AD9545 no-OS Example Project

See projects/ad9545 (doxygen) for the Doxygen documentation.

The EVAL-AD9545 evaluation board is designed for testing the AD9545 clock generator IC, notable for its high-precision multi-output clock generation. It includes two digital cleaning PLL cores to optimize clock synchronization. The board offers up to five differential clock outputs, configurable through a serial port, and optionally supports an external EEPROM for settings retention and power management. Applications range from telecommunications to industrial automation, requiring precise timing solutions.

Applications

Global positioning system (GPS), PTP (IEEE 1588), and synchronous Ethernet (SyncE) jitter cleanup and synchronization
Optical transport networks (OTN), synchronous digital hierarchy (SDH), and macro and small cell base stations
Small base station clocking, including baseband and radio
Stratum 2, Stratum 3e, and Stratum 3 holdover, jitter cleanup, and phase transient control
JESD204B support for analog-to-digital converter (ADC) and digital-to-analog converter (DAC) clocking
Cable infrastructures
Carrier Ethernet

Hardware Specifications

Power Supply Requirements

The EVAL-AD9545 evaluation board requires a 6V power connection via a wall adapter to activate its on-board LDO voltage regulators. These regulators provide key voltage outputs of 1.8V and 3.3V, crucial for the board's operation. Critical components, such as the ADP2384 and ADP7104 regulators, manage these voltage levels to support the board's functionalities, including generating up to five differential clock outputs and utilizing EEPROM for settings retention. Additionally, power is supplied via USB for communication with a PC, enabling configuration through the provided Windows-based software.

Connectors

Connector Type	Description	Functionality
J300	SMB Connector	Reference input for single-ended or differential signals
J301	SMB Connector	Reference input for single-ended or differential signals
J400	SMA Connector	System clock input option for external sources
P605	Jumper Block	GPIO configuration for clock and data lines
P504	Jumper Block	Serial data line configuration
P511	Jumper Block	Serial data line configuration

No-OS Build Setup

Please see: No-OS Build Guide

No-OS Supported Examples

The initialization data used in the example is taken out from the Project Common Data Path.

The macros used in Common Data are defined in platform specific files found in the Project Platform Configuration Path.

Basic example

The basic example code for the AD9545 device within the no-OS project showcases the initialization and configuration of the device's clock systems. This includes the setup of reference clocks, PLLs, NCOs, and output clocks. Configuration begins by specifying initialization parameters for communication interfaces like UART, SPI, and I2C via structures including ad9545_uart_ip, ad9545_spi_ip, and ad9545_i2c_ip. The basic_example_main function oversees the initialization and configuration process, setting clock rates, assigning parent clocks, and recalibrating PLLs through functions such as ad9545_init, ad9545_setup, and ad9545_calib_aplls. This ensures accurate clock source management. Error handling is incorporated to address possible initialization failures, with ongoing verification through continuous operation checks.

In order to build the basic example, make sure you have the following configuration in the Makefile:

# Select the example you want to enable by choosing y for enabling and n for disabling
BASIC_EXAMPLE = y

No-OS Supported Platforms

Linux Platform

Connections

Connect the 6V wall power supply to the main power connector labeled P700.
Connect the USB cable to the EVAL-AD9545 evaluation board and the Linux platform. The red LED labeled 'DS301' should illuminate, and the LED labeled 'USB_STA' should blink.

Build Command

# navigate to the project directory
cd no-OS/projects/ad9545
# to build the project
make PLATFORM=linux
# to flash the code
make run