Texas Instruments

Description

Table of Contents. 1 Introduction .3. 1.1 Interface Architectural Scheme . The aim of this application note is to show how to scan the 4x4 matrix keypad multiplexed with a four 7-segment display. The software attached to this application 6-0. 11. 4-LINE BCD TO. MICROPROCESSOR. ADM809. GND. VCC. VCC. RESET. OTHER SENSING. DEVICES. PRIORITY ENCODER. 74LS147 . 03. 736. -01. OTHER SENSING. DEVICES. PRIORITY ENCODER. 74LS147 . 0009. 0-0. 11. Figure 11. Interfacing to Microprocessors with Multiple Interrupts. ADM809-5L/. OTHER SENSING. DEVICES. PRIORITY ENCODER. 74LS147 . 4-LINE BCD TO. MICROPROCESSOR. Figure 1. Interfacing to Microprocessors with Multiple.