Software-Controlled Switches (SoftConfig)
2-8
ADSP-BF707 EZ-KIT Lite Evaluation System Manual
Programming SoftConfig Switches
On the ADSP-BF707 EZ-KIT Lite, two Microchip MCP23017 devices
exist. Each of these devices have the following programming
characteristics:
• Each switch has two programmable GPIO registers.
• Each GPIO register controls eight signals (software switches).
• By default, the Microchip MCP23017 GPIO signals function as
input signals.
The signals must be programmed as output signals to override their
default values. The following tables (
)
show the Microchip register addresses and the values that must be
written to them to program the signals as output signals.
Table 2-1. Default ADSP-BF707 Processor Interface Availability
Interface
Availability by Default
UART0
USB to UART conversion through U45 (FTDI FT232RQ) with flow
control
CAN0
Transmit/receive disabled
CAN1
Enabled
Push buttons
Enabled
LEDs
Enabled
GPIO Register
Register Address
GPIOA
0x12
GPIOB
0x13
Содержание EZ-KIT Lite ADSP-BF707
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