AMD XC3S1000-4FG320I

Overview

XC3S1000-4FG320I from AMD (formerly Xilinx) is a Spartan-3 FPGA with 1,000,000 system gates, 17,280 logic cells, and 512 kB of total block RAM. It features a 320-pin Fine-Pitch Ball Grid Array (FBGA) package, -4 speed grade, and industrial temperature range (–40°C to +100°C). It is used in high-volume embedded control and digital signal processing applications requiring reconfigurable logic.

For engineers reviewing the XC3S1000-4FG320I datasheet, pinout, applications, or equivalent options, key selection criteria include logic density, I/O count (224 user I/Os), distributed RAM capacity, DLL-based clock management, and industrial-grade thermal performance.

Technical Context

The XC3S1000-4FG320I implements a hierarchical FPGA architecture with configurable logic blocks (CLBs), dedicated multipliers, and eight Digital Clock Managers (DCMs) supporting phase shifting, frequency synthesis, and duty cycle correction. It supports SelectIO standards including LVCMOS, LVTTL, HSTL, and SSTL.

Configuration is performed via Master Serial, Slave Serial, or JTAG modes using external PROM or processor-controlled interfaces. The device uses 1.2 V core voltage and 3.3 V or 2.5 V I/O voltage options, with internal VCCINT regulation and dedicated configuration pins (e.g., INIT_B, PROGRAM_B, DONE).

Key Specifications

Pinout & Package

XC3S1000-4FG320I is housed in a 320-pin Fine-Pitch Ball Grid Array (FBGA) package with 22 mm × 22 mm body size, 1.0 mm ball pitch, and standard JEDEC MO-230 footprint. Pin functions are defined per Xilinx DS099 v2.5 and include dedicated configuration, clock, I/O, and power/ground terminals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA-based logic implementation applications.

Compared with XC3S1000-4FG320I, the XC3S1000-5FG320C offers improved timing margin but lacks industrial temperature qualification, while the XC3S1500-4FG320I provides headroom for logic growth within identical mechanical and thermal constraints.

Availability

XC3S1000-4FG320I is available at Aetrix Electronics and suitable for motor control systems, industrial PLC modules, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for XC3S1000-4FG320I 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

AMD acquired Xilinx in 2022 and continues development and support of the Spartan, Artix, Kintex, and Virtex FPGA families.

The Spartan-3 family, including XC3S1000-4FG320I, was designed for cost-sensitive, high-volume embedded applications requiring balanced logic density, I/O flexibility, and industrial reliability.

FAQ

What is the core voltage requirement for XC3S1000-4FG320I?

The XC3S1000-4FG320I requires a regulated 1.2 V ±3% supply on VCCINT pins. This core voltage powers the internal logic fabric and DCMs. Deviation beyond tolerance risks timing violations or configuration failure. Decoupling capacitors must be placed per Xilinx UG331 guidelines to suppress switching noise.

Does XC3S1000-4FG320I support JTAG boundary-scan testing?

Yes, XC3S1000-4FG320I fully supports IEEE 1149.1 JTAG boundary-scan through dedicated TDI, TDO, TMS, and TCK pins. The device implements TAP controller and instruction register compliant with Xilinx configuration and debug protocols. JTAG is used for programming, debugging, and interconnect testing in assembled PCBs.

How many Digital Clock Managers (DCMs) does XC3S1000-4FG320I contain?

XC3S1000-4FG320I contains eight independent Digital Clock Managers (DCMs). Each DCM supports input clock multiplication, division, phase shifting, and duty cycle correction. These are essential for synchronizing multiple clock domains and meeting setup/hold timing in complex digital systems using XC3S1000-4FG320I.

Can XC3S1000-4FG320I be configured via a microcontroller?

Yes, XC3S1000-4FG320I supports Slave Serial configuration mode, allowing a microcontroller to stream the configuration bitstream via DIN and CCLK pins. The microcontroller must assert PROGRAM_B, monitor INIT_B and DONE, and meet timing requirements specified in DS099. This method enables field updates and dynamic reconfiguration.

What is the maximum number of user I/Os supported by XC3S1000-4FG320I?

XC3S1000-4FG320I supports 224 user-programmable I/Os across its 320-ball FBGA package. These are distributed across eight I/O banks, each configurable for different voltage standards. Unused I/Os can be left unconnected or tied to appropriate voltage levels per Xilinx DCI guidelines.