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| IZ12291M 10-DIGITS CALCULATOR The IZ12291M is a single chip CMOS LSI with 10-digit arithmetic operation, single memory, extraction-of-square-root, percentage calculation, auto power off and punctuation , designed for FEM LCD operation with a 1.5V power supply. FUNCTIONS * Four standard functions (+, -, x, / ) * Square and reciprocal calculations * Extraction of square root * Auto constant calculations (constant: multiplicand, divisor, addend and subtrahend) * Mark-up and mark-down calculations * Percentage calculations * Chain multiplication and division * Power calculations * Rough estimate calculations * Punctuation comma and touch tone mark display * Clear key: ON/C, CE FEATURES * Single chip CMOS construction * Floating decimal point * LCD direct drive * Overflow indication: "E" * On chip oscillator components * Auto Power off * Accumulating memory: M+, M-, MR, MC, MRC * Bare chip is available Mirror type LCD CONNECTION 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 a9 b9 c9 a10 b10 c10 a11 H3 H2 o ABSOLUTE MAXIMUM RATINGS ( Ta = 25 C ) Characteristic Symbol Value - 0.3 ~ + 2.1 - 0.3 ~ VCC + 0.3 0 ~ + 50 - 55 ~ + 125 Unit V V o C o C Terminal Voltage Operating Temperature Storage Temperature VCC VIN Ta Tstg o ELECTRICAL CHARACTERISTICS (Ta = 25 C, VCC = 1.5V, unless otherwise specified) Characteristic Symbol Test Condition Min Typ Max Unit Operating Voltage Input Voltage (pins FDISB, EXT) Input Current 1 (pins FDISB, EXT) Input Current 2 VOP VIH VIL IIH1 IIL1 IIH2 VIN = VCC VIN = 0V VIN = VCC; APODISB = 0V 1.1 VCC - 0.4 0.4 1 3 1 A A 1.5 1.8 V V 1.5 2.5 1 IZ12291M Characteristic (pins K4 / K6) Output Voltage (pins a1/a11, b1/b10, c1/c10, H1/H3) Display Frequency Supply Current Symbol IIL2 VOA VOB VOC Fd IOFF IDIS Test Condition VIN = 0V; FDISB = 0V Without load Without load Without load VCC = 1.3V, Display is on Display is off VCC = 1.3V, Ddisplay is on Min 3 2.80 1.30 Typ 5.5 2.95 1.50 0 75 Max 7.5 1.70 0.20 Hz 1 10 A V Unit 55 6 FUNCTIONAL DESCRIPTION Decimal point system Complete floating decimal point system. Integral number 10 digits leading zero suppression. Zero shift. Symbols - : negative number display E : error display , : punctuation comma Error detections * System errors occur when: 1) The division by zero. 2) The extraction of square root of a negative number. 3) The integral part of any memory calculation result exceeds 10 digits. * Rough estimate calculation error occur when The integral part of any calculation - any standard functions, percentage, square root, reciprocal or power calculations result exceeds 10 digits. Error indication * System error "0" is indicated in the 1-digit position and "E" in the sign-digit position. * Rough estimate calculation error The high-order 10-digit calculation result is indicated together with "E". -10 The decimal point is indicated if the position corresponding to a calculation result of time 10 , and no zero shift is performed Error release * System error A system error can be release by the ON/C key. * Rough estimate calculation error ON/C key can release a rough estimate-calculation error and clear calculation result at once. CE key can release only a rough estimate calculation error ("E" flag). Number entry Numericals can be entered up to 10 digits. Numerical entries equal to 11 digits or more are ignored. 2 IZ12291M Memory protection In any error detection, the memory contents present before the error detection are protected. Memory indication If the memory content is not zero, "M" is indicated in the sign-digit position. Key bounce protection Front edge Minimum 3 words Trailing edge Minimum 16 words 1 word is 3.3ms when display frequency is Fd = 100Hz. Auto power OFF Power automatically turns off after 7 - 8 minutes pass from the last key pressure. By connecting the APODISB pin to GND or VCC, the auto power off function is disabled or enabled, respectively. , , 8c 9 a9 b Mirror LCD with IZ12291M CLEAR KEY DESCRIPTION ON/C key * Power-on function. * All operations are cleared by the ON/C key (except memory contents). CE key * CE key can edit the last operand or operator. MARK-UP AND MARK-DOWN CALCULATION ENTRY A +/B % A x B % + OR = A A B A AM/100 DISPLAY A A B AM/100 AM/100 A + AM/100 OR A - AM/100 Note: AM: AMOUNT 3 2H 3H 1H 2H 3H 01c 01 a01 b 9c 7c 8 a8 b , 6c 7 a7 b , 5c 6 a6 b , 4c 5 a5 b , 3c 4 a4 b , 2c 3 a3 b 1c 2 a2 b 1 a1 b 01c 01b 01a 9c 9b 9a 8c 8b 8a 4K EC = RM . . 0 3 2 1 5K % CRM -M x . 6 5 4 6K F FO -/ + CM +M + - 9 8 7 C/NO ccV 1a 1b DF 6K 5K 4K C/NO TXE BV F 1. 0 F 1. 0 AV CV DNG 2H 3H )PIHC( M19221ZI 0 1c 01b 01a 9c 9b 9a 8c 8b 8a 7c 0 1c~ 8c , 0 1b~ 8 b , 1 1a ~8 a 9 3H ,2H 2 APPLICATION CIRCUIT (mirror LCD) IZ12291M F 33 + - V5. 1 BS cc V OPA 1 H 1c 2a 2b 2c 3a 3b 3c 4a 4b 4c 5a 5b 7b 7a 6c 6b 6a 5c 7c~ 1 c , 7 b~ 1b , 7a~ 1 a 12 NOTE1: SB: Solar Battery APODISB APO STATE 4 VCC ENABLE AUTO POWER OFF CONDITION GND DISABLE 1H IZ12291M PAD DIAGRAM IZ12291M PAD LOCATION Pad No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pad Name EXT FD K6 K5 K4 ON/C VCC VOP VSB APO H1 a1 b1 c1 a2 b2 Description External Clock FOSC Disable Key input Key input Key input Key Input Power Supply Solar battery Option Pin APO Disable COM1 Display output Display output Display output Display output Display output Pad No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Pad Name c2 a3 b3 c3 a4 b4 c4 a5 b5 c5 a6 b6 c6 a7 b7 c7 Description Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Display output Pad No. 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 Pad Name a8 b8 c8 a9 b9 c9 a10 b10 c10 H3 H2 GND VC VA VB Description Display output Display output Display output Display output Display output Display output Display output Display output Display output COM3 COM2 Ground Capacitor terminal Capacitor terminal Capacitor terminal APO: Output Power OFF 5 |
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