Technical Reference Manual
002-29852 Rev. *B
4.13.2.2 CM4_DWT_CYCCNT
Description:
Cycle Count register
Address:
0xE0001004
Offset:
0x4
Retention:
Retained
IsDeepSleep:
No
Comment:
The CYCCNT register characteristics are:
Purpose: Shows or sets the value of the processor cycle counter, CYCCNT.
Usage constraints: The DWT unit suspends CYCCNT counting when the processor is in
Debug state.
Configurations:
Implemented only when CTRL.NOCYCCNT is RAZ, see Control register, CTRL on page C1-
797.
When CTRL.NOCYCCNT is RAO no cycle counter is implemented and this register is
UNK/SBZP.
Attributes: See Table C1-21 on Arm TRM page C1-797.
Default:
0x0
Bit-field Table
Bits
7
6
5
4
3
2
1
0
Name
CYCNT [7:0]
Bits
15
14
13
12
11
10
9
8
Name
CYCNT [15:8]
Bits
23
22
21
20
19
18
17
16
Name
CYCNT [23:16]
Bits
31
30
29
28
27
26
25
24
Name
CYCNT [31:24]
Bit-fields
Bits Name
SW
HW
Default or
Enum
Description
0:31
CYCNT
RW
RW
0
Incrementing cycle counter value. When enabled,
CYCCNT increments on each processor clock cycle.
On overflow, CYCCNT wraps to zero.
329
2022-04-18
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