R0E417250MCU00 Datasheet, PDF (185/228 Pages) Renesas Technology Corp – E100 Emulator MCU Unit for H8SX/1700 Series

R0E417250MCU00 User’s Manual
5. Debugging Functions
5.13.14 Maximum Measurement Time for Realtime Profiles
(1) Maximum measurement time
The timer used for realtime profile measurement is configured with a 40-bit counter. The maximum measurement time varies
with the selected unit of measurement.
Select the unit of measurement from the Measurement interval drop-down list of the Properties dialog box.
The maximum measurable times for the respective units are listed below.
Table 5.43 Maximum measurable times
Resolution
Maximum measurable time
10 ns
Approx. 3 hours, 03 minutes, 15 seconds
20 ns
Approx. 6 hours, 06 minutes, 30 seconds
40 ns
Approx. 12 hours, 13 minutes, 00 seconds
80 ns
Approx. 24 hours, 26 minutes, 00 seconds
160 ns
Approx. 48 hours, 52 minutes, 01 seconds
1.6 µs
Approx. 488 hours, 40 minutes, 18 seconds
CAUTION
Note that results of performance measurement carry an error equal to ±(twice the resolution + 100ns), e.g. ±140 ns when the
resolution is 20 ns, each time a function is entered. If the resolution is 20 ns and a function is entered 10 times, the error is
±1400 ns.
(2) Maximum measured number of calls
For a realtime profile, a 16-bit counter measures the number of times a task or function is executed. Measurement of up to
65,535 calls is thus possible.
REJ10J1831-0200 Rev.2.00 Jun.1, 2009
Page 185 of 228