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1 * this specification are subject to be changed without notice. EM34001 8-digit calculator 1.26.1995 EM34001 8-digit calculator general description the EM34001 is a single-chip lsi cmos calculator with 8-digit four function arithmetic operations,single memory, extraction of square root and percentage calculation functions, leading zero and trailing zero suppression, chain calculations and internal debuncing and encoding of keyboard inputs. it is designed for lcd operation with 1.5v power supply (either from solar cell or battery), auto-power off, low power dissipation and single power supply making the EM34001 ideal for hand held calculators with low system cost. features ? number of digits - 8 digits (rough estimated calculation is possible). ? calculations : - standard four functions (+ , - , x , ? ). - chain multiplication and division. - auto-constant calculation (constant multiplicand, divisor, addend and subtrahend). - square and reciprocal calculations. - mark-up and mark-down calculations. - extraction of square root. - percentage calculations. - power calaulations. - rough estimate calculations. - memory calculations. ? decimal point system- complete floating decimal point system. ? display format : 8 digits + sign (- , e & m) leading zero suppression zero shift. ? negative number indication : number + minus (-) sign. ? auto power off ability.
* this specification are subject to be changed without notice. EM34001 8-digit calculator 2 1.26.1995 pin descriptions symbol i/o function vso i voltage limiter option pad apo i auto power-off option pad v dd positive power supply h1 o o/p signal to lcd (common) a1 o o/p signal to lcd (segment) b1 o o/p signal to lcd (segment) c1 o o/p signal to lcd (segment) a2 o o/p signal to lcd (segment) b2 o o/p signal to lcd (segment) c2 o o/p signal to lcd (segment) a3 o o/p signal to lcd (segment) b3 o o/p signal to lcd (segment) c3 o o/p signal to lcd (segment) a4 o o/p signal to lcd (segment) b4 o o/p signal to lcd (segment) c4 o o/p signal to lcd (segment) a5 o o/p signal to lcd (segment) b5 o o/p signal to lcd (segment) c5 o o/p signal to lcd (segment) a6 o o/p signal to lcd (segment) b6 o o/p signal to lcd (segment) c6 o o/p signal to lcd (segment) a7 o o/p signal to lcd (segment) b7 o o/p signal to lcd (segment) c7 o o/p signal to lcd (segment) a8 o o/p signal to lcd (segment) b8 o o/p signal to lcd (segment) c8 o o/p signal to lcd (segment) h2 o o/p signal to lcd (common) h3 o o/p signal to lcd (common) v ss negative power supply v ee connected as voltage doubler va connected as voltage doubler vb connected as voltage doubler cg oscillator o/p k3 i key i/p signal k2 i key i/p signal a2 o o/p strobe signal to key
3 * this specification are subject to be changed without notice. EM34001 8-digit calculator 1.26.1995 a3 o o/p strobe signal to key a4 o o/p strobe signal to key a5 o o/p strobe signal to key p2 o o/p strobe signal to key p1 o o/p strobe signal to key k5 i key i/p signal k6 i key i/p signal k4 i key i/p signal symbol i/o function function descriptions a). lcd display display format numericals font h3 b8 c7 b6 c5 a5 b4 c3 a3 b2 c1 a1 h2 c8 a8 b7 c6 b5 c4 a4 b3 c2 a2 b1 h1 a8 b8 c8 a7 b7 c7 a6 b6 c6 a5 b5 c5 a4 b4 c4 a3 b3 c3 a2 b2 c2 a1 b1 c1 h1 h2 h3 common electrode side sign font lcd connection lcd driving system 1/2 bias, 1/3 duty display configuration segment electrode side memory loading error minus
* this specification are subject to be changed without notice. EM34001 8-digit calculator 4 1.26.1995 display example v2 v1 v0 v2 v1 v0 v2 v1 v0 v2 v1 v0 v2 v1 v0 v2 v1 v0 v2 v1 v0 v2 v1 v0 v2 v1 v0 v2 v1 v0 v2 v1 v0 v2 v1 v0 v2 v1 v0 v2 v1 v0 t1 t2 t3 t4 t5 t6 t1 t2 t3 t4 t5 t6 h3 h2 h1 ai bi ci "off" ai.bi.ci "on" no. "8" on or off waveform no. "5" on or off waveform h3 h2 h1 ai bi ci "off" ai.bi.ci "on" c a b c a b (h1 h2 h3) (h1 h2 h3) (h1 h2 h3) 0 0 0 1 1 1 1 0 1 (h1 h2 h3) (h1 h2 h3) (h1 h2 h3) 0 1 0 1 1 1 1 1 1
5 * this specification are subject to be changed without notice. EM34001 8-digit calculator 1.26.1995 b). keyboard descriptions a) equal key (=) i) performs keyed-in operation and maintains that operation for possible use. ii) establishes power/reciprocation calculation. b) multiplication key (x) i) enters multiplicand. ii) performs previous operation and displays result. c) division key ( ? ) i) enters dividend. ii) performs previous operation and displays result. d) addition key (+) i) conditions machine for an addition. ii) performs previous operation and displays result. e) subtraction key (-) i) conditions machine for a subtraction. ii) performs previous operation and displays result. f) percent key (%) the purpose of the percent key is to allow for calculation of add-on and discount. deter mination of add- on requires the principal amount to be the first entry followed by the "+" or "x" key, with the percentage being the second entry. depression of the percent key yields the amount to add on, such as tax or interest. depression of the "=" key adds this amount to the principal. g) change sign key (+/-) pushing the "+/-" key twice in succession causes the corresponding sign to appear and disappear. during digit entry, this function changes the sign of the entered factor. h) power on/all clear key (on/ac) i) first push power-on displays "0". ii) in the middle of a digit entry, a second push will clear all registers and memory. i) clear entry/clear key (ce/c) i) during the digit entry, the first depression will clear the entry register. and display the previous enter number again. ii) the second push will clear all registers except memory. j) clear entry key (ce) during the digit entry will clear the entry register and display number "0". k) square root key ( ) extracts the square root of a positive number displayed in the entry register. l) memory plus key (m+) i) adds the current display to the contents of memory.
* this specification are subject to be changed without notice. EM34001 8-digit calculator 6 1.26.1995 ii) it will terminate a number entry. m) memory minus key (m-) i) subtracts the current display from the contents of memory ii) it will terminate a number entry. n) memory recall and clear key (rcm) i) first push, as rm key, transfers the contents of the memory register into the display register. ii) second push, as cm key, clears the memory. o) number, decimal key ("0 - 9", "?") the first number key in a sequence will clear the display and enter the digit in the display. successive entries will shift the display left and enters the data in display register. the first decimal point entered is effective. an attempted entry of more than 8 digits or 7 decimal places will be ignored. c). error conditions a). error detection system errors occur when : i) the integral part of any calculation result exceeds 16 digits. ii) the integral part of any memory calculation result exceeds 8-digit or when the integral part of any addend or subtrahend to memory exceeds 8-digit. iii) the integral part of a mark-up and mark-down calculation result exceeds 8-digit. iv) a division by zero is attempted. v) an extraction of the square root of a negative number is attempted. rough estimate calculation results occur when : the integral part of the result of any one of the standard four functions, percentage, square,reciprocal, and power calculations exceeds 8-digit and is equal to 16-digit or less. b). error indication i) system error : "0" is indicated in the first-digit position and "e" in the sign-digit position. ii) rough estimate calculation result : the high-order 8-digit of a calculation result is indicated together with "e". the location of the decimal point corresponds to the result of calculation times le-8, and no zero shift is performed. c). error release i) system error : a system error can be released by depressing on/ac key. ii) rough estimate calculation result : a rough estimate calculation error can be released by depressing the on/ac or ce/c key. however the calculation result is not cleared by ce/c key but is retained. d). operation characteristics
7 * this specification are subject to be changed without notice. EM34001 8-digit calculator 1.26.1995 a) constant operation the EM34001 has implied constant mode on +, -, x, ? , &, % operations. the constant is performed automatically by the "=" key, "%" key, or "%" key without a constant for addition, subtraction and division while the first operand is the constant for multiplication. b) number entry numbericals can be entered up to 8-digit. entries equal to 9-digit or more are ignored. c) memory protection in any error detection, the memory contents present before the error detection are protected. d) memory indication if the memory contents are a number other than zero, "m" is indicated in the sign-digit position. e) auto power off if no key is depressed for a specific period of time, the power supply will automatically turn off. this time interval up to power-off is 131,072 words (approximately equal to 14 minutes and 24 seconds at fd= 52 hz, the display time of a word being equal to 6 ms when fd= 52 hz). f) double key depression the order of priority, when two keys are depressed simultaneously is as follows : g) key bounce protection - font edge : down to 1 word and up to about 3 words. - back edge : 14 words. e). arithmetic operations off -> on/ac -> ce/c -> 5 -> 6 -> 4 -> rom -> ? -> 9 x <- ? <- ? <- 0 <- 1 <- 3 <- 2 <- cm <- 7 <- 8 <- - m+ -> = -> +/- -> ce -> + -> m- -> % -> rm > < 3v 1.5v 0v ? 1/fd ? (3 word cycles) output waveform example
* this specification are subject to be changed without notice. EM34001 8-digit calculator 8 1.26.1995 1 2345678 90 ab ab ab ab a ? a +/- ? on/ac a b ? ab ab ab ab ab kb c ak c kb c ak c ak b ak b + = - = x = ? = x = x % + = x % - = ? % + % - % x= = ? = = x % % ? % % + = = - = = key operation display 12345678. ab ab a b ab a 0e 0 b kb c a/k c/k k b/100 c/100 100 a/k ak b + k ak b + - ? a b/100 + - ? ? a b ? (ab/100) a+ (ab/100) a- 100 a/b k k 100 c/k - k entry four fundamental arithmetic calculations square root calculations percent calculations constant calculations a + (a b/100) a - (a b/100) a b/100
9 * this specification are subject to be changed without notice. EM34001 8-digit calculator 1.26.1995 a b ab ab ab + = - = x = ? key operation repeated calculations power calculations mixed calculations at | (a + b) ?c/d) ?e|>10 memory calculations = = = = = a a a x x = x = = = a = ? = ? = ab e + x ce/c x = cd ? = a b rm cm ab c m+ + m+ rm ce/c m - d x m+ e m+ rm ((a+b)?/d) ? e/10 e display a2b a2b (a/b)/b (a?)? + - 1/a (a+b) ? c/d a m a - b m a+b+c ?d m c a 2 a 4 a 3 1/a 2 8 ((a+b)?/d) ? e/10 8 b m a - b a + b m d m 0 m e 0 m a+b+c ?d m a+b+c ?d a+b+c ?d a+b+c ?d a+b+c ?d a+b+c ?d a + b 0 a - b a - b a memory 8 at | a + b + c ?d + e|>10 8
* this specification are subject to be changed without notice. EM34001 8-digit calculator 10 1.26.1995 electrical characteristics (v dd =1.5v, t a =25 c, unless otherwise specified) parameter sym. min. typ. max. unit condition supply voltage v dd 1.1 1.3 1.8 v input voltage v il - - 0.4 v note 1 v ih v dd -0.4 - - v note 1 input current i ih 0.3 1 3 m av in =v dd , note 1 i il --1 m av in =0v, note 1 output voltage v oh v dd -0.15 - - v no load, note 2 v ol - - 0.15 v i out =15 m a, note 2 v oa 2.8 3 v note 3 v ob 1.3 1.5 1.7 v note 3 v oc - 0 0.2 v note 3 display frequency fd 50 65 - hz v dd =1.3v while display is on dissipation current i dd 0.1 m a display is off, note 4 v dd1 - 2.5 3.5 m av dd =1.3v , note 5 while display is on absolute maximum ratings items sym. min. max. unit supply voltage v dd -v ss -0.3 2.0 v input voltage vin -0.3 v dd +0.3 v operating temperature top 0 +50 c storage temperature tstg -20 +70 c note : 1. applies to terminals k2 - k6 2. applies to terminals p1 , p2 and a2 - a5 3. applies to terminals hi(i=1 - 3),ai,bi and ci(i=1 - 8) 4. measured by the following test circuit after power supply automatically turns off. . 5. measured by the above test circuit while "0" is being dis played after auto-clear and while no key is being depressed. v v vb va hm3401a/b - + v m a dd ee dd v ss i dd test circuit EM34001
11 * this specification are subject to be changed without notice. EM34001 8-digit calculator 1.26.1995 applications circuits a). solar powered calculator 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 1 2 3 4 5 6 7 8 9 10 11 12 23 13 14 15 16 17 18 19 20 21 22 hm3401a/b cg k3 k2 a2 a3 a4 a5 p2 p1 k5 k6 k4 apo vso h1 a1 b1 c1 a2 b2 c2 a3 b3 c3 a4 b4 c4 a5 b5 c5 a6 b6 c6 a7 b7 c7 a8 b8 c8 h2 h3 va vb v ee v dd c2 on/ ac off ce/ c x m+ +/- = + ce m- rm % _ 9 8 cm 7 6 5 4 . rcm 3 2 1 ? 0 c1=c2=0.1 m f 20% c1 can be neglected d1 : led for constant voltage control r1: 1.8k ohm + - r1 d1 sb po enable po disable lh ? v ss v dd c1 EM34001
* this specification are subject to be changed without notice. EM34001 8-digit calculator 12 1.26.1995 b). battery powered calculator 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 1 2 3 4 5 6 7 8 9 10 11 12 23 13 14 15 16 17 18 19 20 21 22 hm3401a/b cg k3 k2 a2 a3 a4 a5 p2 p1 k5 k6 k4 apo vso h1 a1 b1 c1 a2 b2 c2 a3 b3 c3 a4 b4 c4 a5 b5 c5 a6 b6 c6 a7 b7 c7 a8 b8 c8 h2 h3 gnd va vb v ee v dd c2 on/ ac off ce/ c x m+ +/- = + ce m- rm % - 9 8 cm 7 6 5 4 . rcm 3 2 1 ? 0 c1=c2=0.1 m f 20% c1 can be neglected 1.5v ? apo enable apo disable lh v dd c1 EM34001
13 * this specification are subject to be changed without notice. EM34001 8-digit calculator 1.26.1995 pad diagram 35 36 37 38 39 40 41 42 43 44 45 46 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 (0,0) y x EM34001 vb va v ss h3 h2 c8 b8 c7 b7 a7 c6 b6 a6 c5 b5 a5 c4 b4 a4 b3 a3 c3 c2 b2 a2 c1 b1 a1 h1 v dd apo vso cg k3 k2 a2 a3 a4 a5 p2 p1 k5 k6 k4 a8 v ee pad no. symbol x y 1 vso -690.0 -769.0 2 apo -552.0 -769.0 3v dd -414.0 -769.0 4 h1 -276.0 -769.0 5 a1 -138.0 -769.0 6 b1 0.0 -769.0 7 c1 138.0 -769.0 8 a2 276.0 -769.0 9 b2 414.0 -769.0 10 c2 552.0 -769.0 11 a3 690.0 -769.0 12 b3 834.2 -756.6 13 c3 834.2 -618.6 14 a4 834.2 -480.6 15 b4 834.2 -342.6 16 c4 834.2 -204.6 17 s5 834.2 -66.6 18 b5 834.2 71.4 19 c5 834.2 209.4 20 a6 834.2 347.4 21 b6 834.2 485.4 22 c6 834.2 623.4 23 a7 833.4 768.8
* this specification are subject to be changed without notice. EM34001 8-digit calculator 14 1.26.1995 pad no. symbol x y 24 b7 695.4 768.8 25 c7 557.4 768.8 26 a8 417.3 768.8 27 b8 279.3 768.8 28 c8 141.3 768.8 29 h2 3.3 768.8 30 h3 -134.7 768.8 31 v ss -272.7 768.8 32 v ee -410.7 768.8 33 va -556.2 768.8 34 vb -694.2 768.8 35 cg -834.0 749.0 36 k3 -834.0 611.0 37 k2 -834.0 473.0 38 a2 -834.0 335.0 39 a3 -834.0 197.0 40 a4 -834.0 59.0 41 a5 -834.0 -79.0 42 p2 -834.0 -217.0 43 p1 -834.0 -355.0 44 k5 -834.0 -493.0 45 k6 -834.0 -631.0 46 k4 -834.0 -769.0 chip size : 1960x 1830 m m

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