RM48L550PGET 参数 Datasheet PDF下载

SPNS174

–

SEPTEMBER 2011

5.3

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.

5.3.1

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

and

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Peripheral Information and Electrical Specifications

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2011, Texas Instruments Incorporated