Datasheet

ADSP-BF609 EZ-KIT Lite Evaluation System Manual 2-15
ADSP-BF609 EZ-KIT Lite Hardware Reference
Table 2-9 and Table 2-10 show the output signals of the Microchip GPIO
expander (
U47), with a TWI address of 0100 011X, where X represents the
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.Note that some of the
Microchip (
U47) output signals are connected directly to components on
the board. However, in most cases, the Microchip (U47) is 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 “Pro-
cessor Signal” column.
3 ~SD_WP_EN SD memory write pro-
tect connected to GPIO
PG10, enabled by
default
U14 PG13/~UART1_
CTS~/TM0_CLK
J5 Low
4
~SPIFLASH_CS_EN SPI flash chip select
SPI0SEL1 connection to
U38 SPI flash, connected
by default
U13 PD11/~SPI0_
SEL1
/SPI0_SS
U38 Low
5 ~SPI0D2_EN SPI flash data 2 connec-
tion to U38 SPI flash,
connected by default.
This is needed for quad
access mode.
U12 PD00/SPI0_
D2/PPI1_
D16/~SPI0_SEL3
U38 Low
6
~SPI0D3_EN SPI flash data 3 connec-
tion to U38 SPI flash,
connected by default.
This is needed for quad
access mode.
U16 PD01/SPI0_
D3
/PPI1_
D17/~SPI0_SEL2
U38 Low
Table 2-8. Output Signals of Microchip GPIO Expander
(U46 Port B) (Cont’d)
Bit Signal Name Description FET Processor Signal
(if applicable)
Component
Connected
Default