Renesas SH7641 Informações Técnicas descarregar pdf (Página 238)

216

2. Functions that cannot be used while the profile function is being used

(a) Performance measurement function

The profile function is implemented by using the performance measurement function

described in section 6.5.9, Performance Measurement Function. This function cannot be

used when the profile function is enabled.

(b) Step function

When the profile function is enabled, do not use the step function. The profile data cannot

be measured correctly.

When the profile function is enabled, memory access is disabled during user program

execution.

(d) Internal trace function

When the profile function is enabled, mode selection of the internal trace is disabled since

all items of the internal trace modes are selected in the emulator.

(e) Halt function

When the profile function is enabled, do not use the halt function for the internal or AUD

trace.

3. Others

(a) When the profile function is used, the contents that have been set in the performance

measurement function or data that has been measured will be deleted.

(b) Since the profile function is implemented with the internal break, it takes a long time to

start and end the user program execution. The user program execution times under the

following environment are shown below:

Environment:

Host computer: 1 GHz (Pentium

III)

Memory: 512 Mbytes

OS: Windows

SH7641 CPU clock: 64 MHz

Execution program: 10,000 nested calls

(i) When the profile function is not used: 1 second or lower

(ii) When the profile function is used in the setting without including a child function:

7 seconds

(iii) When the profile function is used in the setting including a child function:

149 seconds

1 2 ... 233 234 235 236 237 238 239 240 241 242 243 ... 249 250

Sem comentários

Renesas SH7641 Informações Técnicas Página 238