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H8SX/1663M bảng dữ liệu(PDF) 1241 Page - Renesas Technology Corp |
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H8SX/1663M bảng dữ liệu(HTML) 1241 Page - Renesas Technology Corp |
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1241 / 1504 page ![]() Section 26 Boundary Scan Rev. 2.00 Sep. 24, 2008 Page 1209 of 1468 REJ09B0412-0200 Table 26.3 Boundary Scan Instructions TS3 TS2 TS1 TS0 Instruction 0 0 0 0 EXTEST 0 0 0 1 IDCODE (initial value) 0 0 1 0 CLAMP 0 0 1 1 HIGHZ 0 1 0 0 SAMPLE/PRELOAD 0 1 0 1 Reserved 0 1 1 0 Reserved 0 1 1 1 Reserved 1 0 0 0 Reserved 1 0 0 1 Reserved 1 0 1 0 Reserved 1 0 1 1 Reserved 1 1 0 0 Reserved 1 1 0 1 Reserved 1 1 1 0 Reserved 1 1 1 1 BYPASS 26.4.2 Bypass Register (JTBPR) JTBPR is a 1-bit register and is connected between the TDI and TDO pins when JTIR is set to BYPASS mode. JTBPR cannot be read from or written to by the CPU. 26.4.3 Boundary Scan Register (JTBSR) JTBSR is a shift register to control the external input and output pins of this LSI and is distributed across the pads. The initial values are undefined. JTBSR cannot be accessed by the CPU. The EXTEST, SAMPLE/PRELOAD, CLAMP, and HIGHZ instructions are issued to apply JTBSR in boundary-scan testing conformant to the JTAG standard. Table 26.4 shows the correspondence between the JTBSR bits and the pins of this LSI. |
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