Texas Instruments MSP430x1xx manual ADC10CTL0, ADC10 Control Register, SHTx

ADC10 Registers

ADC10CTL0, ADC10 Control Register 0

15 14 13 12

11 10 9 8

SREFx

ADC10SHTx

ADC10SR

REFOUT

REFBURST

rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0)

7 6 5 4

3 2 1 0

MSC

REF2_5V

REFON

ADC10ON

ADC10IE

ADC10IFG

ENC

ADC10SC

rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0)

Modifiable only when ENC = 0

SREFx	Bits	Select reference
	15-13	000	VR+ = VCC and VR− = VSS
		001	VR+ = VREF+ and VR− = VSS
		010	VR+ = VeREF+ and VR− = VSS
		011	VR+ = VeREF+ and VR− = VSS
		100	VR+ = VCC and VR− = VREF− / VeREF−
		101	VR+ = VREF+ and VR− = VREF− / VeREF−
		110	VR+ = VeREF+ and VR− = VREF− / VeREF−
		111	VR+ = VeREF+ and VR− = VREF− / VeREF−
ADC10	Bits	ADC10 sample-and-hold time
SHTx	12-11	00	4 x ADC10CLKs
		01	8 x ADC10CLKs
		10	16 x ADC10CLKs
		11	64 x ADC10CLKs
ADC10SR	Bit 10	ADC10 sampling rate. This bit selects the reference buffer drive capability for
		the maximum sampling rate. Setting ADC10SR reduces the current
		consumption of the reference buffer.
		0	Reference buffer supports up to ~200 ksps
		1	Reference buffer supports up to ~50 ksps
REFOUT	Bit 9	Reference output
		0	Reference output off
		1	Reference output on
REFBURST	Bit 8	Reference burst. REFOUT must also be set.
		0	Reference buffer on continuously
		1	Reference buffer on only during sample-and-conversion

ADC10 18-25