Lantronix XPort XChip - User Guide - Page 72

Command 10h, Get Functions, Get Active Levels, Get Current States, GPIO Interface, XPort User Guide

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9: GPIO Interface Command 10h, Get Functions Send: No parameters Response: 1 parameter Bytes 1-4: Functions Bit X 1 means general purpose I/O available to the user. 0 means dedicated function (e.g., serial flow control, diagnostics) for configurable pin X. Command 11h, Get Directions Send: No parameters Response: 1 parameter Bytes 1-4: Directions Bit X 1 means GPIO X is an output. 0 means it is an input. Command 12h, Get Active Levels Send: No parameters Response: 1 parameter Bytes 1-4: Active levels Bit X 1 means GPIO X is active low (0V when active, 3.3V when inactive). 0 means it is active high (3.3V when active, 0V when inactive). Command 13h, Get Current States Send: No parameters Response: 1 parameter Bytes 1-4: States Bit X 1 means GPIO X is active 0 means it is inactive. XPort User Guide 72

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9: GPIO Interface
Command 10h, Get Functions
Send:
No parameters
Response:
1 parameter
Bytes 1-4: Functions
Bit X
1 means general purpose I/O available to the user.
0 means dedicated function (e.g., serial flow control, diagnostics) for
configurable pin X.
Command 11h, Get Directions
Send:
No parameters
Response:
1 parameter
Bytes 1-4: Directions
Bit X
1 means GPIO X is an output.
0 means it is an input.
Command 12h, Get Active Levels
Send:
No parameters
Response:
1 parameter
Bytes 1-4: Active levels
Bit X
1 means GPIO X is active low (0V when active, 3.3V when inactive).
0 means it is active high (3.3V when active, 0V when inactive).
Command 13h, Get Current States
Send:
No parameters
Response:
1 parameter
Bytes 1-4: States
Bit X
1 means GPIO X is active
0 means it is inactive.
XPort User Guide
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