RM48L930_15 Datasheet, PDF (131/172 Pages) Texas Instruments – RM48Lx30 16- and 32-Bit RISC Flash Microcontroller

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RM48L930, RM48L730, RM48L530
SPNS176C – APRIL 2012 – REVISED JUNE 2015
7.3 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.
7.3.1 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 or pulldown allows unused I/O pins to be left unconnected
For information on input and output timings see Section 5.11 and Section 5.12
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Peripheral Information and Electrical Specifications 131
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