DSP56857E datasheet(9/53 Pages) FREESCALE

9 / 53 page

Introduction

56857 Technical Data, Rev. 6

Freescale Semiconductor

Part 3 Signals and Package Information

All digital inputs have a weak internal pull-up circuit associated with them. These pull-up circuits are

enabled by default. Exceptions:

1. When a pin has GPIO functionality, the pull-up may be disabled under software control.

2. MODE A, MODE B, and MODE C pins have no pull-up.

3. TCK has a weak pull-down circuit always active.

4. Bidirectional I/O pullups automatically disable when the output is enabled.

This table is presented consistently with the Signals Identified by Functional Group figure.

1. BOLD entries in the Type column represents the state of the pin just out of reset.

2. Output(Z) means an output in a High-Z condition.

Table 3-1 56857 Signal and Package Information for the 100-pin LQFP

Pin No.

Signal Name

Type

Description

8VDD

VDD

Power (VDD)—These pins provide power to the internal structures of the

chip, and should all be attached to VDD.

VDD

9VSS

VSS

Ground (VSS)—These pins provide grounding for the internal structures

of the chip and should all be attached to VSS.

VSS

DSP56857E Datasheet(PDF) 9 Page - Freescale Semiconductor, Inc