SH7706 Datasheet, PDF (613/749 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7700 Series

Section 21 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 instruction code is 0000.
21.5.2 Notes for Boundary Scan
1. Boundary scan mode does not cover clock-related signals (EXTAL, EXTAL2, XTAL,
XTAL2, CKIO).
2. Boundary scan mode does not cover reset-related signals (RESETP, RESETM, CA).
3. Boundary scan mode does not cover H-UDI-related signals (TCK, TDI, TDO, TMS, TRST).
4. When a boundary scan test is carried out, ensure that the CKIO clock operates constantly.
The CKIO frequency range is as follows:
Minimum: 1 MHz
Maximum: Maximum frequency for respective clock mode specified in the CPG section
Set pins MD[2:0] to the clock mode to be used.
After powering on, wait for the CKIO clock to stabilize before performing a boundary scan
test.
5. Fix the RESETP pin low.
6. Fix the CA pin high, and the ASEMD0 pin low.
21.6 Usage Note
1. An H-UDI command other than an H-UDI interrupt, once set, will not be modified as long as
another command is not re-issued from the H-UDI. An H-UDI interrupt command, however,
will be changed to a bypass command once set.
2. Because chip operations are suspended in standby mode, H-UDI commands are not accepted.
However, the TAP controller remains in operation at this time.
3. The H-UDI is used for emulator connection. Therefore, H-UDI functions cannot be used when
using an emulator.
21.7 Advanced User Debugger (AUD)
The AUD is a function exclusively for use by an emulator. Refer to the User's Manual for the
relevant emulator for details of the AUD.
Rev. 5.00 May 29, 2006 page 565 of 698
REJ09B0146-0500