris t ic s ...................................................................................................... 7 6.3. a.c. charac te ris t ic s ....................................................................................................... 8 7. typical applicat ion circui t ............................................................................................. 9 8. revision history ............................................................................................................... .1 0 publ i c at i on rel e ase dat e : jul y 27, 2004 - 1 - revi si on a1
preliminary w541c232 1. general description the w541c232 is high-performance 4-bit microcontroller ( c) that provides an lcd driver. the device contains a 4-bit alu, two 8-bit timer, two dividers, a 16 4 lcd driver, and three 4-bit i/o ports. there are also three interrupt sources and 8- level subroutine nesting for interrupt applications. the w541c232 has two power reduction modes, hold mode and stop mode, which help to minimize power dissipation. the w541c232 has two oscillator circuits and can wo rk in dual-clock or single-clock operation mode. it is suitable for remote controllers, watches and clocks, speech synthesis lsi controllers, hand-held games and other products. 2. features ? operating voltage: 2.4v to 5.5v (lcd drive voltage: 3.0v, or 4.5v) ? dual clock operation ? sub-oscillator is 32.768k crystal for dual clock mode by mask option. ? main oscillator is built-in 4m/ 2mhz/ 1mhz/ 512khz/ 256khz rc oscillation by mask option. ? memory ? 2048 16 bit program rom (including 2k 4 bit look-up table) ? 128 4 bit data ram (including 16 working registers) ? 16 4 lcd data ram ? 14 input/output pins ? ports for input only: 1 ports/4 pins ? input/output ports: 2 ports/8 pins ? mfp different output pin: 2 pin (mfp & mfpb) ? do not be floating when it is as i nput or output open-drain (nmos type). ? power-down mode ? hold function: no operation (except for oscillator) ? five types of interrupts ? four internal interrupts (divider 0, divider 1, timer 0, timer 1) ? one external interrupt (port rc) ? lcd driver output ? 16 segment 4 common ? static, 1/2 duty (1/2 bias), 1/3 duty (1/2 or 1/3 bias), 1/4 duty (1/3 bias) driving mode can be select ed ? lcd driver output pins can be used as dc output ports; selectable by code option - 2 -
preliminary w541c232 ? mfp output pin ? output is software selectable as modulating or nonmodulating frequency ? works as frequency output specified by timer 1 ? mfpb is mfp?s inverse output of mfp pin ? two built-in 14-bit clock frequency divider circuit (divider 0 and divider 1) ? two built-in 8-bit programmable countdown timers ? timer 0: one of two internal clock frequencies (f os c /4 or f os c /1024) can be selected ? timer 1: includes an auto-reload function; and one of two internal clock frequencies (f os c or fosc/64) can be selected or falling edge of pin rc.0 can be selected (output through mfp pin) ? built-in 18/14-bit watchdog timer selectable for system reset ? powerful instruction set: 115 instructions ? 8-level subroutine (include interrupt) nesting ? up to 1 s instruction cycle (with 4 mhz operating frequency) ? package type is 48-pin lqfp publ i c at i on rel e ase dat e : jul y 27, 2004 - 3 - revi si on a1
preliminary w541c232 3. pin configuration - 4 -
preliminary w541c232 4. block diagram publ i c at i on rel e ase dat e : jul y 27, 2004 - 5 - revi si on a1
preliminary w541c232 5. pin description s y m b o l i / o f u n c t i o n x i n i input pin for sub-oscillator. connect ed to a. external 5~20pf capacitor uses to get accurate freq in crystal mode. x o u t o output pin for sub-oscillator. connect ed to a crystal. 20pf capacitor is built in internal for crystal mode. ra0 ? ra3 i/o input/output port. input/output mode specified by port mode 1 register (pm1). rb0 ? rb3 i/o input/output port. input/output mode specified by port mode 2 register (pm2). rc0 ? rc3 i 4-bit port for input only. each pin has an independent interrupt capability. and build-in schmitt trigger mfp o output pin only. this pin can output modulating or nonmodulating frequency, or timer 1 clock output specified by mode register 1 (mr1). mfpb o output pin only. this pin is inverse output of mfp pin. res i system reset pin with pull-high resistor. seg0 ? seg15 o lcd segment output pins. can also be used as dc output por ts specified by code option. com0 ? com3 o lcd common signal output pins. static com0 com1 com2 com3 used not used 1/2 duty not used not used not used not used 1/3 duty not used 1/4 duty used used used used used used used used used the lcd alternating frequency can be selected by code option. dh1, dh2 i connection terminals for voltage doubler (halver) capacitor. v dd1 , v dd2, v dd3 i positive (+) supply voltage terminal. refer to functional description. v dd i positive power supply (+). v ss i negative power supply (-). - 6 -
preliminary w541c232 6. elecrical characteristics 6.1. absolute maximum ratings p a r a m e t e r r a t i n g u n i t supply voltage to ground potential -0.3 to +7.0 v applied input/output voltage -0.3 to +7.0 v power dissipation 120 mw ambient operating temperature 0 to +70 c storage temperature -55 to +150 c note: ex posure to conditions bey ond those listed under absolute ma x i mum ratings may adversely affect the life and reliability of the device. 6.2. d.c. characteristics (v dd ? v ss = 3.0v, fm = 2 mhz, fs = 32.768 khz, t a = 25 c, lcd on; unless otherw i se specified) parameter sym. conditions min. typ. max. unit op. voltage v dd - 2 . 4 - 5 . 5 v op. current i op 1 no load (ext-v) in dual-clock normal operation - 1 5 0 4 0 0 a hold current i hm1 hold mode no load (ext-v) in dual-clock normal operation - 6 0 1 2 0 a hold current i hm2 hold mode no load (ext-v) in dual-clock slow operation and fm is stopped - 3 6 a input low voltage v il - v ss - 0.3 v dd v input high voltage v ih - 0.7 v dd - v dd v mfp output low voltage v ml i ol = 2.7 ma - - 0.4 v mfp output high voltage v mh i oh = 2.7 ma 2.4 - - v port ra/rb output low voltage v abl i ol = 2.0 ma - - 0.4 v port ra/rb output high voltage v abh i oh = 2.0 ma 2.4 - - v publ i c at i on rel e ase dat e : jul y 27, 2004 - 7 - revi si on a1
preliminary w541c232 d.c. characteristics, continue p a r a m e t e r s y m . c o n d i t i o n s m i n . t y p . m a x . unit lcd supply current i lcd all seg. on - - 6 a seg0 ? seg15 sink current (used as lcd output) i ol1 v ol = 0.4v v lcd = 0.0v 0 . 4 - - a seg0 ? seg15 drive current (used as lcd output) i oh1 v oh = 2.4v v lcd = 3.0v 0 . 3 - - a segment output low voltage (used as dc output) v sl i ol = 0.6 ma - - 0.4 v segment output high voltage (used as dc output) v sh i oh = 3 a 2 . 4 - - v input port pull-up resistor r cd p o r t r c 1 0 0 2 5 0 5 0 0 k ? res pull-up resistor r res - 5 0 1 3 0 2 5 0 k ? 6.3. a.c. characteristics (v dd ? v ss = 3.0v, t a = 25 c, unless otherw i se specified) parameter sym. conditions min. typ. max. unit rc type - - 4000 op. frequency f os c crystal type 1 (option low speed type) - 3 2 . 7 6 8 - khz frequency deviation by voltage drop for 2mhz rc oscillator ? f f f(3v) f (2.4v) f(3v ) ? - - 2 0 % i n st ruct ion cy cle time t i one machine cycle - 4/f os c - m s res e t ac tive width t raw f os c = 32.768 khz 1 - - s interrupt ac tive width t iaw f os c = 32.768 khz 1 - - s - 8 -
preliminary w541c232 7. typical application circuit ra rb rc lcd seg0~15 & com0~3 resb xin xout dh1 dh2 vdd1 vdd2 vdd3 vdd vss mfp connect it according to setting vdd publ i c at i on rel e ase dat e : jul y 27, 2004 - 9 - revi si on a1
preliminary w541c232 - 10 - 8. revision history v e r s i o n d a t e p a g e reasons for c h a n g e a1 july, 2004 - new create headquarters no. 4, creation rd. iii, science-based industrial park, hsinchu, taiwan tel: 886-3-5770066 fax: 886-3-5665577 http://www.winbond.com.tw/ taipei office tel: 886-2-8177-7168 fax: 886-2-8751-3579 winbond electronics corporation america 2727 north first street, san jose, ca 95134, u.s.a. tel: 1-408-9436666 fax: 1-408-5441798 winbond electronics (h.k.) ltd. no. 378 kwun tong rd., kowloon, hong kong fax: 852-27552064 unit 9-15, 22f, millennium city, tel: 852-27513100 please note that all data and specifications are subject to change without notice. all the trade marks of products and companies mentioned in this data sheet belong to their respective owners. winbond electronics (shanghai) ltd. 200336 china fax: 86-21-62365998 27f, 2299 yan an w. rd. shanghai, tel: 86-21-62365999 winbond electronics corporation japan shinyokohama kohoku-ku, yokohama, 222-0033 fax: 81-45-4781800 7f daini-ueno bldg, 3-7-18 tel: 81-45-4781881 9f, no.480, rueiguang rd., neihu district, taipei, 114, taiwan, r.o.c.
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