SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
The debugger connects to the device through its JTAG interface. The first level of debug interface seen by the debugger is the ICEPick module embedded in the debug subsystem.
ICEPick version D (ICEPick-D) is used in the device.
SoC designs typically have multiple processors, each having a JTAG TAP embedded in the processor. The ICEPick module manages these TAPs and the power, reset, and clock controls for modules that have TAPs.
The ICEPick module is visible only from the debugger point of view and thus cannot be programmed by application software. The debugger can configure ICEPick through its own TAP controller. The ICEPick TAP has an instruction length of 6 bits and is the primary TAP. It is always visible in the scan chain and is used to control and monitor the other secondary TAPs.
ICEPick provides the following debug capabilities:
The ICEPick module implements a connect register, which must be configured with a predefined key to enable the full set of JTAG instructions. Once the debug connect key is properly programmed, ICEPick signals and subsystems emulation logics should be turned on.
For more information about ICEPick dynamic TAP insertion, see Section 33.3.3, Dynamic TAP Insertion.
For more information about ICEPick PRCM features, see Section 33.6, Power, Reset, and Clock Management Debug Support.