ARM ARM7TDMI - Determining the Core and System State

Debug Interface
ARM DDI 0210C Copyright © 2001, 2004 ARM Limited. All rights reserved. 5-13
5.5 Determining the core and system state
When the core is in debug state, you can examine the core and system state by forcing
the load and store multiples into the instruction pipeline.
Before you can examine the core and system state, the debugger must determine if the
processor entered debug from Thumb state or ARM state, by examining bit [4] of the
EmbeddedICE-RT logic debug status register. When bit [4] is HIGH, the core has
entered debug from Thumb state.
For more details about determining the core state, see Determining the core and system
state in debug state on page B-24.