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Overview

SmartDV’s IEEE 1149.7 DTS Adapter IP is a silicon-proven, fully featured Debug Test System Adapter solution purpose-built for SoC designs requiring standards-compliant reduced-pin cJTAG debug host-side connectivity across System-on-Chip, System-on-Package, and Package-on-Package applications. Fully compliant with IEEE 1149.7-2009 (cJTAG), it delivers complete DTS Adapter functionality supporting all six IEEE 1149.7 classes T0 through T5, generating reset and escape sequences for TAP controller management on the host debug tool side of a cJTAG link.

Designed to serve as the debug tool-side complement to a Compact TAP target, the IP implements the Extended Protocol Unit (EPU) for Classes T0 through T3 with all mandatory and optional commands, and the Advanced Protocol Unit (APU) for Classes T4 and T5. Its Transport function supporting 1 or 2 physical data channels with up to 16 data channel clients each, support for both 4-pin and 2-pin interface configurations, and all mandatory and optional scan formats (JScan, MScan, OScan, and SScan) give debug tool and probe SoC teams a production-tested, spec-complete DTS Adapter implementation.

Built for design flexibility and silicon efficiency, the IP core is fully synthesizable, and is highly configurable for both ASIC and FPGA implementations, with a strong focus on area optimization, power management, and peak performance. Its parameterized class and topology architecture and clean host interface enable fast integration and confident design bring-up across a wide range of process nodes and target applications.

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IEEE 1149.7 DTS Adapter
Key Features
  • Full DTS Adapter Functionality – Complete Debug Test System Adapter implementation per IEEE 1149.7-2009 supporting all classes T0 through T5
  • Reset and Escape Sequence Generation – Complete reset and escape sequence generation for host-side TAP controller management
  • Extended Protocol Unit – Complete EPU implementation for Classes T0 through T3 with all mandatory and optional commands
  • Advanced Protocol Unit – Complete APU implementation for Classes T4 and T5
  • Multi-Channel Transport Function – Transport function with 1 or 2 physical data channels (PDC), each supporting up to 16 data channel clients (DCC) access
  • Flexible Pin Interface – 4-pin and 2-pin interface configurations per IEEE 1149.7 CJTAG
  • All Scan Formats – Complete support for JScan, MScan, OScan, and SScan mandatory and optional scan formats
  • Complete Scan Terminology Support – Data Register Scan, Instruction Register Scan, Control Register Scan, and Zero-Bit Scan
  • Flexible Scan Topology – Series scan (Class T0-T5), Star-4 scan (Class T3-T5), and Star-2 scan (Class T4-T5) topology support
  • User-Defined Extensibility – Extendable with user-defined instructions and registers for application-specific debug requirements
Compliance and Compatibility
  • Fully compliant with IEEE 1149.7-2009 standard specification (cJTAG)
  • Fully backward compatible with IEEE 1149.1
  • Configurable SoC interface supporting AMBA AXI, AHB, APB, and custom wrappers for seamless integration
  • Compatible with ASIC and FPGA design flows across leading foundry process nodes
  • Compatible with all major EDA synthesis, simulation, and linting flows

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