DSP56857 datasheet(403/662 Pages) FREESCALE

Part #	DSP56857

Description	Digitial Signal Controller

PDF	662 Pages

Scroll/Zoom	100%

Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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403 / 662 page

Block Diagram

General Purpose Input/Output (GPIO), Rev. 4

Freescale Semiconductor

15-3

15.1 Introduction

The 5685x General Purpose Input/Output (GPIO) is designed to share package pins with other

peripheral modules on the chip. If a peripheral normally controls a given pin is not required, that

pin then can be programmed to be a GPIO with programmable pull-up.

15.2 Features

The GPIO module design includes these distinctive features:

•

Individual control for each pin to be in either Normal or GPIO mode

•

Individual direction control for each pin in GPIO mode

•

Individual pull-up enable control for each pin in either Normal or GPIO mode except for

MODA, B, and C pins because pull-ups are always disabled

15.3 Block Diagram

Figure 15-1. Bit-Slice View of GPIO Logic

D_in

D_out

Peripheral Data Out

Peripheral Data In

Peripheral Out Enable

I/O Cell

Data Register

GPIO

DSP56857 Datasheet(PDF) 403 Page - Freescale Semiconductor, Inc