| Copyright © 2010 ARM. All rights reserved. | ARM DDI 0461B |
| Non-Confidential | ID010111 |
 PDF version | |
| Home > Functional Description > Backwards compatibility > Restrictions while in stopped state |
| |||
| Home > Functional Description > Backwards compatibility > Restrictions while in stopped state | |||
Writing to the following registers causes unpredictable behavior in Circular Buffer mode in the Stopped state in the TMC, but are permitted in the Stopped state in the CoreSight ETB.
RRP
RWP
RWD
TRG
the EnFt and EnTI bits of the FFCR.
Debug tools must instead transition to the Disabled state before writing to these registers, as Circular Buffer mode describes.
It is not necessary to write to the RRP and RWP registers in most usage models because the pointers are managed automatically. When EnFt is set, debug tools can read the contents of the Circular Buffer in Stopped state solely by successive reads of the RRD Register.
| Copyright © 2010 ARM. All rights reserved. | ARM DDI 0461B |
| Non-Confidential | ID010111 |
| PDF version | |
| Home > Functional Description > Backwards compatibility > Restrictions while in stopped state |