Datasheet

177
RM57L843
www.ti.com SPNS215C –FEBRUARY 2014–REVISED JUNE 2016
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Peripheral Information and Electrical SpecificationsCopyright © 2014–2016, Texas Instruments Incorporated
7.5 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.
7.5.1 Features
The GPIO module has the following features:
• Each I/O 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 5.10.1 and Section 5.10.2.