LTC2990
16
2990fe
For more information www.linear.com/LTC2990
applicaTions inForMaTion
Table 4. STATUS Register (Default 0x00)
BIT NAME OPERATION
b7 0 Always Zero
b6 V
CC
Ready 1 = V
CC
Register Contains New Data, 0 = V
CC
Register Read
b5 V4 Ready 1 = V4 Register Contains New Data, 0 = V4 Register Read
b4 V3, T
R2
, V3 – V4 Ready 1 = V3 Register Contains New Data, 0 = V3 Register Data Old
b3 V2 Ready 1 = V2 Register Contains New Data, 0 = V2 Register Data Old
b2 V1, T
R1
, V1 – V2 Ready 1 = V1 Register Contains New Data, 0 = V1 Register Data Old
b1 T
INT
Ready 1 = T
INT
Register Contains New Data, 0 = T
INT
Register Data Old
b0 Busy* 1= Conversion In Process, 0 = Acquisition Cycle Complete
*In Repeat mode, Busy = 1 always
Table 5. CONTROL Register (Default 0x00)
BIT NAME OPERATION
b7 Temperature Format Temperature Reported In; Celsius = 0 (Default), Kelvin = 1
b6 Repeat/Single Repeated Acquisition = 0 (Default), Single Acquisition = 1
b5 Reserved Reserved
b[4:3] Mode [4:3] Mode Description
0 0 Internal Temperature Only (Default)
0 1 T
R1
, V1 or V1 – V2 Only per Mode [2:0]
1 0 T
R2
, V3 or V3 – V4 Only per Mode [2:0]
1 1 All Measurements per Mode [2:0]
b[2:0] Mode [2:0] Mode Description
0 0 0 V1, V2, T
R2
(Default)
0 0 1 V1 – V2, T
R2
0 1 0 V1 – V2, V3, V4
0 1 1 T
R1
, V3, V4
1 0 0 T
R1
, V3 – V4
1 0 1 T
R1
, T
R2
1 1 0 V1 – V2, V3 – V4
1 1 1 V1, V2, V3, V4
