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Bitporter User Guide
www.achronix.com
PAGE 1
Chapter 1 – Configuration Overview
Introduction
Achronix Semiconductor delivers the world’s fastest commercially available FPGAs. Using CMOS
process technology and conventional SRAM-based device configuration, Speedster™ FPGAs are
capable of operating at 1.5 GHz of system throughput by using unique picoPIPE™ technology.
The embedded programming and configuration logic in the FPGA is designed to support a
variety of programming options.
Figure 1-1 outlines the basic block diagram of the
programming and configuration logic, including additional logic to implement security
features. The configuration management unit controls the startup and shutdown sequence
from configuration mode to the user mode and back. The configuration management unit
includes the provisions for configuring the device with a secure bitstream using a 256-bit
Advanced Encryption Standard (AES) algorithm in Cipher Block Chaining (CBC) mode. The
device contains a small non-volatile memory for the storage of the required AES key.
This guide covers configuration via the JTAG port using the Achronix Bitporter pod.
Figure 1-1: Speedster Configuration Options
Configuration Logic
FPGA
User Logic
JTAG
USB
Bitporter
Pod
JTAG
Interface
External CPU
CPU Slave
Controller
Serial (SPI)
Flash
SPI Flash
Controller
Serial
Data
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FPGA
Configuration
Management
Unit
SRAM Scan
Chain
AES
Decode
AES NV
Key
Storage
Mode and Status Pins
Ethernet