ICM7232 Intersil Corporation, ICM7232 Datasheet
ICM7232
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ICM7232 Summary of contents
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... ICM7231 Drives 8 Digits of 7 Segments with Two Independent Annunciators Per Digit Address and Data Input in Parallel Format • ICM7232 Drives 10 Digits of 7 Segments with Two Independent Annunciators Per Digit Address and Data Input in Serial Format • All Signals Required to Drive Rows and Columns of Triplexed LCD Display are Provided • ...
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... DATA CLOCK ICM7231, ICM7232 DATA CLOCK INPUT DISP 38 A1 BP1 37 A0 BP2 36 V BP3 BD3 BD2 ...
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... OUTPUT LATCHES 9 WIDE DATA DECODER DATA INPUT EN LATCHES AN2 BD1 BD3 AN1 BD0 BD2 DATA INPUTS NOTE: See Figure 13 for display segment connections. ICM7231, ICM7232 ICM7231 DIGIT EN ADDRESS DECODER ONE SHOT ADDRESS EN INPUT LATCHES ...
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... DATA DECODER AN1 AN2 BD0 BD1 BD2 BD3 SHIFT REGISTER SHIFTS RIGHT TO LEFT ON RISING EDGE OF DATA CLOCK NOTE: See Figures 13 and 14 for display segment connections. ICM7231, ICM7232 (Continued) ICM7232 DIGIT EN ADDRESS DECODER SERIAL INPUT CONTOL LOGIC ...
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... DISP 2V, Current from On-Chip DISP DD DISP One of Three Identical Resistors in String (Sample Test Only) See Figure 5 ICM7231, Pins 39, 1 ICM7232, Pins 1, 38, 39 (Note 2) Pin 37, ICM7232 1mA 4.5V -500 Industrial Range 0V, - TEST CONDITIONS ...
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... When DATA ACCEPTED Output is HIGH, positive going edge of WRITE triggers reset only. Positive going edge advances data in shift register. ICM7232: Elev- enth edge resets shift register and control logic. Output LOW when correct number of bits entered into shift register. ...
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... DATA ACCEPTED OUTPUT t WLL t WP WRITE INPUT RESETS SHIFT REGISTER AND INPUT CONTROL LOGIC WHEN DATA ACCEPTED HIGH FIGURE 2. ICM7232 ONE DIGIT INPUT TIMING DIAGRAM, WRITING BOTH ANNUNCIATORS ICM7231, ICM7232 ICS xxxxxxxxxxx xxxxxxxxxxx ADDRESS xxxxxxxxxxx xxxxxxxxxxx AND DATA xxxxxxxxxxx INPUTS VALID ...
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... RESETS SHIFT REGISTER AND INPUT CONTROL LOGIC WHEN DATA ACCEPTED HIGH FIGURE 3. ICM7232 INPUT TIMING DIAGRAM, LEAVING BOTH ANNUNCIATORS OFF ICM7231 Family Description The ICM7231 drives displays with 8 seven-segment digits with two independent annunciators per digit, accepting six data bits and three digit address bits from parallel inputs controlled by a chip select input ...
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... RMS ON voltage is always 1.92V PEAK 1 For a / multiplexed LCD, the ratio of RMS ON to OFF 3 voltages is fixed at 1.92, achieving adequate display contrast with this ratio of applied RMS voltage makes some demands on the liquid crystal material used. ICM7231, ICM7232 V DD BP1 BP2 ...
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... APPLIED VOLTAGE (V FIGURE 8. CONTRAST vs APPLIED RMS VOLTAGE All members of the ICM7231 and ICM7232 family use an internal resistor string of three equal value resistors to generate the volt- ages used to drive the display. One end of the string is connected on the chip to V and the other end (user input) is available at ...
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... Chip Select pulses; this is to allow suf- ficient time for the on-chip enable pulse to decay, and ensures that new data doesn’t appear at the decoder inputs before the decoded data is written to the outputs. Serial Input Of Data And Address (ICM7232 ...
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... DATA ACCEPTED to return high, and leaving the chip ready to accept data for the next digit/character. Note that for the ICM7232 the eleventh clock resets the shift register and control logic, but the DATA ACCEPTED Output goes low after the eighth clock. This allows the user to ...
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... DISPLAY OUTPUT DIGIT SELECTED D1 SEGMENT LINE CONNECTIONS BP1 D5 BP2 D6 D7 BP3 D8 D9 D10 FIGURE 13. ICM7231 AND ICM7232 DISPLAY FONTS (“A” AND “B” SUFFIX VERSIONS NONE ) NONE NONE (NOTE 1) NONE NONE NONE BP1 ICM7231C an ICM7232C BP2 an2 ANNUNCIATOR BP1 ...
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... FUNCTION INPUT NOTE: The annunciators show function and the decimal points indicate the range of the current operation. the system can be efficiently battery operated. FIGURE 15. 10MHz FREQUENCY/PERIOD POINTER WITH LCD DISPLAY ICM7231, ICM7232 INTERVAL UNIT TEST FREQ. RATIO BD0 - 3 AN2 ...
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... FIGURE 16. “FORWARD” PIN ORIENTATION AND DISPLAY CONNECTIONS D10 D9 D8 SELECT NO FORWARD PCB TRACES UNDER PACKAGE FIGURE 17. “REVERSE” PIN ORIENTATION AND DISPLAY CONNECTIONS ICM7231, ICM7232 TOP VIEW ...
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... For information regarding Intersil Corporation and its products, see web site http://www.intersil.com Sales Office Headquarters NORTH AMERICA Intersil Corporation P. O. Box 883, Mail Stop 53-204 Melbourne, FL 32902 TEL: (407) 724-7000 FAX: (407) 724-7240 ICM7231, ICM7232 EUROPE Intersil SA Mercure Center 100, Rue de la Fusee 1130 Brussels, Belgium TEL: (32) 2.724.2111 FAX: (32) 2.724.22.05 ...