ADT7408CCPZ-REEL7 데이터 시트보기 (PDF) - Analog Devices
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ADT7408CCPZ-REEL7 Datasheet PDF : 24 Pages
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ADT7408
REGISTERS
The ADT7408 contains 16 accessible registers, shown in Table 5.
The address pointer register is the only register that is eight bits;
the other registers are 16 bits wide. On power-up, the address
pointer register is loaded with 0x00 and points to the capability
register.
Table 5. Registers
Pointer
Address
Name
Not
Address Pointer
Applicable Register
0x00
Capability Register
0x01
Configuration Register
0x02
Alarm Temperature
Upper Boundary
Trip Register
0x03
Alarm Temperature
Lower Boundary
Trip Register
0x04
Critical Temperature
Trip Register
0x05
Temperature Value
Register
0x06
Manufacturer ID
Register
0x07
Device ID/Revision
Register
0x08 to 0x0F Vendor-Defined
Registers
Power-On
Default
0x00
0x001D
0x0000
0x0000
0x0000
0x0000
Undefined
0x11D4
0x080X
0x0000
Read/Write
Write
Read
Read/Write
Read/Write
Read/Write
Read/Write
Read
Read
Read
Reserved
ADDRESS POINTER REGISTER (WRITE ONLY)
This 8-bit write only register selects which of the 16-bit registers
is accessed in subsequent read/write operations. Address space
between 0x08 and 0x0F is reserved for factory usage.
MSB
LSB
D7 D6 D5 D4 D3
D2
D1
D0
0
0 0 0 Register Register Register Register
select select select select
Table 6. Address Pointer Selected Registers
D2 D1 D0 Register Selected
0 0 0 Capability Register
0 0 1 Configuration Register
0 1 0 Alarm Temperature Upper Boundary Trip
Register
0 1 1 Alarm Temperature Lower Boundary Trip
Register
1 0 0 Critical Temperature Trip Register
1 0 1 Temperature Value Register
1 1 0 Manufacturer ID Register
1 1 1 Device ID/Revision Register
CAPABILITY REGISTER (READ ONLY)
This 16-bit, read-only register indicates the capabilities of the
thermal sensor, as shown in Table 7 and the following bit map.
Note that RFU means reserved for future use.
MSB
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2
RFU RFU RFU RFU RFU RFU RFU RFU RFU RFU RFU TRES1 TRES0 Wider
range
D1
Higher
precision
LSB
D0
Alarm/Critical
trips
Table 7. Capability Mode Description
Bit
Function
D0
Basic capability
Alarm/Critical Trips
D0
Trips Capability
1
Alarm and critical trips capability
D1
Accuracy
Higher Precision
D1
Accuracy Capability
0
Default accuracy ±2°C over the active range and ±3°C over the monitor range
D2
Wider range
Wider Range
D2
Temperature Range Capability
1
Can read temperature below 0°C and set sign bit accordingly (default)
[D4:D3]
Temperature resolution
Temperature Resolution [D4:D3] Temperature Resolution
01
0.25°C LSB
11
0.0625°C LSB (default)
[D15:D5]
Reserved for future use; must be 0
Rev. 0 | Page 10 of 24
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