A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 802 / 812
6.17. Keypad
6.17.1. Overview
The keypad interface is used to connect external keypad devices. It can provide up to 8 rows and 8
columns. Key press or key release can be detected to the CPU by an interrupt. To prevent the
switching noises, internal debouncing filter is provided.
It features:
Support industry-standard AMBA Peripheral Bus (APB) and is fully compliant with the AMBA
Specification, Revision 2.0.
Interrupt for key press or key release
Internal debouncing filter to prevent the switching noises
To Next Page
Loading...