MCP9804 Datasheet, PDF (29/54 Pages) Microchip Technology – ±0.25°C Typ. Accuracy Digital Temperature Sensor

MCP9804
5.1.6 RESOLUTION REGISTER
This register allows the user to change the sensor
resolution (see Section 5.2.4). The POR default
resolution is 0.25°C. The selected resolution is also
reflected in the Capability register (see Register 5-2).
REGISTER 5-7: RESOLUTION → ADDRESS ‘0000 1000’b
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
bit 7
R/W-1
R/W-1
Resolution
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-3
bit 2-0
Unimplemented: Read as ‘0’
Resolution:
00 = LSB = 0.5°C (t_CONV = 30 ms typical)
01 = LSB = 0.25°C (t_CONV = 65 ms typical)
10 = LSB = 0.125°C (t_CONV = 130 ms typical)
11 = LSB = 0.0625°C (power up default, t_CONV = 250 ms typical)
SCL
SDA
12 34 5678
12345678
12345678
S0
0
1
1
A
2
A
1
A
0
W
A
C
K
0
0
0
0
1
0
0
A
0
C
K
0
0
0
00
0
A
1 1C
K
P
Address Byte
Resolution Pointer
MCP9804
MCP9804
Data
MCP9804
FIGURE 5-9:
Section 4.0).
Timing Diagram for Changing T_A Resolution to 0.0625°C <0000 0011>b (See
© 2009 Microchip Technology Inc.
DS22203A-page 29