HD6417606 RENESAS [Renesas Technology Corp], HD6417606 Datasheet - Page 440

• Manufacturer Part Number: HD6417606
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 17 User Debugging Interface (H-UDI)
Data loaded into the output pin boundary scan register in the Capture-DR state is not used for
external circuit testing (it is replaced by a shift operation).
The upper four bits of the instruction code are 0000.
IDCODE: A command can be set in SDIR by the H-UDI pins to place the H-UDI pins in the
IDCODE mode stipulated by JTAG. When the H-UDI is initialized (TRST is asserted or TAP is in
the Test-Logic-Reset state), the IDCODE mode is entered.
CLAMP, HIGHZ: A command can be set in SDIR by the H-UDI pins to place the H-UDI pins in
the CLAMP or HIGHZ mode stipulated by JTAG.
17.5.2
• Boundary scan mode does not cover clock-related signals (EXTAL, XTAL, CKIO, and
• Boundary scan mode does not cover system- and E10A-related signals (RES and ASEMD).
• Boundary scan mode does not cover H-UDI-related signals (TCK, TDI, TDO, TMS, and
• When the EXTEST, CLAMP, and HIGHZ commands are set, fix the RES pin low.
• When a boundary scan test for other than BYPASS and IDCODE is carried out, fix the
17.6
• An H-UDI command, once set, will not be modified as long as another command is not re-
• Because LSI operations are suspended in standby mode, H-UDI commands are not accepted.
• The H-UDI is used for emulator connection. Therefore, H-UDI functions cannot be used when
Rev. 4.00 Sep. 13, 2007 Page 414 of 502
REJ09B0239-0400
TESTOUT2).
TRST).
ASEMD pin high.
issued from the H-UDI. If the same command is given continuously, the command must be set
after a command (BYPASS, etc.) that does not affect LSI operations is once set.
To hold the state of the TAP before and after standby mode, the TCK signal must be high
during standby mode transition.
using an emulator.
Points for Attention
Usage Notes