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w541e/c261 data sheet 4bit microcontroller, 2k 16 rom, 128 4 ram 128 -dot lcd publication release date: june 12, 2007 - 1 - revision a1 table of contents- 1. introduction ......................................................................................................................... 2 2. features ................................................................................................................................. 3 3. architecture ........................................................................................................................ 5 3.1 block diagram .......................................................................................................... 5 3.2 pin configuration ................................................................................................... 6 3.3 pad description ....................................................................................................... 7 4. absolute maximum ratings ............................................................................................. 8 5. dc characteristics ............................................................................................................ 9 6. ac characteristics .......................................................................................................... 10 7. typical application circuit ........................................................................................... 11 8. package dimension ........................................................................................................... 12 9. version history ................................................................................................................. 13
w541e/c261 data sheet - 2 - 1. introduction the w541e261 and W541C261 are high-performance 4-bit microcontroller ( c) with an lcd driver and the flash eeprom and mask rom for the program memory. the device contains a 4-bit alu, two 8-bit timers, two dividers, a 32 4 lcd driver, and five 4-bit i/o ports (including 1 output port to drive the leds). there are also five interrupt sources and 8-level subroutine nesting for interrupt applications. the w541e261 and W541C261 have tw o power reduction modes, hold mode and stop mode, which help to minimize power dissipation. the w541e261 and W541C261 have two oscillator circuits and can work in dual-clock or single-clock operation mode. it is suitable for remote contro llers, watches and clocks, speech synthesis lsi controllers, hand-held games and other products.
w541e/c261 data sheet publication release date: june 12, 2007 - 3 - revision a1 2. features ? operating voltage: 2.4v to 5.5v (lcd drive voltage: 3.0v, or 4.5v) ? operating frequency up to 4 mhz ? crystal/rc oscillation circuit select able by code option for system clock ? memory ? 2048 16 bit program rom (including 2k 4 bit look-up table) ? 128 4 bit data ram (including 16 working registers) ? 32 4 lcd data ram ? single or dual clock mode ? single (main oscillator only) or dual clock (both main and sub-oscilator) by mask option . ? dual-clock slow operation mode: syst em is operated by the sub-oscillator (f osc = fs and fm is stopped) ? sub-oscillator is only 32.768 khz crystal for dual clock mode. ? main oscillator is crystal or rc oscillation by mask code option . ? main clock : high-frequency clock (400 khz to 4 mhz) or low-frequency clock (32.768 khz) is selected by mask code option. ? 21 input/output pins ? ports for input only: 2 ports/8 pins ? input/output ports: 2 ports/8 pins ? port for output only: 1 port /4 pins (high sink current to drive leds) ? mfp output pin: 1 pin (mfp) ? power-down mode ? hold function: no operation (except for oscillator) ? stop function: no operation ? five types of interrupts ? four internal interrupts (divider 0, divider 1, timer 0, timer 1) ? one external interrupt (port rc) ? lcd driver output ? 32 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 selected ? lcd driver output pins can be used as dc output ports; selectable by code option ? mfp output pin ? output is software selectable as modulating or nonmodulating frequency ? works as frequency output specified by timer 1 ? two built-in 14-bit clock frequency divider circuit (divider 0 and divider 1)
w541e/c261 data sheet - 4 - ? two built-in 8-bit programmable countdown timers ? timer 0: one of two internal clock frequencies (f osc /4 or f osc /1024) can be selected ? timer 1: includes an auto-reload function; and one of three internal clock frequencies (f osc or f osc /64,fs) can be selected or falling edge of pi n rc.0 can be selected (output through mfp pin) ? built-in 18/14-bit watchdog timer selectable for system reset ? powerful instruction set: 120 instructions ? 8-level subroutine (include interrupt) nesting ? up to 1 s instruction cycle (with 4 mhz operating frequency) ? packaged in 80-pin qfp
w541e/c261 data sheet publication release date: june 12, 2007 - 5 - revision a1 3. architecture 3.1 block diagram
w541e/c261 data sheet - 6 - 3.2 pin configuration
w541e/c261 data sheet publication release date: june 12, 2007 - 7 - revision a1 3.3 pad description symbol i/o function xin1 i input pin for oscillator. connected to crystal or resistor to generat e system clock by code option. external 15~20pf capacitor uses to get accurate freq in crystal mode. xout1 o output pin for oscillator connected to crystal or resistor to generate system clock by code option. 20pf capacitor is built in internal for crystal mode. xin2 i input pin for sub-oscillator. connected to a 32.768 khz crystal. external 15~20pf capacitor uses to get accurate freq in crystal mode.. xout2 o oscillator. connected output pin for sub to a 32.768 khz crystal. 20pf capacitor is built in internal for crystal mode. ra0 ? ra3 i/o input/output port. input/output mode spec ified by port mode 1 register (pm1). rb0 ? rb3 i/o input/output port. input/output mode spec ified by port mode 2 register (pm2). rc0 ? rc3 i 4-bit port for input only. each pin has an independent interrupt capability. rd0 ? rd3 i 4-bit port for input only. re0 ? re3 o output port only. this port provides high sink current to drive leds. /int i external interrupt pin with pull-high resistor. this pin is bonding option for the w541c250 body. only for w541e261. mfp o output pin only. this pin can output modulating or nonm odulating frequency, or timer 1 clock output specified by m ode register 1 (mr1). res i system reset pin with pull-high resistor. seg0 ? seg31 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 c an be selected by code option. dh1, dh2 i connection terminals for voltage doubler (halver) capacitor. vdd1, vdd2, vdd3 i positive (+) supply voltage terminal. refer to functional description. vdd i positive power supply (+).
w541e/c261 data sheet - 8 - pad description, continued symbol i/o function vss i negative power supply (-). v pp i voltage control pin for the flash eeprom programming, erasing and verifying. this pin has a built-in pull-low resistor. only for w541e261. mode i mode selection pin for the flash eeprom programming, erasing and verifying. this pin has a built-in pull-low resistor. only for w541e261. data i/o data i/o pin for the flash eeprom programming and verifying. this pin has a built-in pull-low resistor. only for w541e261. 4. absolute maximum ratings parameter rating unit 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: exposure to conditions beyond those listed under absolute ma ximum ratings may adversely affect the life and reliability of the device.
w541e/c261 data sheet publication release date: june 12, 2007 - 9 - revision a1 5. dc characteristics ( v dd ? v ss = 3.0v, fm = 4 mhz, fs = 32.768 khz, t a = 25 c, lcd on, no load; unless otherwise specified ) parameter sym. conditions min. typ. max. unit crystal mode - 0.3 0.6 normal operation rc mode - 1 2 ma operation current iop slow operation - 3.5 8.0 a crystal mode - 135 270 normal operation rc mode - 500 600 hold current ihm slow operation - 2.0 4.0 a stop current ism stop mode - 0.1 1 a (v dd ? v ss = 3.0v, fm = 4 mhz, fs = 32.768 khz, t a = 25 c, lcd on, crystal mode, no load; unless otherwise specified) parameter sym. conditions min. typ. max. unit op. voltage v dd - 2.4 - 5.5 v 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 = 6.0 ma - - 0.4 v mfp output high voltage v mh i oh = 6.0 ma 2.4 - - v port ra, rb output low voltage v abl i ol = 6.0 ma - - 0.4 v port ra, rb output high voltage v abh i oh = 3.0 ma 2.4 - - v lcd supply current i lcd all seg. on - - 6 a seg0 ? seg31 sink current (used as lcd output) i ol1 v ol = 0.4v v lcd = 0.0v 90 - - a seg0 ? seg31 drive current (used as lcd output) i oh1 v oh = 2.4v v lcd = 3.0v 90 - - a segment sink current (used as dc output) i sl v ol = 0.4v v lcd = 0.0v - 4.0 - ma segment drive current (used as dc output) i sh v oh = 2.4v v lcd = 3.0v - 1.5 - ma port re sink current i el v ol = 0.9v 9 13.5 - ma port re source current i eh v oh = 2.4v 1.5 3.0 - ma
w541e/c261 data sheet - 10 - continued parameter sym. conditions min. typ. max. unit port ra/rb sink current i abl v ol = 0.4v 3 6 - ma port ra/rb source current i abh v oh = 2.4v 1.5 3.0 - ma port mfp sink current i ml v ol = 0.4v 3 6 - ma port mfp source current i ml v ol = 2.4v 3 6 - ma input port pull-up resistor r cd port rc, rd 100 350 600 k res pull-up resistor r res - 100 150 200 k int pull-up resistor r int - 100 150 200 k vpp pull-down resistor r vpp v dd = 5v 0.5 1 1.5 m mode pull-down resistor r mode v dd = 5v 0.5 1 1.5 m data pull-down resistor r data v dd = 5v 50 100 150 k 6. ac characteristics (v dd ? v ss = 3.0v, t a = 25 c, unless otherwise specified) parameter sym. conditions min. typ. max . unit rc type - - 4000 crystal type 1 (option low speed type) - 32.768 - op. frequency f osc crystal type 2 (option high speed type) 400 - 4000 khz frequency deviation by voltage drop for rc oscillator f f f(3v) f(2.4v) f(3v) - - 25 % instruction cycle time t i one machine cycle - 4/f osc - s t raw1 dual clock 1 - - reset active width t raw2 single colck 1 - - s interrupt active width t iaw f osc = 32.768 khz 1 - - s
w541e/c261 data sheet publication release date: june 12, 2007 - 11 - revision a1 7. typical application circuit mfp res xout xin dh1 dh2 rc2 rc3 ra0 ra3 output signal rb0 rb1 rb2 com0 com3 rb3 rc0 rc1 seg0 seg31 rd0 rd1 rd2 rd3 lcd panel (1/3 bias 1/4 duty) re0 re1 re2 re3 connect to capacitor and vd d to generate lcd voltage vcc vcc vcc v dd v dd1 v dd2 v dd3 v ss oscout oscin 32.768 khz 0.1 uf 0.1 uf 470 0.1 uf
w541e/c261 data sheet - 12 - 8. package dimension 80-lead qfp 41 40 25 24 65 1 80 2 1 a h d d e b e h e y aa seating plane l l 1 see detail f detail f c 64 0.10 0 12 0 0.004 2.40 1.40 19.10 1.20 18.80 1.00 18.49 0.094 0.055 0.988 0.752 0.047 0.976 0.740 0.039 0.964 0.728 0.80 20.13 14.13 0.25 0.45 2.97 3.30 20.00 14.00 2.85 19.87 13.87 0.10 0.30 2.73 0.10 0.792 0.556 0.010 0.018 0.117 0.130 0.787 0.551 0.112 0.031 0.782 0.546 0.004 0.012 0.107 0.004 symbol min. nom. max. max. nom. min. dimension in inches dimension in mm a b c d e h d h e l y a a l 1 1 2 e 0.014 0.006 0.15 0.35 24.49 24.80 25.10 12 0.025 0.037 0.087 0.103 0.65 0.95 2.21 2.62
w541e/c261 data sheet publication release date: june 12, 2007 - 13 - revision a1 9. version history version date page descrition a1 june 12, 2007 - formal release important notice winbond products are not designed, intended, authorized or warranted for use as components in systems or equipment intended for surgi cal implantation, atomic energy control instruments, airplane or spaceship instrument s, transportation instruments, traffic signal instruments, combustion control instruments, or for other applications intended to support or sustain life. further more, winbond products are not intended for applications wherein failure of winbond products could result or lead to a situation wherein personal injury, death or severe property or environmental damage could occur. winbond customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify winbond for any damages resulting from such improper use or sales.

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