Boundary scan description language (BSDL) is a hardware description language for electronics testing using JTAG. It has been added to the IEEE Std. 1149.1, and BSDL files are increasingly well supported by JTAG tools for boundary scan applications, and by test case generators.
BSDL overviewedit
BSDL was a subset of VHDL.[1] However, since IEEE 1149.1-2013, it is no longer a "proper" subset of VHDL but it is considered based on VHDL.[2] It is formally defined in IEEE Standard 1149.1 Annex B. Each BSDL file describes one version of an IC and has many package pin maps as are available for a particular die. This is necessary because, for example, two different BGA packages will have different balls; even if the ball has the same name it may be bonded to a different signal on the other package, and sometimes bondings change between revisions.
Each digital signal (pin or ball) on the package is defined, as are the registers and opcodes used in an IEEE1149.1, IEEE 1149.6, IEEE 1149.8.1, IEEE 1532 and IEEE 1149.4 compliant IC. There is one instruction register, a minimum of a 1-bit bypass register, one boundary scan register and optionally a 32 bit device_id register. The registers other than the instruction register are called TDRs or Test Data Registers. The boundary scan register (BSR) is unique as it is the register which is also mapped to the I/O of the device. Many of the BSDL definitions are sets of single long string constants.
Note that registers not involved in boundary scan are often not defined. Instructions that are not publicly defined are included in the INSTRUCTION_PRIVATE section. Microprocessor register descriptions in BSDL typically do not include enough information to aid in building a 1149.1 based emulator or debugger.
External linksedit
Free public library of BSDL files for many devices
boundary, scan, description, language, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scho. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Boundary scan description language news newspapers books scholar JSTOR November 2009 Learn how and when to remove this template message Boundary scan description language BSDL is a hardware description language for electronics testing using JTAG It has been added to the IEEE Std 1149 1 and BSDL files are increasingly well supported by JTAG tools for boundary scan applications and by test case generators BSDL overview editBSDL was a subset of VHDL 1 However since IEEE 1149 1 2013 it is no longer a proper subset of VHDL but it is considered based on VHDL 2 It is formally defined in IEEE Standard 1149 1 Annex B Each BSDL file describes one version of an IC and has many package pin maps as are available for a particular die This is necessary because for example two different BGA packages will have different balls even if the ball has the same name it may be bonded to a different signal on the other package and sometimes bondings change between revisions Each digital signal pin or ball on the package is defined as are the registers and opcodes used in an IEEE 1149 1 IEEE 1149 6 IEEE 1149 8 1 IEEE 1532 and IEEE 1149 4 compliant IC There is one instruction register a minimum of a 1 bit bypass register one boundary scan register and optionally a 32 bit device id register The registers other than the instruction register are called TDRs or Test Data Registers The boundary scan register BSR is unique as it is the register which is also mapped to the I O of the device Many of the BSDL definitions are sets of single long string constants Note that registers not involved in boundary scan are often not defined Instructions that are not publicly defined are included in the INSTRUCTION PRIVATE section Microprocessor register descriptions in BSDL typically do not include enough information to aid in building a 1149 1 based emulator or debugger External links editFree BSDL Compiler Validates Grammar Semantics and Syntax according to IEEE standard rules Free public library of BSDL files for many devices BSDL Tutorial BSDL Files BSDL amp SVF file formats functions and featuresReferences edit BSDL Tutorial Corelis Education IEEE 1149 1 2013 IEEE Standard for Test Access Port and Boundary Scan Architecture standards ieee org Retrieved 2019 02 25 nbsp This computer engineering related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Boundary scan description language amp oldid 1127645594, wikipedia, wiki, book, books, library,
