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TMC2084

Standalone Mode CircLink™ Controller

SMSC -> Microchip 

Standalone Mode CircLinkTM Controller

Datasheet

Example 3: Configuring Port D as an INPUT PORT

The figure below shows the case where the port D is configured as INPUT PORT. The port D remains in

high impedance state while the reset signal (reset) remains low level. During this high-impedance state,

data defined by an external pull-up (High) or pull-down (Low) resister must be inputted to port D and any

external input data to port D should be inhibited to avoid conflict. This requires the external tri-state buffer

to inhibit input data during the reset period.

A hold time greater than 5 ns is required to retrieve the data configured by the shared pins and place it on

the onchip memory. Thus, the buffer is added to provide a delay time for the control signal of the external

tri-state buffer.

Only port D remains in Hi-Z while

nRESET = L.

Configuration

by shared pins

L

H

Register

PD7-0

Input data

Reset

generator

nRESET

Delay >5ns

Reset signal

Inside of LSI

Revision 0.1 (03-31-06)

Page 20

DATASHEET

SMSC TMC2084

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