Push Buttons And Switches - Analog Devices ADSP-SC589 EZ-Board Manual

Bit Signal Name
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
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
Output Signals of Microchip GPIO Expander (U48 Port A)
Bit Signal Name
0 PUSHBUTTON1_EN
1 PUSHBUTTON2_EN
2 LED10_EN
3 LED11_EN
4 LED12_EN

3.3 Push Buttons and Switches

This section describes operation of the push buttons and switches.
ADSP-SC589 EZ-Board® Evaluation System Manual
Description
Enables S/PDIF digital
connectors
FET column. The Component Connected
bold font under the
Description
PF_00 is used as GPIO input for
push button 1, enabled by default
PF_01 is used as GPIO input for
push button 2, enabled by default
PE_13 is used as GPIO output for
LED10, enabled by default
PE_14 is used as GPIO output for
LED11, enabled by default
PE_15 is used as GPIO output for
LED12, enabled by default
FET Processor Signal
(if applicable)
U16,
DAI0_PIN19,
U19
DAI0_PIN20
Processor Signal column.
FET Processor Signal
(if applicable)
U23 PF_00/TM0_TMR6/
SPI1_SEL6
U24 PF_01/TM0_TMR7/
SPI1_SEL7
U20
PE_13/SPI1_CLK/
PPI0_D20/
SMSC0_AMS1
U21
PE_14/SPI1_MISO/
PPI0_D21/
SMSC0_ABE0
U22
PE_15/SPI1_MOSI/
PPI0_D22/
SMSC0_ABE1
Component
Connected
column shows the board IC that is
Component
Connected
U32
U33
U6
U6
U6
Default
Default
Low
Low
Low
Low
Low
34