
FAA20 Embedded NEXCOM Vocoder
Board Manual
This manual has been prepared for the Federal Aviation Administration.
FA100-00107 (March 2004) – Rev 1.0.0 Page 84
8.3.19 IO
The IO command is used to access processor IO memory. A number of
hardware devices are mapped into processor IO memory including the
UART and CPLD.
Table 30: IO Command Syntax
ATTRIBUTE DESCRIPTION
SYNTAX IO addr [hexdata]
addr IO Memory Address (hexadecimal). IO memory addresses
are 16-bit.
PARAMETERS
hexdata Hexadecimal data value (16-bit).
FLASH NO
Read from switch bank .
COM1: io 112
> IO 0112 = 0058
EXAMPLES
Write to UART A scratch register
COM1: io 107 55
> IO 0107 = 0055
Note: Do not enter any leading ‘0x’ characters.
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