Softconfig On The Board; Programming Softconfig Switches - Analog Devices ADSP-SC573 EZ-KIT Manual

Software-Controlled Switches (SoftConfig)
Figure 3-5: Example of a Mechanical Switch (Equivalent to Example of Bus Switch)

SoftConfig on the Board

Two Microchip MCP23017 GPIO expanders provide control for individual electronic switches. The TWI0 inter-
face of the processor communicates with the Microchip devices. There are individual switches with default settings
that enable basic board functionality.
The Default Processor Interface Availability table lists the processor and board interfaces that are available by de-
fault. Note that only interfaces affected by software switches are listed in the table.
Table 3-1: Default Processor Interface Availability
Interface
UART0
SPI Flash
Audio Connectors
SD Card
S/PDIF Digital
Pushbuttons
LEDs

Programming SoftConfig Switches

On the board, two Microchip MCP23017 devices exist. Each of these devices have the following programming
characteristics:
3–6
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Availability by Default
USB to UART FTDI232RQ
Quad mode enabled
4 inputs/8 outputs
Write protect enabled
S/PDIF RCA input and output connectors enabled
Enabled
Enabled
®
ADSP-SC573 EZ-KIT Manual