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H8SX/1663R bảng dữ liệu(PDF) 1239 Page - Renesas Technology Corp

tên linh kiện H8SX/1663R
Giải thích chi tiết về linh kiện  Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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Section 26 Boundary Scan
Rev. 2.00 Sep. 24, 2008 Page 1207 of 1468
REJ09B0412-0200
26.4
Register Descriptions
Boundary scan has the following four registers. These registers cannot be accessed from the CPU.
• Introduction register (JTIR)
• Bypass register (JTBPR)
• Boundary scan register (JTBSR)
• IDCODE register (JTIDR)
Instructions can be input to the instruction register (JTIR) via the test data input pin (TDI) by
serial transfer. The bypass register (JTBPR), which is a 1-bit register, is connected between the
TDI and TDO pins in BYPASS mode. The boundary scan register (JTBSR), which is a JTBSR-bit
register (see table 26.4), is connected between the TDI and TDO pins when test data are being
shifted in. None of the registers is accessible from the CPU.
Table 26.2 shows the availability of serial transfer for the registers.
Table 26.2
Serial Transfers for Registers
Register Abbreviation
Serial Input
Serial Output
JTIR
Available
Not available
JTBPR
Available
Available
JTBSR
Available
Available
JTID
Not available
Available



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