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MCP9804-E/MS データシート(PDF) 29 Page - Microchip Technology

部品番号 MCP9804-E/MS
部品情報  짹0.25째C Typ. Accuracy Digital Temperature Sensor
PDF  54 Pages
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メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP9804-E/MS データシート(HTML) 29 Page - Microchip Technology

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© 2009 Microchip Technology Inc.
DS22203A-page 29
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).
FIGURE 5-9:
Timing Diagram for Changing TA Resolution to 0.0625°C <0000 0011>b (See
Section 4.0).
REGISTER 5-7:
RESOLUTION
→ 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 7-3
Unimplemented: Read as ‘0’
bit 2-0
Resolution:
00
= LSB = 0.5°C (tCONV = 30 ms typical)
01
= LSB = 0.25°C (tCONV = 65 ms typical)
10
= LSB = 0.125°C (tCONV = 130 ms typical)
11
= LSB = 0.0625°C (power up default, tCONV = 250 ms typical)
SDA
A
C
K
00
1
1
A
A
C
K
S
2
A
1
A
0
12
3
4
5
6
7
8
1
2
3
4
5
678
SCL
Address Byte
W
MCP9804
MCP9804
A
C
K
P
12
3
4
567
8
Data
Resolution Pointer
MCP9804
00
0
0
1
00
0
0
0
0
0
0
01
1



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