Renesas H8 Series, User Manual

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5.9.3 Selecting the Address Detection Mode and Resolution
In measurement of hardware performance, there are two types of address detection modes: prefetch address
detection mode and PC address detection mode. Select the appropriate address detection mode according to the
measurement mode in use. The resolution can also be selected here.
To select an address detection mode and resolution, click the [Settings…] button on the [Performance Analysis
Properties] dialog box. The [Common Settings of Performance(PA1-8)] dialog box will be displayed.
Figure 5.66 [Common Settings of Performance(PA1-8)] Dialog Box
[Address Control Mode]: Select the method to detect addresses for the rate of execution time.
PC: PC address detection mode
Prefetch: Prefetch address detection mode
[Time Measurement Unit]: Select the timer resolution to be used for measurement from 160ns, 40ns,
20ns, or Target. The timer for execution time measurement has a 40-bit
counter. At 20 ns the maximum time that can be measured is about six hours,
and at 160 µs the maximum time is about two days. When the counter
overflows, “Timer Overflow” is displayed as the result of measurement.
When Target is selected, the counter is incremented by an input clock. The
result of measurement is displayed as 10 digits in hexadecimal.
Select the prefetch address detection mode in Access Count Of Specified Range Measurement, and PC address
detection mode in other measurement modes. Otherwise, the result of the measurement will be incorrect.
5.9.4 Starting Performance Data Acquisition
Executing the user program clears the result of previous measurement and automatically starts measuring the rate
of execution time according to the conditions that have been set. Stopping the user program displays the result of
measurement in the [Performance Analysis] window.
5.9.5 Deleting a Measurement Condition
Select [Reset] from the popup menu with a measurement condition selected to delete the condition.
5.9.6 Deleting All Measurement Conditions
Choose [Reset All] from the popup menu to delete all the conditions that have been set.