Analog Devices ADSP-BF707 EZ-KIT Lite Manual page 44

Software-Controlled Switches (SoftConfig)
Bit Signal Name
0
1
2
3
2-10
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2
Table 2-5. I C Hardware Address 0x42
GPIO MCP23017 Register Address
GPIOA 0x12
GPIOB 0x13
The ADSP-BF707 EZ-KIT Lite Schematic
GPIO expanders are connected to the board's ICs.
Table 2-6 and Table 2-7
expander ( ), with a TWI address of 0100 001X, where X represents the
U39
read or write bit. The signals that control an individual FET have an entry
under the FET column. The Component Connected column shows the
board IC that is connected if the FET is enabled. The Microchip (
controlling the enable signal of a FET switch. Also note that if a particular
functionality of the processor signal is being used, it will be in bold font
under the Processor Signal column.
Table 2-6. Output Signals of Microchip GPIO Expander
(U39 Port A)
Description
SPI flash CS
SPIFLASH_CS_EN
SPI flash D2
SPIFLASH_D2_EN
SPI flash D3
SPIFLASH_D3_EN
RF wireless SPI chip
RF_SPI2_SEL1_EN
select
ADSP-BF707 EZ-KIT Lite Evaluation System Manual
Default Value
0x85
0x83
shows how the two Microchip
show the output signals of the Microchip GPIO
FET Processor Signal
(if applicable)
U3 PB_15/SPI2_SEL1/
TRACE0_D00/
SMC0_D15/SPI2_SS
U4 PB_13/SPI2_D2/
UART1_RTS/
TRACE0_D02/
SMC0_D13
U5 PB_14/SPI2_D3/
UART1_CTS/
TRACE0_D01/
SMC0_D14
U28 PB_15/SPI2_SEL1/
TRACE0_D00/
SMC0_D15/SPI2_SS
) is
U39
Component Default
Connected
Low
U33
Low
U33
Low
U33
High
J3