IZ1225M BASIC FUNCTION 8-DIGITS LCD CALCULATOR WITH TOUCH TONE AND PUNCTUATION FUNCTION The IZ1225M is a single chip CMOS LSI with 8-digit arithmetic operation, single memory, extraction-of-square-root, percentage calculation and auto power off and punctuation and touch tone function, designed for FEM LCD operation with a 1.5V power supply. FUNCTIONS FEATURES • Four standard functions (+, -, ×, ÷ ) • Auto constant calculations (constant: multiplicand, divisor, addend and subtrahend) • Square and reciprocal calculations • Mark-up and mark-down calculations • Extraction of square root • Percentage calculations • Chain multiplication and division • Power calculations • Rough estimate calculations • Touch tone function • Punctuation comma display • Clear key: ON/C, ON/CE, CE • Single chip CMOS construction • Floating decimal point • LCD direct drive • Overflow indication: “E” • Accumulating memory: M+, M-, RM, CM, RM/CM • 48 QFP and bare chip available • Mirror type ABSOLUTE MAXIMUM RATINGS (Ta = 25oC) Symbol Value Unit Note VGG - 0.3 ~ + 3.5 V 1 VIN - 0.3 ~ VGG + 0.3 V Supply Voltage VGG 2.5 ~ 3.5 V Operating Temperature TOPR 0 ~ + 50 o - 55 ~ + 125 o Characteristic Terminal Voltage Storage Temperature Tstg Note: 1. Maximum voltage on any pin with respect to the GND 1 C C IZ1225M ELECTRICAL CHARACTERISTICS (Ta = 25oC, VGG = 3.0V, unless otherwise specified) Characteristic Input Voltage 1 (K2 ~ K6, TI, S2) Input Voltage 2 (S1) Input Current 1 (K2 ~ K6, TI) Input Current 2 (S2) Input Current 3 (S1) Input Current 4 (S1) Output Voltage 1 (P1, P2, A2~A5) Output Voltage 2 (H1 ~ H3, a1 ~ a9, b1 ~ b8, c1 ~ c8) Symbol VIH1 VIL1 VIH2 Min VGG - 0.4 Typ Max 0.4 Unit V VGG - 0.4 VIL2 0.2 IIH1 IIL1 IIH2 IIL2 IIH3 IIL3 IIH4 IIL4 VOH1 VIN = VGG VIN = 0V VIN = VGG VIN = 0V S2=GN VIN = VGG D VIN = 0V S2 = VIN = VGG VGG VIN = 0V without load VOL1 VOA VOB IOUT = 15µA without load without load VOC without load VGG = 1.5V while display is on, VGG = 1.5V, VOL = 0.5V, TI =3V VGG = 1.5V, VOL = 0.5V, TI =3V Display off, VGG = 3V VGG = 1.5V while display is on, 5.5 5 20 10 30 1 10 1 1 1 15 40 1 V µA µA µA µA VGG - 0.15 V Display Frequency Fd Touch Tone (PO) IOL Output Drive Current IOH IOFF (1) Dissipation Test Condition Idis (2) 0.15 2.80 1.30 50 2.95 1.50 1.70 0 0.20 75 V Hz 3 mA -3 0.1 20 30 µA NOTE: 1) Measured by the next test circuit after power supply automatically turns off. 2) Measured by the next test circuit while “0” is being displayed after auto clear operation and while key is not being depressed. OUTPUT WAVEFORM 1; Hi (i = 1, 2, 3) OUTPUT WAVEFORM 2; ai, bi, ci, (i = 1, 2, ... , 8) 2 IZ1225M FUNCTIONAL DESCRIPTION Decimal point system Complete floating decimal point system. Integral number : 8 digits leading zero suppression. Zero shift. Symbols : - : negative number display E : error display M : memory display , : punctuation comma ♪ : touch tone indicator Error detections • System errors occur when: 1) The integral part of any memory calculation result exceeds 8 digits. 2) The division by zero. 3) The extraction of square root of a negative number. • Rough estimate calculation error When the integral part of the result of any standard functions, percentage, square, reciprocal, or power calculations exceed 8 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 8-digit calculation result is indicated together with “E”. The decimal point is indicated in the position corresponding to a calculation result of time 10-8, and no zero shift is performed Error release • System error A system error can be release by the ON/C or ON/CE key. • Rough estimate calculation error A rough estimate calculation error can be released by the ON/C, ON/CE, CE key. A calculation result is not cleared by ON/CE, CE key but is retained. Number entry Numerical can be entered up to 8 digits. Numerical entries equal to 9 digits or more are ignored. 3 IZ1225M Memory protection In any error detection, the memory content is retained. Memory indication If the memory content is not zero, “M” is indicated in the sign-digit position. Doubler key depression The order of the priority when two keys are being depressed simultaneously, is as follows: 5 OFF ON/C = M+ x . . CE + M- +/- ON/CE % 6 4 RM/CM . 9 - 0 1 3 2 CM 7 RM When the OFF and ON/C key are depressed simultaneously, the OFF key is given priority. Key bounce protection Front edge Down to 1 word and up to about 3 words. Trailing edge 9 words 1 word is 3.3ms when display frequency is fd = 100Hz. DISPLAY FONTS • Numericals font Sigh font 0HPRU\ , HUURU PLQXV SXQFWXDWLRQ 4 WRXFKWRQHLQGLFDWRU 8 IZ1225M LCD connector , , , , , . . . . . . . . H2 H3 a9 c8 b8 a8 c7 b7 a7 c6 b6 a6 c5 b5 a5 c4 b4 a4 c3 b3 a3 c2 b2 a2 c1 b1 a1 H1 , , , , , H1 H2 H3 a9 c8 b8a8 c7 b7a7 c6 b6 a6 c5 b5a5 c4 b4a4 c3 b3a3 c2 b2a2 c1 b1a1 AUTO POWER OFF Power automatically turns off after 9 - 11 minutes pass from the last key pressure. (S1 = Low, S2 = High) ON/C KEY All operations except memory content are cleared by ON/C key. TOUCH TONE (♪) KEY • When power is ON, the touch tone function is enable and the beep sound is generated output during 125ms and ♪ sing is displayed on LCD. • Selection of touch tone function is toggled by touch tone key. • Output wave form. ft = 2KHz - VOA - VOC 125 ms MARK-UP AND MARK-DOWN CALCULATION Mark-up and mark-down calculation are performed as follows. ENTRY A ± B % DISPLAY A x B % +OR= A A B A ± AB/100 5 A A B AB/100 AB/100 A+AB/100 OR A --AB/100 IZ1225M APPLICATION CIRCUIT . . . , , , , , . . . . . 13 a1-a5, b1-b4, c1-c4 H1 1 33 µ + a3 c2 b2 a2 c1 b1 a1 H1 VDD 38 39 40 41 42 43 44 45 46 47 PO 01 + TST - VDD D1 b3 c3 a4 b4 c4 a5 b5 c5 a6 b6 c6 a7 b7 37 36 35 34 33 32 31 30 29 28 27 26 25 24 c7 23 a8 22 b8 21 c8 20 a9 19 H2 IZ1225M 18 H3 17 GND 16 VÑ 15 VA 14 VB 3 2 6 K5 K6 P1 P2 ON/C X K4 ON/CE A5 + A3 A2 6 3 9 5 2 M+ M- 8 4 1 +/- RM CM . 7 RCM % 6 A4 CE OFF H2, H3 a6-a9, b5-b8, c5-c8 02 03 04 05 06 07 08 09 10 11 12 13 K4 K6 K 5 P1 P2 A5 A4 A3 A2 K2 K3 TI RP D2 11 K2 0 K3 2 0.1мкФ 0.1мкФ IZ1225M PAD DIAGRAM 130 480 630 780 930 1080 1230 1380 1530 1680 2150 35 34 33 32 1910 29 28 26 36 22 1955 1760 37 21 1785 1610 38 20 1655 1460 39 19 1505 1310 40 18 1355 1160 17 41 1205 1010 42 16 965 860 43 675 44 15 710 525 45 14 435 375 1 13 285 27 25 ( 2280, 22 2150 (0,0) 30 2150 23 130 31 1830 0 1995 I Z1225MR (CHI P) Chip Size:: 2280 x 2280 PAD Size: 100 x 100 Unit: mm 2 3 4 5 130 425 575 725 6 7 8 9 11 10 130 12 875 1025 1185 1345 1495 1645 1795 7 24 2150 IZ1225M PIN DESCRIPTION Pa d 1 Pad Nam PO 2 I/O Description Pad No. 25 Pad Name b7 O Piezo output K4 I Key input 26 3 K6 I Key input 4 K5 I 5 P1 6 I/O Description O Display output a7 O Display output 27 c6 O Display output Key input 28 b6 O Display output O Strobe output 29 a6 O Display output P2 O Strobe output 30 c5 O Display output 7 A5 O Strobe output 31 b5 O Display output 8 A4 O Strobe output 32 a5 O Display output 9 A3 O Strobe output 33 c4 O Display output 10 A2 O Strobe output 34 b4 O Display output 11 K2 I Key input 35 a4 O Display output 12 K3 I Key input 36 c3 O Display output 13 Ti I Test input 37 b3 O Display output 14 VB 38 a3 O Display output 15 VA 39 c2 O Display output 16 VC 40 b2 O Display output 17 GND Ground 41 a2 O Display output 18 H3 O COMMON 3 42 c1 O Display output 19 H2 O COMMON 2 43 b1 O Display output 20 a9 O Display output 44 a1 O Display output 21 c8 O Display output 45 H1 O COMMON 1 22 b8 O Display output 46 VGG 23 a8 O Display output 47 TST 24 c7 O Display output 8 Power supply I Test