AN980 Datasheet, PDF (1/8 Pages) STMicroelectronics – ST7 KEYPAD DECODING TECHNIQUES

AN980
APPLICATION NOTE
ST7 KEYPAD DECODING TECHNIQUES,
IMPLEMENTING WAKE-UP ON KEYSTROKE
by 8-Bit Micro Application Laboratory
INTRODUCTION
The goal of this application note is to present an example of the use of the HALT mode.
In this application, the MCU (here a ST72F264) is waked up by an external interrupt caused by
someone pressed a key on the 4x4 matrixed keypad.
AN980/0802
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