PIN
Logic
scm-027
PIN
Logic
scm-026
PIN
Logic
scm-028
Public Version
SCM Programming Model
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13.5.5 I/O Power Optimization Guidelines
To optimize I/O power, it is important to avoid unconnected or incorrectly pulled pins. According to the
type of pins, the way to reduce power consumption can differ.
shows the three available pin
(or ball) types.
Table 13-69. Pin Types
Input
Output
Bidirectional
The configuration differs according to the I/O cell types. The following describes some pieces of advice
which can be useful to avoid extra current leakage:
•
For input pins, use a pullup/down when possible.
•
For output pins, check existing pulls to avoid conflicts.
•
For bidirectional pins, reconfigure the pin as an output driving 0 when possible.
Some I/O configurations involve modifications during the software setup of I/Os and sometimes require
several hardware updates.
shows how to optimize the power consumption of pads.
2542
System Control Module
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated
