Texas Instruments RM46L852, Manual

Page: 137 / 173

PRODUCTPREVIEW
RM46L852
www.ti.com SPNS185 – SEPTEMBER 2012
5.5 General-Purpose Input/Output
The GPIO module on this device supports two ports, GIOA and GIOB. The I/O pins are bidirectional and
bit-programmable. Both GIOA and GIOB support external interrupt capability.
5.5.1 Features
The GPIO module has the following features:
• Each IO pin can be configured as:
–
Input
– Output
– Open Drain
• The interrupts have the following characteristics:
–
Programmable interrupt detection either on both edges or on a single edge (set in GIOINTDET)
– Programmable edge-detection polarity, either rising or falling edge (set in GIOPOL register)
– Individual interrupt flags (set in GIOFLG register)
– Individual interrupt enables, set and cleared through GIOENASET and GIOENACLR registers
respectively
– Programmable interrupt priority, set through GIOLVLSET and GIOLVLCLR registers
• Internal pullup/pulldown allows unused I/O pins to be left unconnected
For information on input and output timings see Section 3.8 and Section 3.9
Copyright © 2012, Texas Instruments Incorporated
Peripheral Information and Electrical Specifications 137
Submit Documentation Feedback