AMD XCF128XFTG64C

Overview

XCF128XFTG64C from Xilinx is a 128-Mb in-system programmable NOR flash memory optimized for Virtex-5 and Virtex-6 FPGA configuration via Slave SelectMAP (x16) interface, delivering up to 800 Mb/s bitstream transfer at 50 MHz clock, with 16-bit data bus, READY_WAIT handshake synchronization, and industrial temperature range (–40°C to +85°C). It serves as high-density, single-chip configuration storage in PCI Express endpoint and high-reliability embedded systems.

For engineers reviewing the XCF128XFTG64C datasheet, pinout, applications, or equivalent options, key selection criteria include synchronous burst read performance, BPI-compatible interface timing, FPGA configuration mode compatibility (Slave SelectMAP only), block-level erase endurance (10,000 cycles), and FT64 package mechanical constraints.

Technical Context

The XCF128XFTG64C implements a multi-bank 8-Mb × 16 architecture with 127 main blocks (1 Mb each) and 4 parameter blocks (256 Kb each), enabling concurrent read and program/erase operations across banks. Its synchronous burst read mode powers up by default and supports up to 54 MHz sequential access with automatic suspension/resumption capability.

It integrates dedicated control logic for FPGA configuration handshaking via READY_WAIT (open-drain input/output), uses separate VDD (1.8 V) and VDDQ (2.5 V or 3.3 V) supplies, and supports JEDEC-standard command set with CFI query support for system-level NOR flash compatibility.

Key Specifications

Pinout & Package

Package: FT64 - 64-pin fine-pitch thin-gull-wing package, 10 mm × 13 mm footprint, 1.0 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA configuration storage applications.

Compared with XCF128XFTG64C, the XCF32PFTG64C offers pin-compatible downsizing for cost-sensitive Virtex-5 applications, while the MT28EW128ABA1HPC-0SIT provides raw NOR density without FPGA-optimized handshaking - making XCF128XFTG64C the only solution delivering guaranteed 800 Mb/s, READY_WAIT synchronization, and MultiBoot out-of-box.

Availability

XCF128XFTG64C is available at Aetrix Electronics and suitable for PCI Express endpoint boot, Virtex-6 FPGA configuration, telecom line card initialization, and defense avionics reconfiguration requiring stable component supply across extended product lifecycles.

Supply support for XCF128XFTG64C 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

Xilinx (now part of AMD) is a fabless semiconductor company specializing in programmable logic devices, FPGA architectures, and configurable system-on-chip solutions for high-performance computing and adaptive hardware acceleration.

The Platform Flash XL product line was designed specifically to eliminate configuration bottlenecks in Virtex-5 and Virtex-6 systems - integrating FPGA-aware timing, handshaking, and MultiBoot features into a single NOR flash die.

FAQ

Is XCF128XFTG64C compatible with Virtex-7 or UltraScale FPGAs?

No. XCF128XFTG64C is explicitly supported only for Virtex-5 and Virtex-6 FPGAs per DS617 documentation. It lacks the command set, timing parameters, and configuration mode support required for Virtex-7 or UltraScale families. Using it with newer FPGAs may result in failed configuration or undefined behavior. For Virtex-7/UltraScale, Xilinx specifies different configuration PROMs such as the XCFxxS series or QSPI-based solutions.

What is the purpose of the READY_WAIT pin on XCF128XFTG64C?

The READY_WAIT pin on XCF128XFTG64C provides hardware synchronization between the flash and FPGA during configuration startup. By default, it operates as an open-drain input pulled high externally; the device drives it low during reset and releases it upon readiness. When wired to the FPGA's INIT_B pin, it forms a wired-AND handshake ensuring the FPGA does not begin configuration until the XCF128XFTG64C is fully initialized and ready to deliver valid data.

Can XCF128XFTG64C be programmed directly via JTAG without an FPGA present?

No. XCF128XFTG64C does not have a native JTAG interface. Programming requires indirect in-system programming via a connected Virtex-5 or Virtex-6 FPGA using Xilinx iMPACT software and a JTAG cable. The FPGA acts as a bridge, loading an in-system programming engine that controls the XCF128XFTG64C's BPI interface. Standalone programmers must use third-party gang programmers supporting the BPI protocol and MCS file format.

Does XCF128XFTG64C support simultaneous read and erase operations?

Yes - but only across different banks. The XCF128XFTG64C's 16-bank architecture allows a read operation to proceed in one bank while an erase or program operation executes in another. However, only one bank can be in erase/program mode at any time, and burst reads may cross bank boundaries without interruption. This enables MultiBoot bitstream switching without halting active configuration.

What voltage levels are required for VDDQ on XCF128XFTG64C?

XCF128XFTG64C supports VDDQ at either 2.5 V or 3.3 V, independently of the 1.8 V VDD core supply. The I/O buffers are designed to interface directly with Virtex-5/6 FPGA SelectMAP pins operating at those voltages. Selection is determined by board-level power design - no internal configuration is needed. Both levels are fully characterized in DS617 for timing and drive strength.