Analog Devices EVAL-ADAU1466Z, Руководство пользователя

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UG-1135 EVAL-ADAU1466Z User Guide
Rev. 0 | Page 22 of 45
SELF BOOT
A 1 Mb, 20 MHz, SPI, serial EEPROM memory is included on
the EVAL-ADAU1466Z evaluation board. The
ADAU1466 is
capable of booting and executing a program without help from an
external microcontroller. This feature allows any project developed
within
SigmaStudio to execute when the ADAU1466 powers up
or on a rising edge of the RESET pin. Position 1 of Switch S3
switch, the top position of the DIP switch (see Figure 67), sets
the state of the SELFBOOT pin of the
ADAU1466 , which
determines whether a self boot operation occurs.
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Figure 67. Self Boot EEPROM and Slide Switch
To use the self boot functionality, take the following steps:
1. Add an E2Prom block to the project space of the
Hardware Configuration tab. From the Processors (ICs /
DSPs)
folder, click
E2Prom
(see Figure 68) and drag it into
the project space to the right of the toolbox.
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Figure 68. E2Prom IC Selection in SigmaStudio
2. Connect the green input pin of the E2Prom IC to one of
the available blue output pins of the USB Interface block.
3. Set the communication mode to
SPI 0x1 ADR0
(see
Figure 69). (There is no physical connection between the
USBi connector and the EEPROM on the EVAL-
ADAU1466Z. SigmaStudio writes a small program to the
ADAU1466 , which then writes the self boot data from the
master SPI port to the EEPROM.)
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Figure 69. E2Prom Setup in Hardware Configuration Tab
4. Before downloading the self boot data to the EEPROM,
click the
Link-Compile-Download button (see Figure 28)
or press F7 to compile the SigmaStudio project file.
5. When writing to the EEPROM, set the self boot switch
(Position 1 of Switch S3) to the disabled position.
6. Right click the empty white space in the ADAU1466 IC
block in the
Hardware Configuration
tab of SigmaStudio .
From the menu that appears, select Self-boot Memory , then
Write Latest Compilation through DSP (see Figure 70).
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Figure 70. Writing to the EEPROM Through the ADAU1466 Master SPI Port