C11.11 Synchronization Period Register
The TRCSYNCPR characteristics are:
Purpose
Controls how often periodic trace synchronization requests occur.
Usage constraints
• You must always program this register as part of trace unit initialization.
• Accepts writes only when the trace unit is disabled.
Configurations
Available in all configurations.
Attributes
See C11.1 ETM register summary on page C11-733.
31
0
RES0
45
Period
Figure C11-10 TRCSYNCPR bit assignments
[31:5]
Reserved, RES0.
PERIOD, [4:0]
Defines the number of bytes of trace between synchronization requests as a total of the number
of bytes generated by both the instruction and data streams. The number of bytes is 2
N
where N
is the value of this field:
• A value of zero disables these periodic synchronization requests, but does not disable other
synchronization requests.
• The minimum value that can be programmed, other than zero, is 8, providing a minimum
synchronization period of 256 bytes.
• The maximum value is 20, providing a maximum synchronization period of 2
20
bytes.
The TRCSYNCPR can be accessed through the external debug interface, offset 0x034.
C11 ETM registers
C11.11 Synchronization Period Register
100236_0100_00_en Copyright © 2015–2017, 2019 Arm Limited or its affiliates. All rights
reserved.
C11-748
Non-Confidential
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