Texas Instruments TMS320DM643x manual IcePick Emulation Support in the PSC, PSC Interrupts

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IcePick Emulation Support in the PSC

6.5IcePick Emulation Support in the PSC

The PSC supports IcePick commands that allow IcePick aware emulation tools to have some control over the state of power domains and modules. On the DM643x DMP, this IcePick support only applies to the C64x+ CPU (module number 39 in the AlwaysOn power domain 0).

In particular, Table 6-3shows IcePick emulation commands recognized by the PSC, and indicated ones that apply to the C64x+ CPU on the DM643x DMP.

Table 6-3. IcePick Emulation Commands

Power On and
Enable Features	Power On and Enable Descriptions	Reset Features	Reset Descriptions
Inhibit Sleep	Allows emulation to prevent software from	Assert Reset	Allows emulation to assert the
	transitioning the module out of the enable state.		module’s local reset. Applicable
	Applicable to the DM643x DMP.		to the DM643x DMP.
Force Power	Allows emulation to force the power domain into	Wait Reset	Allows emulation to keep local
	an on state. Not applicable on the DM643x DMP		reset asserted for an extended
	as AlwaysOn power domain is always on.		period of time after software
			initiates local reset de-assert.
			Applicable to the DM643x DMP.
Force Active	Allows emulation to force the module into the	Block Reset	Allows emulation to block
	enable state. Applicable to the DM643x DMP.		software initiated local and
			module resets. Applicable to the
			DM643x DMP.

Note: When emulation tools remove the above commands, the PSC immediately executes a state transition based on the current values in the NEXT bit in PDCTL0 and the NEXT bit in MDCTLn, as set by software.

6.6PSC Interrupts

The PSC has an interrupt that is tied to the C64x+ interrupt controller (INTC). This interrupt is named PSCINT in the interrupt map. The PSC interrupt is generated when certain IcePick emulation events occur.

6.6.1 Interrupt Events

The PSC interrupt is generated when any of the following events occur:

∙Module State Emulation Event

∙Module Local Reset Emulation Event

These interrupt events are summarized in Table 6-4and described in more detail in this section.

		Table 6-4. PSC Interrupt Events
Interrupt Enable Bits
Control Register	Status Bit	Interrupt Condition
MDCTLn	EMUIHB	Interrupt occurs when the emulation alters the module state.
MDCTLn	EMURST	Interrupt occurs when the emulation alters the module's local reset.

The PSC interrupt events only apply when IcePick emulation alters the state of the module from the user-programmed state in the NEXT bit in MDCTLn. As discussed in Section 6.5, on the DM643x DMP, IcePick support only applies to the C64x+ CPU (module 39), therefore the PSC interrupt condition only applies to module 39.

66 Power and Sleep Controller SPRU978E–March 2008

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