VXI SVM2608 user manual Linear/Fifo, 2WIREOHMS, 4WIREOHMS, ATTN-GAIN1-GAIN0

www.vxitech.com

	Control Register (0x08, 0x30, 0x58, 0x80, 0xA8, 0xD0) — Read & Write
			Linear or FIFO Memory Mode - Determines whether the data is
			captured in Linear (burst) or FIFO (real time) acquisition mode.
D10	LINEAR/FIFO		0 = Linear mode
			1 = FIFO mode
			Pon state = 0
			Function Setting - The digitizer is capable of measuring voltages,
			resistances in 2-wire mode or resistances in 4-wire mode. Before taking a
			measurement, allow for at least 5 ms for internal circuits to settle after
			making changes.
D9 - D8	2WIREOHMS/		00 = Voltage mode
	4WIREOHMS		01 = 4-wire resistance mode
			10 = 2-wire resistance mode
			11 = Invalid state
			Note: These bits are only utilized by Channels 0 – 3. These bits are
			unused by Channels 4 and 5.
			Attenuation and Gain Setting - Valid attenuation settings are x1 and
			x10. Valid gain settings are 1, 2, 5, and 10. Note that there is only one
			current source shared among all four channels, therefore, only one
			resistance measurement can be made at any one time. Before taking a
			measurement, allow for at least 5 ms for internal circuits to settle after
			making changes.
			VOLTAGE MODE (for channels 0-3)
		011		= 1.0 V
		010		= 2.0 V
		001		= 5.0 V
		000		= 10.0 V
		110		= 20.0 V
		101		= 50.0 V
		100		= Invalid state
D7 – D5	ATTN-GAIN1-GAIN0	111		= Invalid state

VOLTAGE MODE (for channels 4-5) 011 = 0.5 V

001 = 1.0 V

000 = 2.0 V

111 = 5.0 V

101 = 10.0 V

100 = 20.0 V

010 = Invalid state

110 = Invalid state

RESISTANCE MODE (Valid for channels 0-3) 011 = 100 Ω; 2 mA current source setting 000 = 1 kΩ; 2 mA current source setting

000 = 10 kΩ; 200 μA current source setting 000 = 100 kΩ; 20 μA current source setting 000 = 1 MΩ; 2 μA current source setting

SVM2608 Programming 35