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参数资料
| 型号： | EVAL-ADUSB2EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL USB TO SPI/12C |
| 标准包装： | 1 |
| 系列： | SigmaDSP® |
| 附件类型： | 接口板 |
| 适用于相关产品： | SigmaStudio? |
AN-1006
APPLICATION NOTE
One Technology Way ? P.O. Box 9106 ? Norwood, MA 02062-9106, U.S.A. ? Tel: 781.329.4700 ? Fax: 781.461.3113 ? www.analog.com
Using the EVAL-ADUSB2EBZ
by Brett Gildersleeve
INTRODUCTION
The EVAL-ADUSB2EBZ features USB-to-I 2 C and SPI conversion.
It is compatible with 1.8 V and 3.3 V target devices and allows
for SigmaStudio? integration for most SigmaDSP? processors.
Its on-board power regulators are capable of supplying the
target board, and it features a standard Aardvark-compatible
programming header. The EVAL-UDSUB2EBZ provides SPI
control of up to five slave devices with a low profile surface-
mount USB miniature Type B connector, and it allows for plug-
and-play operation.
The EVAL-ADUSB2EBZ is ideal for downloading code
and register settings to SigmaDSP processors and codecs
with SigmaStudio. It can also be used for real-time tuning
of SigmaDSP production units with SigmaStudio.
GENERAL DESCRIPTION
The EVAL-ADUSB2EBZ, also known as the USBi, is a standalone
communications interface and programmer for SigmaDSPsystems.
It translates USB control commands from SigmaStudio to the I 2 C
The ribbon cable and 10-pin header form a bridge to the target
board to connect the communications signals to the target IC.
The ribbon cable also carries 5 V power from the USB hub, which
can be used to power the target board if desired.
The on-board regulators enable both 1.8 V and 3.3 V IOVDD
operation, allowing for increased compatibility with target
devices.
Up to five slave devices can be controlled by the USBi simulta-
neously. To control multiple SPI devices, additional latch signals
are provided, although they are not connected to the ribbon cable.
The USBi can be used to control SigmaDSP systems in real time
via SigmaStudio, and is capable of programming an EEPROM
in self-boot systems. It is an ideal solution for in-circuit program-
ming and tuning of prototype systems.
The USBi only supports USB 2.0 interfaces; the USBi will not
work with PCs that only support USB Version 1.0 and USB
Version 1.1.
and SPI communications protocols. The USBi is powered over
the USB cable; therefore, no external power supply is required.
FUNCTIONAL BLOCK DIAGRAM
EVAL-ADUSB2 (USBi)
POWER
REGULATOR
1.8V/3.3V
SELECTOR
SWITCH
TARGET
HOST PC
BOARD
SigmaStudio
USB
CONNECTOR
CYPRESS
USB INTERFACE
PROGRAMMING
HEADER
SIGMA
DSP
EEPROM
PROGRAMMING
EEPROM
HEADER
Figure 1.
Rev. A | Page 1 of 16
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