PEB20571 INFINEON [Infineon Technologies AG], PEB20571 Datasheet - Page 123

• Manufacturer Part Number: PEB20571
• Description: ICs for Communications
• Manufacturer: INFINEON [Infineon Technologies AG]

DELIC
PEB 20571
Functional Description
Note: The NMI interrupt maybe enabled/disabled in the INTMASK register.
4.8.4
DSP Run Time Statistics
The DSP run time statistics is used for the DSP work load estimation. By using this HW,
the maximum time spent by the DSP from the FSC until the tasks ends may be found.
The DSP statistics include an eight bit counter STATC which is counting up every 1 s.
Reset by FSC of the frame n+1, only if
the DSP has read the counter already
Maximum Value Register
Counter (in Frame n)
1 s
STATI
STATC
DSP
DSP
Figure 4-15 Statistics Registers
STATC is reset upon FSC rising edge. When the DSP finishes a task, it reads STATC.
The time between two consecutive FSC is always 125 s, therefore, if the DSP is
working properly, the counter value should always be less then 125 s.
If the DSP failed to read the counter value and a new FSC rising edge has arrived, the
counter is not reset. Therefore, the DSP reads a value greater then 125. It means that
the DSP failed to finish it’s tasks within the time frame of 125 s.
The STATI register is added for helping the user to perform the statistics. STATI is a
general purpose 8-bit read/write register.
The user program should perform statistics in the following way:
– The STATC is reset upon detection of FSC rising edge.
– The DSP finishes its activities and reads the value of STATC and STATI. The DSP
compares STATC to the previous maximum value saved in STATI.
– If the new value is larger, it is written to STATI.
The system programmer can get the counter value via P Mailbox and thus can change
the DSP program.
Preliminary Data Sheet
4-39
2003-08