Renesas CE2000-H8S Series, User Manual

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4.2.4
External Area
The external target area will be accessed as long as the area does not belong to:
•
Internal ROM
•
Internal RAM
•
Internal I/O
•
Mapped Emulator Optional Memory
User has to set the area to be read/write or write protected, in order to access the area. Otherwise, the
area will be treated as Access inhibited or Guarded.
The number of accessing states and type of access (e.g. DRAM access) will be determined by the H8S
registers (eg. BSC, WCR1...).
4.3 Low Power Mode
For reduced power consumption, the H8S has medium speed, sleep, module stop, hardware standby,
and software standby mode
4.3.1 Hardware Standby Mode
The hardware standby mode is switched by the STBY signal input. This signal will initialise the
emulator registers. In default, the STBY signal is masked in the
Configure Platform dialog.
The status of the STBY signal from the user’s target system can be monitored by HEW.
4.3.2 Sleep and Software Standby Modes
The sleep and software standby modes are switched using the SLEEP instruction. These modes can be
cleared with either the normal clearing function or with the break condition fulfilled (including ‘ESC’
key input). The program will then be put to a stop.
Trace information is not acquired in sleep and software standby modes.
NOTE: When restarting after a break, the code after the SLEEP instruction will be executed.
4.3.3 Medium Speed and Module Stop Modes
These modes are switched by the setting of the I/O registers in the MCU and not controlled by the
emulator.
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