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ICM7243AIM44Z Datasheet(PDF) 8 Page - Intersil Corporation |
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ICM7243AIM44Z Datasheet(HTML) 8 Page - Intersil Corporation |
8 / 17 page 8 FN3162.5 October 2, 2015 Pin Descriptions SYMBOL PIN NUMBER DESCRIPTION ICM7243B 40 Ld PDIP ICM7243A 40 Ld PDIP 44 Ld MQFP VDD 11 39 - D0 to D5 8 to 13 10 to 15 4 to 9 Six-Bit ASCll Data input pins (active high). CS, CS 15, 16 16 10 Chip Select from µP address decoder, etc. WR 17 17 13 WRite pulse input pin (active low). For an active high write pulse, CS can be used, and WR can be used as CS. MODE 31 31 29 Selects data entry MODE. High selects Sequential Access (SA) mode where first entry is displayed in “leftmost” character and subsequent entries appear to the “right”. Low selects the Random Access (RA) mode where data is displayed on the character addressed via A0 - A2 Address pins. A0/SEN 30 30 28 In RA mode it is the LSB of the character Address. In SA mode it is used for cascading devices for displays of more than 8 characters (active high enables device controller). A1/CLeaR 29 29 27 In RA mode this is the second bit of the address. In SA mode, a low input will CLeaR the Serial Address Counter, the Data Memory and the display. A2/DISPlay FULL 28 28 26 In RA mode this is the MSB of the Address. In SA mode, the output goes high after eight entries, indicating DISPlay FULL. OSC/OFF 27 27 25 OSCillator input pin. Adding capacitance to VDD will lower the internal oscillator frequency. An external oscillator can be applied to this pin. A low at this input sets the device into a (shutdown) mode, shutting OFF the display and oscillator but retaining data stored in memory. SEGa - SEGm 2 to 7, 32, 33, 35 to 40 2 to 9, 32, 33, 35 to 40 1 to 3, 30, 31, 33 to 40, 38 to 44 SEGment driver outputs. D.P. 34 34 32 CHARacter 1 to 8 23 to 26, 18 to 21 23 to 26, 18 to 21 24, 19 to 21, 14 to 17 CHARacter driver outputs. VSS 22 22 18 NC N/A N/A 22, 23, 11 No Connect ICM7243 ICM7243 |
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