E702289_SH7290 Datasheet, PDF (243/252 Pages) Renesas Technology Corp – SH7290 E10A Emulator

The following shows the procedures recovered from the U standby state.
1. In the software standby mode, when the /CA pin is asserted, the emulator enters the U
standby state and the message box shown in figure 6.17 is displayed. To cancel the U
standby state, be sure to end the message box before asserting /RESETP from the user
system.
2. Turn Vcc (main) off.
Figure 6.17 Message Box for Entering the U Standby State
3. Assert /RESETP and turn Vcc (main) on.
4. After the power has been stable, negate the /CA pin.
5. Negate /RESETP, and the U standby state is cancelled.
6. Before the program execution is restarted from the reset vector, the E10A debugging function,
which has been set in the [Recovery Information] page in the [Configuration] dialog box, is
recovered. During this period, the HDI cannot operate.
Notes: 1. For entering or canceling the U standby state, refer to the section of low power mode
in the SH7290 Series Hardware Manual.
2. When Vcc (main) is turned on in the U standby state, set the TCK value to less than
the number of peripheral module clocks and select [Configuration dialog information]
in the [Recovery Information] page. If this is not selected, the TCK value will be as
follows:
When HS7290KCI01H or HS7290KCI02H is used: TCK = 1.031 MHz
When HS7290KCM01H or HS7290KCM02H is used: TCK = 0.937 MHz
3. After the /CA pin has been negated, if /RESETP is not input for about 30 seconds, a
timeout error will occur.
4. Software breakpoints that have recovered from the U standby state remain to be set on
the memory. However, the contents displayed in the [Breakpoints] window may be
different from the actual points when the contents of memory is initialized by the
control of Vcc (main). In this case, clear all the breakpoints and set them again.
5. In functions for which conditions were not recovered by a selection in [Recovery
information], the settings made will not be the same as the contents displayed in a
dialog box or command after the recovery from the U standby state until when the
user program is halted.
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