Texas Instruments MSP430x4xx Family, User Manual

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EEM Introduction
31-5 Embedded Emulation Module (EEM)
31.2.2 Trigger Sequencer
The trigger sequencer allows the definition of a certain sequence of trigger
signals before an event is accepted for a break or state storage event. Within
the trigger sequencer, it is possible to use the following features:
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Four states (State 0 to State 3)
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Two transitions per state to any other state
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Reset trigger that resets the sequencer to State 0.
The Trigger sequencer always starts at State 0 and must execute to State 3
to generate an action. If State 1 or State 2 are not required, they can be
bypassed.
31.2.3 State Storage (Internal Trace Buffer)
The state storage function uses a built-in buffer to store MAB, MDB, and CPU
control signal information (ie. read, write, or instruction fetch) in a nonintrusive
manner. The built-in buffer can hold up to eight entries. The flexible
configuration allows the user to record the information of interest very
efficiently.
31.2.4 Clock Control
The EEM provides device dependent flexible clock control. This is useful in
applications where a running clock is needed for peripherals after the CPU is
stopped (e.g. to allow a UART module to complete its transfer of a character
or to allow a timer to continue generating a PWM signal).
The clock control is flexible and supports both modules that need a running
clock and modules that must be stopped when the CPU is stopped due to a
breakpoint.