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H8SX/1663M Datasheet(PDF) 1238 Page - Renesas Technology Corp |
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H8SX/1663M Datasheet(HTML) 1238 Page - Renesas Technology Corp |
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1238 / 1504 page  Section 26 Boundary Scan Rev. 2.00 Sep. 24, 2008 Page 1206 of 1468 REJ09B0412-0200 26.2 Block Diagram of Boundary Scan Function Figure 26.1 shows the block diagram of the boundary scan function. JTBPR TDI TDO TCK TMS TRST MUX TAP controller Decoder JTIR JTDIR JTBPR: JTBSR: JTIR: JTDIR: Bypass register Boundary scan register Instruction register ID register [Legend] Figure 26.1 Block Diagram of Boundary Scan Function 26.3 Input/Output Pins Table 26.1 shows the I/O pins used in the boundary scan function. Table 26.1 Pin Configuration Pin Name I/O Description TCK Input Test clock input pin Clock signal for boundary scan. Input the clock the duty cycle of which is 50 percent when boundary scan function is used. TMS Input Test mode select pin TDI Input Test data input pin TDO Output Test data output pin TRST Input Test reset input pin |
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