Freescale Semiconductor SC140 Event Detection Channel EDCAi, Comparators Selection Used to

			Event Detection Unit (EDU) Channels and Registers
	Table 4-19. EDCA_CTRL Description (Continued)
Name	Description	Settings
EDCAEN	Event Detection Channel (EDCAi)	0000	= EDCAi is disabled.
Bits	Enable — Used to enable or disable	0001	= EDCAi is disabled, but is enabled when an event is
13–10	event detection channels. When it is	detected by EDCA0.
	enabled, it continues to operate until it is	0010	= EDCAi is disabled, but is enabled when an event is
	explicitly disabled by writing 0000 into	detected by EDCA1.
	EDCAEN bits, or EDCAEN bits are	0011	= EDCAi is disabled, but is enabled when an event is
	changed for another enabling condition.	detected by EDCA2.
	The channel remains disabled until a	0100	= EDCAi is disabled, but is enabled when an event is
	new enabling condition occurs.	detected by EDCA3.
		0101	= EDCAi is disabled, but is enabled when an event is
	When bits EDCAEN are set to enable	detected by EDCA4.
	the operation of EDCAi upon detection	0110	= EDCAi is disabled, but is enabled when an event is
	of an event, the EOnCE overwrites	detected by EDCA5.
	these bits to 1111 one cycle after the	0111	= EDCAi is disabled, but is enabled when an event is
	appearance of the event.	detected by the optional external EDCA6
		1000	= EDCAi is disabled, but is enabled when an event is
	When the event detection channel is	detected by the optional external EDCA7.
		1001	= EDCAi is disabled, but is enabled when an event is
	programmed to detect PC, the PC of the
		detected by EDCD.
	first instruction cycle after the channel
		1010	= EDCAi is disabled, but is enabled when a count
	has been enabled is not yet detected.
		event is detected.
	The latency for enabling a channel is	1011	= EDCAi is disabled, but is enabled when a signal EEi
		is asserted and EEi in the EE_CTRL register is
	one cycle.
		programmed to be an input.
		1100	= EDCAi is enabled but will be disabled when EEi is
		negated, in both cases and EEi is programmed as an
		input in the EE_CTRL register. This state can only be
		reached by previously being in the 1011 state and
		asserting the EEi pin.
		1101	= Reserved
		1110	= Reserved
		1111	= EDCA is enabled.
CS	Comparators Selection — Used to	00 = Comparator A only
Bits 9–8	select the desired combination of	01 = Comparator B only
	comparator A and comparator B results.	10 = Comparator A AND Comparator B
	An event detection can be generated in	11 = Comparator A OR Comparator B
	the following cases:
	• Only comparator A condition is
	detected.
	• Only comparator B condition is
	detected.
	• Both comparator A and comparator
	B conditions are detected.
	• Either comparator A or comparator
	B conditions are detected.

SC140 DSP Core Reference Manual 4-55