ADSP-SC589 EZ-Board® Evaluation System Manual
34
Bit Signal Name
Description
FET
Processor Signal
(if applicable)
Component
Connected
Default
Enables S/PDIF digital
connectors
U16,
U19
DAI0_PIN19,
DAI0_PIN20
The table below shows the output signals of the Microchip GPIO expander (U48), with a TWI address
of 0100 010X, where X represents the read or write bit. The signals that control an individual FET
have an entry under the
column. The
column shows the board IC that is
FET
Component Connected
connected if the FET is enabled. Note that some of the Microchip (U48) output signals are connected
directly to components on the board. However, in most cases, the Microchip (U48) 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
under the
column.
bold font
Processor Signal
Output Signals of Microchip GPIO Expander (U48 Port A)
Bit Signal Name
Description
FET
Processor Signal
(if applicable)
Component
Connected
Default
0
PUSHBUTTON1_EN
PF_00 is used as GPIO input for
push button 1, enabled by default
U23
PF_00/TM0_TMR6/
SPI1_SEL6
U32
Low
1
PUSHBUTTON2_EN
PF_01 is used as GPIO input for
push button 2, enabled by default
U24
PF_01/TM0_TMR7/
SPI1_SEL7
U33
Low
2
LED10_EN
PE_13 is used as GPIO output for
LED10, enabled by default
U20
PE_13/SPI1_CLK/
PPI0_D20/
SMSC0_AMS1
U6
Low
3
LED11_EN
PE_14 is used as GPIO output for
LED11, enabled by default
U21
PE_14/SPI1_MISO/
PPI0_D21/
SMSC0_ABE0
U6
Low
4
LED12_EN
PE_15 is used as GPIO output for
LED12, enabled by default
U22
PE_15/SPI1_MOSI/
PPI0_D22/
SMSC0_ABE1
U6
Low
3.3 Push Buttons and Switches
This section describes operation of the push buttons and switches.
