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ICM7211AM Arkusz danych(PDF) 4 Page - Intersil Corporation |
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ICM7211AM Arkusz danych(HTML) 4 Page - Intersil Corporation |
4 / 7 page 4 FN3158.5 November 16, 2004 OSC 36 Floating or with External Capacitor to VDD Oscillator Input VSS Disables BP output devices, allowing segments to be synchronized to an external signal input at the BP terminal (Pin 5). Interface Input Configuration INPUT DESCRIPTION DIP TERMINAL CONDITIONS FUNCTION DA1 Digit Address Bit 1 (LSB) 31 VDD = Logical One VSS = Logical Zero DA1 and DA2 serve as a 2-bit Digit Address Input DA2, DA1 = 00 selects D4 DA2, DA1 = 01 selects D3 DA2, DA1 = 10 selects D2 DA2, DA1 = 11 selects D1 DA2 Digit Address Bit 2 (MSB) 32 VDD = Logical One VSS = Logical Zero CS1 Chip Select 1 33 VDD = Inactive VSS = Active When both CS1 and CS2 are taken low, the data at the Data and Digit Select code inputs are written into the input latches. On the rising edge of either Chip Select, the data is decoded and written into the output latches. CS2 Chip Select 2 34 VDD = Inactive VSS = Active Input Definitions In this table, VDD and VSS are considered to be normal operating input logic levels. Actual input low and high levels are specified under Operating Characteristics. For lowest power consumption, input signals should swing over the full supply. (Continued) INPUT DIP TERMINAL CONDITIONS FUNCTION Timing Diagram FIGURE 1. MICROPROCESSOR INTERFACE INPUT CS1 (CS2) CS2 (CS1) DATA AND DIGIT ADDRESS = DON’T CARE tDH tDS tWI tICS Typical Performance Curves FIGURE 2. OPERATING SUPPLY CURRENT AS A FUNCTION OF SUPPLY VOLTAGE FIGURE 3. BACKPLANE FREQUENCY AS A FUNCTION OF SUPPLY VOLTAGE VSUPP (V) 4 12 3 6 7 5 30 25 20 15 10 5 DISPLAY BLANK, PIN 36 OPEN TA = -20°C TA = 70°C TA = 25°C VSUPP (V) 4 12 3 6 5 180 150 120 90 60 30 TA = 25°C 0 COSC = 220pF COSC = 22pF COSC = 0pF (PIN 36 OPEN) ICM7211AM ICM7211AM |
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