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MCP9808 数据表(PDF) 29 Page - Microchip Technology

部件名 MCP9808
功能描述  짹0.5째C Maximum Accuracy Digital Temperature Sensor
PDF  52 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

MCP9808 数据表(HTML) 29 Page - Microchip Technology

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© 2011 Microchip Technology Inc.
DS25095A-page 29
MCP9808
5.1.6
RESOLUTION REGISTER
This register allows the user to change the sensor
resolution
(see
Section 5.2.4
“Temperature
Resolution”).
The
POR
default
resolution
is
+0.0625°C. The selected resolution is also reflected in
the Capability register (see Register 5-2).
FIGURE 5-8:
Timing Diagram for Changing TA Resolution to +0.0625°C <0000 0011>b (see
Section 4.0 “Serial Communication”).
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
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-2
Unimplemented: Read as ‘0’
bit 1-0
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)
SDA
A
C
K
001
1
A
A
C
K
S
2
A
1
A
0
123
4
5
6
7
8
1
2
345
6
7
8
SCL
Address Byte
W
MCP9808
MCP9808
A
C
K
P
12
3
4
567
8
Data
Resolution Pointer
MCP9808
00
00
1
00
0
0
0
0
0
0
01
1



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