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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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BT8376EPF датащи(PDF) 116 Page - Synaptics Incorporated. |
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BT8376EPF датащи(HTML) 116 Page - Synaptics Incorporated. |
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116 / 323 page  2.0 Circuit Description Bt8370/8375/8376 2.12 Joint Test Access Group Fully Integrated T1/E1 Framer and Line Interface 2-88 Conexant N8370DSE 2.12 Joint Test Access Group The Bt8370/8375/8376 incorporates printed circuit board testability circuits in compliance with IEEE Std. P1149.1a–1993, IEEE Standard Test Access Port and Boundary–Scan Architecture, commonly known as JTAG (Joint Test Action Group). The JTAG includes a Test Access Port (TAP) and several data registers. The TAP provides a standard interface through which instructions and test data are communicated (see Figure 2-49). A Boundary Scan Description Language (BSDL) file for the Bt8370/8375/8376 is available from the factory upon request. The test access port consists of the TDI, TCK, TMS, and TDO pins. An internal power on reset circuit resets the JTAG port. 2.12.1 Instructions In addition to the required BYPASS, SAMPLE/PRELOAD, and EXTEST instructions, IDCODE instruction is supported. There are also two private instructions. Table 2-25 lists the JTAG instructions, and their codes. Figure 2-49. JTAG Diagram JTAG Port TCK TMS TDI TDO Table 2-25. JTAG Instructions Instruction Code BYPASS 111 111 SAMPLE/PRELOAD 000 001 EXTEST 000 000 IDCODE 000 010 Private xxx xxx Private xxx xxx |
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