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ADT7481ARMZ-1R7 Dual Channel Temperature Sensor and Overtemperature Alarm
Prototype PCB
Part No.:   ADT7481ARMZ-1R7
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Description:   Dual Channel Temperature Sensor and Overtemperature Alarm
File Size :   253 K    
Page : 20 Pages
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ADT7481
Consecutive ALERT Register
The value written to this register determines how many
out−of−limit measurements must occur before an ALERT is
generated. The default value is that one out−of−limit
measurement generates an ALERT. The maximum value
that can be chosen is 4.
The purpose of this register is to allow the user to perform
some filtering of the output. This is particularly useful at the
fastest three conversion rates, where no averaging takes
place. This register is at Address 0x22. This register has
other functions that are listed in Table 10.
Table 10. Consecutive ALERT Register Bit
Bit
7
Name
SCL
Timeout
Description
Set to 1, enables the SMBus SCL
timeout bit. Default = 0 = timeout
disabled. See the Serial Bus Interface
section for more information.
Set to 1 to enable the SMBus SDA
Timeout Bit. Default = 0 = Timeout
disabled. See the Serial Bus Interface
section for more information.
Setting this bit to 1 masks
ALERT
s
due to the local temperature
exceeding a programmed limit.
Default = 0.
Reserved for future use.
These bits set the number of
consecutive out−of−limit
measurements that have to occur
before an
ALERT
is generated.
000x = 1
001x = 2
011x = 3
111x = 4
6
SDA
Timeout
5
Mask Local
4
<3:0>
Res
Consecutive
ALERT
Table 11. List of Registers
Read
Address
(Hex)
N/A
00
01
01
02
03
04
05
06
07
07
08
08
N/A
10
10
11
11
12
12
13
13
14
14
19
19
20
Write
Address
(Hex)
N/A
N/A
N/A
N/A
N/A
09
0A
0B
0C
0D
0D
0E
0E
0F
(Note 1)
N/A
N/A
11
11
12
12
13
13
14
14
19
19
20
Address Pointer
Local Temperature Value
Remote 1 Temperature Value High Byte
Remote 2 Temperature Value High Byte
Status Register 1
Configuration Register 1
Conversion Rate/Channel Selector
Local Temperature High Limit
Local Temperature Low Limit
Remote 1 Temp High Limit High Byte
Remote 2 Temp High Limit High Byte
Remote 1 Temp Low Limit High Byte
Remote 2 Temp Low Limit High Byte
One−Shot
Remote 1 Temperature Value Low Byte
Remote 2 Temperature Value Low Byte
Remote 1 Temperature Offset High Byte
Remote 2 Temperature Offset High Byte
Remote 1 Temperature Offset Low Byte
Remote 2 Temperature Offset Low Byte
Remote 1 Temp High Limit Low Byte
Remote 2 Temp High Limit Low Byte
Remote 1 Temp Low Limit Low Byte
Remote 2 Temp Low Limit Low Byte
Remote 1 THERM Limit
Remote 2 THERM Limit
Local THERM Limit
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0101 0101 (0x55) (85°C)
0101 0101 (0x55) (85°C)
0101 0101 (0x55) (85°C)
Bit 3 Conf Reg = 0
Bit 3 Conf Reg = 1
Bit 3 Conf Reg = 0
Bit 3 Conf Reg = 1
Bit 3 Conf Reg = 0
Bit 3 Conf Reg = 1
Bit 3 Conf Reg = 0
Bit 3 Conf Reg = 1
Bit 3 Conf Reg = 0
Bit 3 Conf Reg = 1
Bit 3 Conf Reg = 0
Bit 3 Conf Reg = 1
Mnemonic
Power−On Default
Undefined
0000 0000 (0x00)
0000 0000 (0x00)
0000 0000 (0x00)
Undefined
0000 0000 (0x00)
0000 0111 (0x07)
0101 0101 (0x55) (85°C)
0000 0000 (0x00) (0°C)
0101 0101 (0x55) (85°C)
0101 0101 (0x55) (85°C)
0000 0000 (0x00) (0°C)
0000 0000 (0x00) (0°C)
Bit 3 Conf Reg = 0
Bit 3 Conf Reg = 1
Bit 3 Conf Reg = 0
Bit 3 Conf Reg = 1
Bit 3 Conf Reg = 0
Bit 3 Conf Reg = 1
Comment
Lock
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
N/A
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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