SH7261 Datasheet, PDF (1192/1348 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

Section 28 User Debugging Interface (H-UDI)
28.5 Usage Notes
1. An H-UDI command, once set, will not be modified as long as another command is not set
again from the H-UDI. If the same command is to be set continuously, the command must be
set after a command (BYPASS mode, etc.) that does not affect chip operations is once set.
2. In software standby mode or H-UDI module standby state, all of the functions in the H-UDI
cannot be used. To retain the TAP status before and after software standby mode or H-UDI
module standby state, keep UDTCK high before entering software standby mode or H-UDI
module standby state.
3. In deep standby mode, all of the functions in the H-UDI cannot be used. H-UDI is initialized in
deep standby mode.
4. Make sure to allow 20 tcyc or more between the signal change timing of the RES and
UDTRST pins.
5. When starting the TAP controller after the negation of the UDTRST pin, make sure to allow
200 ms or more after the negation.
Rev. 2.00 Sep. 07, 2007 Page 1160 of 1312
REJ09B0320-0200