The aim of this application note is to show h ow to scan the 4x4 matrix keypad multiplexed wit h a four 7-segment display. The software attach ed to this application note scans the pressed ke y and displays it on the multiplexed 7-segment L EDs. This application note makes obvious Inter rupt capability of the STR710 device to offer a b etter key scan.

STR71x GPIO Scanning a 4x4 Matrix Keypad(1799 AN)
.................................................\71x_conf.h
.................................................\71x_it.c
.................................................\include
.................................................\.......\71x_it.h
.................................................\.......\71x_lib.h
.................................................\.......\71x_map.h
.................................................\.......\71x_type.h
.................................................\.......\eic.h
.................................................\.......\gpio.h
.................................................\.......\pcu.h
.................................................\.......\rccu.h
.................................................\.......\tim.h
.................................................\.......\xti.h
.................................................\main.c
.................................................\readme.txt
.................................................\realview
.................................................\........\GPIO.DDB
.................................................\........\GPIO.prj
.................................................\scat.scf
.................................................\source
.................................................\......\71x_init.s
.................................................\......\71x_lib.c
.................................................\......\71x_vect.s
.................................................\......\eic.c
.................................................\......\gpio.c
.................................................\......\pcu.c
.................................................\......\rccu.c
.................................................\......\retarget.c
.................................................\......\tim.c
.................................................\......\xti.c
.................................................\version.txt

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