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Category: Digital Circuits / Display Circuits Views: 732 Rank: 0 The circuit in Figure 1 uses a PIC16C55 µP to read 10-bit binary data and directly display the data in decimal format on three common-cathode LED displays. If value of the data exceeds 999, the displays show three hyphens (---) to represent overflow. The PIC16C55 has high drive capability. Each output pin can source 20 mA and sink 25 mA; the outputs can thus directly drive the LED display.The output pins multiplex the display, turning only one digit on at a time for approximately 5 msec. The 10-bit data arrives on pins RA0 to RA3, RB0 to RB4, and RC0. The assembly program in Listing 1 arranges the input data, converts it to three BCD codes visit page. The output pins multiplex the display, turning only one digit on at a time for approximately 5 msec. The 10-bit data arrives on pins RA0 to RA3, RB0 to RB4, and RC0. The assembly program in Listing 1 arranges the input data, converts it to three BCD codes http://www.edn.com/archives/1996/110796/23DI_07.htm
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