RM0453 Rev 5 1341/1450
RM0453 Debug support (DBG)
1435
38.6.2 DWT cycle count register (DWT_CYCCNTR)
Address offset: 0x004
Reset value: 0x0000 0000
38.6.3 DWT CPI count register (DWT_CPICNTR)
Address offset: 0x008
Reset value: 0x0000 0000
38.6.4 DWT exception count register (DWT_EXCCNTR)
Address offset: 0x00C
Reset value: 0x0000 0000
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
CYCCNT[31:16]
rrrrrrrrrrrrrrrr
1514131211109876543210
CYCCNT[15:0]
rrrrrrrrrrrrrrrr
Bits 31:0 CYCCNT[31:0]: processor clock cycle counter
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
1514131211109876543210
Res. Res. Res. Res. Res. Res. Res. Res. CPICNT[7:0]
rw rw rw rw rw rw rw rw
Bits 31:8 Reserved, must be kept at reset value.
Bits 7:0 CPICNT[7:0]: CPI counter
Counts additional cycles required to execute multi-cycle instructions (except those recorded
by DWT_LSUCNTR) and counts any instruction fetch stalls.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
1514131211109876543210
Res. Res. Res. Res. Res. Res. Res. Res. EXCCNT[7:0]
rw rw rw rw rw rw rw rw
Bits 31:8 Reserved, must be kept at reset value.
Bits 7:0 EXCCNT[7:0]: exception overhead cycle counter
Counts the number of cycles spent in exception processing.
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