MCP9808
5.1.6
This register allows the user to change the sensor
resolution (see Section 5.2.4 “Temperature
RESOLUTION REGISTER
Resolution”). The POR default resolution is
+0.0625°C. The selected resolution is also reflected in
the Capability register (see Register 5-2).
REGISTER 5-7:
RESOLUTION REGISTER (→ ADDRESS ‘0000 1000’b)
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
R/W-1
R/W-1
Resolution
bit 7
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 7-2
bit 1-0
Unimplemented: Read as ‘0’
Resolution bits
00= +0.5°C (tCONV = 30 ms typical)
01= +0.25°C (tCONV = 65 ms typical)
10= +0.125°C (tCONV = 130 ms typical)
11= +0.0625°C (power-up default, tCONV = 250 ms typical)
1
0
2
0
3
1
4
1
5
6
7
8
1
0
2
0
3
0
4
0
5
1
6
0
7
8
0
1
0
2
0
3
0
4
0
5
0
6
0
7
8
1
SCL
A
C
K
A
C
K
A
C
K
A
2
A
1
A
0
S
W
0
SDA
1
P
Address Byte
Resolution Pointer
Data
MCP9808
MCP9808
MCP9808
FIGURE 5-8:
Timing Diagram for Changing TA Resolution to +0.0625°C <0000 0011>b (see
Section 4.0 “Serial Communication”).
© 2011 Microchip Technology Inc.
DS25095A-page 29
MICROCHIP [ MICROCHIP ]
