Analog Devices Inc. ADUSB2EBZ-BOARD

Overview

ADUSB2EBZ-BOARD from Analog Devices is an evaluation board (EVAL-ADUSB2EBZ), also known as USBi, serving as a standalone USB-to-I²C and SPI communications interface and programmer for SigmaDSP® processors and codecs. It supports 1.8 V and 3.3 V target IOVDD operation, delivers up to five SPI slave control channels, and enables real-time tuning and EEPROM programming via SigmaStudio™ on Windows PCs with USB 2.0.

For engineers reviewing the ADUSB2EBZ-BOARD datasheet, ADUSB2EBZ-BOARD pinout, ADUSB2EBZ-BOARD application, or ADUSB2EBZ-BOARD equivalent, key selection considerations include USB 2.0 host compatibility, dual-voltage I/O regulation, SigmaStudio integration, ribbon-cable-based target interfacing, and self-boot EEPROM programming capability for SigmaDSP systems.

Technical Context

The ADUSB2EBZ-BOARD centers on the Cypress CY7C68053 USB microcontroller, which acts as a protocol translator between USB 2.0 commands from SigmaStudio and I²C/SPI transactions to target ICs. It integrates a 24 MHz crystal oscillator for timing stability and uses on-board ADP1711 LDO regulators to generate both 1.8 V and 3.3 V IOVDD rails.

Target communication occurs through a 10-pin ribbon cable header (J1) carrying SCL/SDA, SPI signals (CDATA, CCLK, CLATCH1–5), BRD_RESET, and 5 V power. The board includes an onboard 24AA256 I²C EEPROM (address 0x51) for vendor ID identification and firmware boot, plus analog switches (ADG721BRMZ) to isolate the I²C bus during boot.

Key Specifications

Availability

ADUSB2EBZ-BOARD is available at Aetrix Electronics and suitable for SigmaDSP development, audio codec configuration, real-time DSP tuning, and in-circuit EEPROM programming requiring stable component supply and full SigmaStudio toolchain support.

Supply support for ADUSB2EBZ-BOARD includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, communications, and audio applications.

The EVAL-ADUSB2EBZ belongs to Analog Devices' SigmaDSP evaluation platform product line, designed specifically to accelerate development, debugging, and production programming of SigmaDSP-based audio processing systems using SigmaStudio.

FAQ

What is the primary function of the ADUSB2EBZ-BOARD?

The ADUSB2EBZ-BOARD is an evaluation board that functions as a USB-to-I²C/SPI interface (USBi) for programming and real-time control of SigmaDSP processors and compatible codecs. It translates USB commands from SigmaStudio into I²C or SPI transactions, enabling register configuration, RAM tuning, and self-boot EEPROM programming - all without requiring an external power supply.

Does the ADUSB2EBZ-BOARD support both I²C and SPI communication simultaneously?

No - the ADUSB2EBZ-BOARD operates in either I²C mode or SPI mode at any given time, indicated by yellow LEDs D1 (I²C active) and D3 (SPI active). While it can communicate with up to five SPI slaves or multiple I²C devices on shared buses, concurrent protocol use is not supported. Mode selection is configured within SigmaStudio's Hardware Configuration tab.

Can the ADUSB2EBZ-BOARD power my target board?

Yes - the ADUSB2EBZ-BOARD supplies 5 V power from the USB host and provides regulated 1.8 V or 3.3 V IOVDD (selected via S1) to the target board via the 10-pin ribbon cable (J1). Power delivery is software-controlled: SigmaStudio's "Device Power On/Off" command toggles the USB_PWR_ON signal, which drives Q1/Q2 transistors to enable/disable target power.

Is the onboard EEPROM on the ADUSB2EBZ-BOARD user-programmable?

No - the 24AA256 EEPROM (U1) at I²C address 0x51 is factory-programmed with vendor ID, product ID, and boot firmware. Writing to address 0x51 will permanently corrupt the USBi functionality. Analog Devices explicitly warns against connecting other EEPROMs at this address, and the board cannot be reprogrammed outside of Analog Devices' facilities.

What USB version requirements apply to the ADUSB2EBZ-BOARD?

The ADUSB2EBZ-BOARD requires a USB 2.0 host port and is incompatible with systems supporting only USB 1.0 or USB 1.1. This is due to its reliance on the Cypress CY7C68053 USB microcontroller, which implements USB 2.0 high-speed signaling and descriptor handling not present in earlier USB specifications.