參數(shù)資料
型號: ADT7463
廠商: Analog Devices, Inc.
英文描述: dB COOL Remote Thermal Controller and Voltage Monitor
中文描述: 分貝超酷的遠(yuǎn)程熱控制器和電壓監(jiān)視器
文件頁數(shù): 18/53頁
文件大小: 719K
代理商: ADT7463
REV. 0
–18–
ADT7463
LIMITS, STATUS REGISTERS, AND INTERRUPTS
Limit Values
Associated with each measurement channel on the ADT7463
are high and low limits. These can form the basis of system
status monitoring: a Status bit can be set for any out-of-limit
condition and detected by polling the device. Alternatively,
SMBALERT
interrupts can be generated to flag a processor or
microcontroller of out-of-limit conditions.
8-Bit Limits
The following is a list of 8-bit limits on the ADT7463:
Voltage Limit Registers
Reg. 0x44
2.5 V Low Limit
= 0x00 default
Reg. 0x45
2.5 V High Limit
= 0xFF default
Reg. 0x46
V
CCP
Low Limit
= 0x00 default
Reg. 0x47
V
CCP
High Limit
= 0xFF default
Reg. 0x48
V
CC
Low Limit
= 0x00 default
Reg. 0x49
V
CC
High Limit
= 0xFF default
Reg. 0x4A
5 V Low Limit
= 0x00 default
Reg. 0x4B
5 V High Limit
= 0xFF default
Reg. 0x4C
12 V Low Limit
= 0x00 default
Reg. 0x4D
12 V High Limit
= 0xFF default
Temperature Limit Registers
Reg. 0x4E
Remote 1 Temp Low Limit
= 0x81 default
Reg. 0x4F
Remote 1 Temp High Limit
= 0x7F default
Reg. 0x6A
Remote 1
THERM
Limit
= 0x64 default
Reg. 0x50
Local Temp Low Limit
= 0x81 default
Reg. 0x51
Local Temp High Limit
= 0x7F default
Reg. 0x6B
Local
THERM
Limit
= 0x64 default
Reg. 0x52
Remote 2 Temp Low Limit
= 0x81 default
Reg. 0x53
Remote 2 Temp High Limit
= 0x7F default
Reg. 0x6C
Remote 2
THERM
Limit
= 0x64 default
Therm Limit Register
Reg. 0x7A
THERM
Limit
= 0x00 default
16-Bit Limits
The Fan TACH measurements are 16-bit results. The Fan
TACH limits are also 16 bits, consisting of a High Byte and
Low Byte. Since fans running under speed or stalled are nor-
mally the only conditions of interest, only High Limits exist for
Fan TACHs. Since fan TACH period is actually being mea-
sured, exceeding the limit indicates a slow or stalled fan.
Fan Limit Registers
Reg. 0x54
TACH1 Minimum Low Byte
= 0xFF default
Reg. 0x55
TACH1 Minimum High Byte
= 0xFF default
Reg. 0x56
TACH2 Minimum Low Byte
= 0xFF default
Reg. 0x57
TACH2 Minimum High Byte
= 0xFF default
Reg. 0x58
TACH3 Minimum Low Byte
= 0xFF default
Reg. 0x59
TACH3 Minimum High Byte
= 0xFF default
Reg. 0x5A
TACH4 Minimum Low Byte
= 0xFF default
Reg. 0x5B
TACH4 Minimum High Byte
= 0xFF default
Out-of-Limit Comparisons
Once all limits have been programmed, the ADT7463 can be
enabled for monitoring. The ADT7463 will measure all param-
eters in round-robin format and set the appropriate Status bit
for out-of-limit conditions. Comparisons are done differently
depending on whether the measured value is being compared to
a high or low limit.
HIGH LIMIT: > COMPARISON PERFORMED
LOW LIMIT: < OR = COMPARISON PERFORMED
NO
INT
LOW LIMIT
TEMP >
LOW LIMIT
Figure 17. Temperature > Low Limit: No
INT
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