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32186 Datasheet(PDF) 897 Page - Renesas Technology Corp |
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32186 Datasheet(HTML) 897 Page - Renesas Technology Corp |
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897 / 1032 page  JTAG 21 21-3 32185/32186 Group Hardware Manual Rev.1.10 REJ09B0235-0110 May 15, 07 Figure 21.2.1 Configuration of the JTAG Circuit 21.2 Configuration of JTAG Circuit The JTAG circuit consists of the following circuit blocks. • Instruction register to hold the instruction code that is fetched through the boundary-scan path • A set of registers which are accessed through the boundary-scan path • Test access port (abbreviated TAP) controller to control the JTAG unit’s state transition • Control logic to select input, output, etc. The figure below shows the configuration of the JTAG circuit. 21.2 Configuration of JTAG Circuit JTCK JTMS JTRST TAP Controller Instruction Register (6-bit) (JTAGIR) Decoder JTDO ID Code Register (JTAGIDR) Bypass Register (JTAGBPR) Boundary Scan Register (JTAGBSR) JTDI Data register set M32R/ECU |
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