1FEATURES

2• Compatible with IEEE Std. 1149.1 (JTAG) Test

Access Port and Boundary Scan Architecture

• Supported by Texas Instruments' SCAN Ease

(SCAN Embedded Application Software

Enabler) Software Rev 2.0

• Uses Generic, Asynchronous Processor

Interface; Compatible with a Wide Range of

Processors and Processor Clock (PCLK)

Frequencies

• 16-Bit Data Interface (IP Scalable to 32-bit)

• 2k x 32 Bit Dual-Port Memory

• Load-on-the-Fly (LotF) and Preloaded Vector

Operating Modes Supported

• On-Board Sequencer Allows Multi-Vector

Operations such as those Required to Load

Data Into an FPGA

• On-Board Compares Support Test Data In

(TDI) Validation Against Preloaded Expected

Data

• 32-Bit Linear Feedback Shift Register (LFSR)

at the Test Data In (TDI) Port for Signature

Compression

• State, Shift, and BIST Macros Allow

Predetermined Test Mode Select (TMS)

Sequences to be Utilized

• Operates at 3.3 V Supply Voltages with 5 V

Tolerant I/O

• Outputs Support Power-Down TRI-STATE

Mode.

DESCRIPTION

The SCANSTA101 is designed to function as a test

master for an IEEE 1149.1 boundary scan test

system. It is suitable for use in embedded IEEE

1149.1 applications and as a component in a stand-

alone boundary scan tester.

The SCANSTA101 is an enhanced version of, and a

replacement for, the SCANPSC100. The

SCANSTA101 supports the IEEE 1149.1 Test Access

Port (TAP) standard and the IEEE 1532 standard for

in-system configuration of programmable devices.

The SCANSTA101 improves test vector throughput

and reduces software overhead in the system

processor. The SCANSTA101 presents a simple,

register-based interface to the system processor.

Texas Instruments provides C-language source code

which can be included in the embedded system

software. The combination of the SCANSTA101 and

its support software comprises a simple API for

boundary scan operations.

The interface from the SCANSTA101 to the system

processor is implemented by reading and writing

registers, some of which map to locations in the

SCANSTA101 memory. Hardware handshaking and

interrupt lines are provided as part of the processor

interface.

The SCANSTA101 is available as a stand-alone

device packaged in a 49-pin NFBGA package. It is

also available as an IP macro for synthesis in programmable logic devices.