E702289_SH7290 Datasheet, PDF (221/252 Pages) Renesas Technology Corp – SH7290 E10A Emulator

• Low-Power States (Sleep, Software Standby, Module Standby, and U Standby)
For low-power consumption, the SH7290 has sleep, software standby, module standby, and U
standby states.
The sleep, software standby, and module standby states are switched using the SLEEP instruction.
When the emulator is used, only the sleep state can be cleared with either the normal clearing
function or with the [Stop] button, and a break will occur. For the U standby state, refer to section
6.5.11, Notes on U Standby State.
Note: The memory must not be accessed or modified in sleep state.
• RESET Signals (/RESETP and /RESETM)
The SH7290 RESET signals (/RESETP and /RESETM) are only valid during emulation started
with clicking the GO or STEP-type button. If these signals are input from the user system in
command input wait state, they are not sent to the SH7290.
Note:
Do not break the user program when the /RESETP, /RESETM, /BREQ, and /WAIT
signals are being low. A TIMEOUT error will occur. If the /BREQ and /WAIT
signals are fixed to low during break, a TIMEOUT error will occur at memory
access.
• Direct Memory Access Controller (DMAC)
The DMAC operates even when the emulator is used. When a data transfer request is generated,
the DMAC executes DMA transfer.
• Memory Access during User Program Execution
When a memory is accessed from the memory window, etc. during user program execution, the
user program is resumed after it has stopped in the E10A emulator to access the memory.
Therefore, realtime emulation cannot be performed.
The stopping time of the user program is as follows:
Environment:
Host computer: 650 MHz (Pentium^® III)
SH7290: 20 MHz (CPU clock) (mode 0. FRQCR = H’1003, 20-MHz input clock)
JTAG clock: 3.75 MHz
When a one-byte memory is read from the command-line window, the stopping time will be about
20 ms.
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