Builder
Developer	MathStar
Manufacturer	TSMC
Type	Programmable logic device
Introduction	2002 (announced) 2003 (launch)
Production	2003-2006
Word size	16 bit 2 octets 4 nibbles
Process	130 nm 0.13 μm 1.3e-4 mm
Technology	CMOS
Clock	100 MHz-1,000 MHz
Succession
	→
	Arrix

Builder was a family of FPOAs introduced by MathStar in 2003. This family the earliest attempt at designing an FPOA and was discontinued shortly after due to some technical issues. The Builder family was phased out entirely by 2006.

Architecture

Main article: field-programmable object array

The Builder family was the MathStar's initial attempt at a field-programmable object array. Each chip contains 100s of silicon objects laid out in a grid, broken down to arrays of five objects each. Instructions are loaded to each of the objects at power-up.

Inter-Object communication was done primarily by passing data to the nearest neighbor through a unidirectional synchronous interconnect. Communication is configured dynamically and on-demand. Each object had the facilities needed for clock synchronization, built-in self-test, etc...

Object

There are five different types of components: Arithmetic Logic Unit (ALU), Content Addressable Memory (CAM), Cyclic Redundancy Check (CRC), Multiply Accumulator (MAC), and Register File (RF). The control program guides the overall program execution and the datapath setup. Datapath is 16-bit but may be combined with adjacent objects to form larger datapaths of desired size.

Type:

• ALU
  • 16-bit add/sub/shift/rotate/AND/OR/XOR
  • circuitry for cascading status bits for making larger word
• truth function
  • 4x 4:1 lookup tables
• MAC
  • 16x16 single clock cycle multiplier
  • 40-bit accumulator
• RF
  • 320 Bytes
  • Configurable 20 or 40-bit data
  • Two modes:
    • Dual-ported RAM, single-cycle access
    • Single-cycle FIFO
• CRC
  • 16x 20-bit patterns
  • 20-bit result
  • output feedback
• Internal Block RAM
  • 1024x76b (9KB)

Members

The amount and types of the individual objects were chosen based on the applications the were meant to run on the chip. MathStar divided the product line into BridgeBuilder, FilterBuilder, StorageBuilder, SecurityBuilder and SwitchBuilder.

BridgeBuilder

The BridgeBuilder series was designed for high-speed networking applications handling 10Gbps or more as well as bus bridging applications.

Model	Objects	Parallel I/O Inter.	Serial I/O Trans.	GPIO	36-bit Memory Cntr
SOA13C20	200	0-1	0-4	50-200	0-2
SOA13C40	400	0-2	0-16	50-200	0-2
SOA13C80	800	0-2	0-16	50-200	2-4
SOA13C120	1200	0-3	16	50-200	4

FilterBuilder

The FilterBuilder series was designed for filter applications (high performance FFTs and FIRs).

Model	Objects	Parallel I/O Inter.	GPIO	36-bit Memory Cntr
SOA13D156	156	0-1	50-200	0-2
SOA13D40	400	0-2	50-200	0-2

StorageBuilder

The FilterBuilder series was aimed to be combined with MathStar's network offload engine.

SecurityBuilder

The SecurityBuilder series was designed for various security applications with libraries that implement custom versions of security protocols at up to 10Gbps throughput.

SwitchBuilder

The SwitchBuilder series was designed for high-performance switching/networking applications such as for PCI-Express, Fibre Channel, Ethernet, RapidIO and others.

Documents

Datasheet / Brief

• MathStar FPOA Architecture, 2003
• MathStar Builder Family, 2003
• MathStar BridgeBuilder Series, 2003
• MathStar FilterBuilder Series, 2005

Software

• MathStar Tools Overview

Application Notes

• 8K Point FFT Implementation
• 1024 Point FFT Implementation
• 64 8-Tap PolyPhase FFT Implementation
• RAID 6 Q Encoder Implementation

See also

• field-programmable object array
• Ambric's Am2000