RM46L450
RM46L850
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SPNS184 –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
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