A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 231 / 812
1.19. Port Controller
1.19.1. Port Description
The chip has several ports for multi-functional input/out pins. They are shown below:
Port A(PA): 18 input/output port
Port B(PB): 24 input/output port
Port C(PC): 25 input/output port
Port D(PD): 28 input/output port
Port E(PE) : 12 input/output port
Port F(PF) : 6 input/output port
Port G(PG) : 12 input/output port
Port H(PH) : 28 input/output port
Port I(PI) : 22 input/output port
For various system configurations, these ports can be easily configured by software. All these ports
can be configured as GPIO if multiplexed functions not used. 32 external PIO interrupt sources are
supported and interrupt mode can be configured by software.
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