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MCP9804 データシート(PDF) 28 Page - Microchip Technology

部品番号 MCP9804
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 データシート(HTML) 28 Page - Microchip Technology

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MCP9804
DS22203A-page 28
© 2009 Microchip Technology Inc.
5.1.5
DEVICE ID AND REVISION
REGISTER
The upper byte of this register is used to specify the
device identification and the lower byte is used to
specify device revision. The device ID for the MCP9804
is 0x02 (hex).
The revision begins with 0x00 (hex) for the first release,
with the number being incremented as revised versions
are released.
FIGURE 5-8:
Timing Diagram for Reading Device ID and Device Revision Register (See Section 4.0).
REGISTER 5-6:
DEVICE ID AND DEVICE REVISION (READ-ONLY)
→ ADDRESS ‘0000 0111’b
R-0
R-0
R-0
R-0
R-0
R-0
R-1
R-0
Device ID
bit 15
bit 8
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
Device Revision
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 15-8
Device ID: Bit 15 to bit 8 are used for device ID
bit 7-0
Device Revision: Bit 7 to bit 0 are used for device revision
SDA
A
C
K
00
1
1
A
Device ID Pointer
00
0
0
A
C
K
S
2
A
1
A
0
12
3
4
5
6
7
8
1
2
3
4
5
678
SCL
0
Address Byte
A
C
K
00
1
1
A
MSB Data
A
C
K
N
A
K
S
P
2
A
1
A
0
12
3
4
5
6
7
8
1
2
3
4
5
678
12
3
4
5
67
8
Address Byte
LSB Data
R
MCP9804
MCP9804
MCP9804
Master
Master
W
SDA
SCL
11
1
00
1
0
0
00
1
00
0
0
0
00
0
Note:
It is not necessary to
select
the
register
pointer if it was set from
the previous read/write.



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