SH7147 Datasheet, PDF (972/1108 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 23 Advanced User Debugger (AUD)
PFBA and PFDA are disabled. After the EN bit shifted to 1, the first output address part of each
trace event is output in 32-bit length.
(2) Guidelines for AUDCK
• When the EN bit in AUCSR is set to 1, AUDCK outputs the clock. When the EN bit is set to 0,
no clock is output.
• AUDCK stops in standby mode. During this period, all values output from AUD and the
AUD’s internal state are retained. Returning from standby restarts the halted processing.
• Changing the CLK0 and CLK1 bits in AUCSR must be done while the EN bit in AUCSR is 0.
• Do not set AUDCK to a frequency higher than 20 MHz.
(3) Writing to the AUD Register
• Values for the AUD are written through the I bus. Therefore, in the cycle immediately after
rewriting the AUD register, no trace with a changed condition can be generated. To acquire the
timing when a condition of the AUD register has changed, read the register that was rewritten
in the last stage one time. Traces after that are valid for the newly written register values.
• Changing the AUD register other than AUCSR must be done while the EN bit in AUCSR is 0.
(4) Other Limitations
• BT whose displacement is 0 and branch data by the BT instruction are also output. The
instruction codes for these are H'8900 and H'8B00.
• If FIFO in the AUD holds valid data, the AUD outputs these data even after the trace function
is disabled, resulting in internally being disabled. Do not enable the trace function while these
data in FIFO are being output. Confirm that the AUD is not outputting the data and then enable
the trace function in the AUD.
• FIFO in the AUD is commonly used with FIFO for PC trace in the UBC. Therefore,
simultaneous use of PC trace in both AUD and UBC is prohibited.
• When the pin function of the AUD is selected by the pin function controller (PFC), do not shift
the AUD to the module standby mode.
Rev. 3.00 Oct. 06, 2008 Page 948 of 1080
REJ09B0230-0300