Omega Engineering PCI-DAS1200 manual C0SRC, Xtrig, Indxgt, Prtrg, FFM0, FIFO Mode, Sample CTR

ARM,

FFM0 These bits work in conjunction with PRTRG during FIFO'd ADC operations.

Direct register level programming is beyond the scope of this manual, and should be attempted only by extremely experienced register level programmers. Call Technical Support for further information.

The table below provides a summary of bit settings and operation.

	PRTRG		FFM0				ARM is set...						FIFO Mode				Sample CTR
																		Starts on...
	0		0				Via SW when					# Samples >1 FIFO
						remaining count <1024							Normal Mode
					------------------------						----------------------------------							ADHF
						Via SW immediately					1/2 FIFO < # Samples < 1 FIFO
													Normal Mode
	0		1			Via SW immediately						# Samples <1/2 FIFO						ADC Pacer
													Normal Mode
	1		0				Via SW when					# Samples >1 FIFO
						remaining count <1024						Pre-Trigger Mode
					------------------------						----------------------------------							ADHF
						Via SW immediately					1/2 FIFO < # Samples < 1 FIFO
												Pre-Trigger Mode
	1		1			Via SW immediately						# Samples <1/2 FIFO,						XTRIG
												Pre-Trigger Mode
C0SRC		This bit allows the user to select the clock source for user Counter 0.
				1 = Internal 10MHz oscillator
				0 = External clock source input via CTR0CLK pin on 100p connector.
READ
15	14	13		12		11		10	9	8		7	6	5	4	3		2	1	0
-	-	-		INDX_GT		-		-	-	-		XTRIG	-	-	-	-		-	-	-
XTRIG				1 = External Trigger flip-flop has been set. This bit is write-cleared.
				0 = External Trigger flip-flop reset. No trigger has been received.

INDX_GT

1 = Pre-trigger index counter has completed its count.

0 = Pre-trigger index counter has not been gated on or has not yet completed its count.

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