SI7050-A20 Datasheet, PDF (17/26 Pages) Silicon Laboratories – IC TEMPERATURE SENSORS

Si7050/3/4/5-A20
6. Control Registers
Table 11. Register Summary
Register
User Register 1
Bit 7
RES1
Bit 6
VDDS
Bit 5
RSVD
Bit 4
RSVD
Bit 3
RSVD
Bit 2
RSVD
Bit 1
RSVD
Bit 0
RES0
Notes:
1. Any register not listed here is reserved and must not be written. The result of a read operation on these bits is
undefined.
2. Except where noted, reserved register bits will always read back as “1,” and are not affected by write operations. For
future compatibility, it is recommended that prior to a write operation, registers should be read. Then the values read
from the RSVD bits should be written back unchanged during the write operation.
6.1. Register Descriptions
Register 1. User Register 1
Bit
D7
D6
Name
RES1
VDDS
Type
R/W
R
Reset Settings = 0011_1010
D5
RSVD
R/W
D4
D3
RSVD RSVD
R/W
D2
RSVD
R/W
D1
RSVD
R/W
D0
RES0
R/W
Bit
D7; D0
Name
RES[1:0]
Function
Measurement Resolution:
D6
D5, D4, D3,
D2, D1
VDDS
RSVD
00:
01:
10:
11:
VDD Status:
0:
1:
14 bit
12 bit
13 bit
11 bit
V_DD OK
V_DD Low
The minimum recommended operating voltage is 1.9 V. A transi-
tion of the VDD status bit from 0 to 1 indicates that VDD is
between 1.8 V and 1.9 V. If the VDD drops below 1.8 V, the
device will no longer operate correctly.
Reserved
Rev. 1.0
17