ADT7408CCPZ-R2 AD [Analog Devices], ADT7408CCPZ-R2 Datasheet - Page 10

• Manufacturer Part Number: ADT7408CCPZ-R2
• Description: +-2 C Accurate, 12-Bit Digital Temperature Sensor
• Manufacturer: AD [Analog Devices]

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
Not
Applicable
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08 to 0x0F
MSB
D15
RFU
Table 7. Capability Mode Description
Bit
D0
Alarm/Critical Trips
D1
Higher Precision
D2
Wider Range
[D4:D3]
Temperature Resolution
[D15:D5]
D14
RFU
Manufacturer ID
Name
Address Pointer
Capability Register
Configuration Register
Alarm Temperature
Alarm Temperature
Critical Temperature
Temperature Value
Device ID/Revision
Vendor-Defined
D13
RFU
Register
Upper Boundary
Trip Register
Lower Boundary
Trip Register
Trip Register
Register
Register
Register
Registers
D12
RFU
Reserved for future use; must be 0
Function
Basic capability
D0
1
Accuracy
D1
0
Wider range
D2
1
Temperature resolution
[D4:D3]
01
11
D11
RFU
D10
RFU
Power-On
Default
0x00
0x001D
0x0000
0x0000
0x0000
0x0000
Undefined
0x11D4
0x080X
0x0000
Trips Capability
Alarm and critical trips capability
Accuracy Capability
Default accuracy ±2°C over the active range and ±3°C over the monitor range
Temperature Range Capability
Can read temperature below 0°C and set sign bit accordingly (default)
Temperature Resolution
0.25°C LSB
0.0625°C LSB (default)
D9
RFU
D8
RFU
Read/Write
Write
Read
Read/Write
Read/Write
Read/Write
Read/Write
Read
Read
Read
Reserved
D7
RFU
Rev. 0 | Page 10 of 24
D6
RFU
D5
RFU
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
D7
0
Table 6. Address Pointer Selected Registers
D2
0
0
0
0
1
1
1
1
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.
D4
TRES1
D1
0
0
1
1
0
0
1
1
D6
0
D0
0
1
0
1
0
1
0
1
D3
TRES0
D5
0
Alarm Temperature Upper Boundary Trip
Register Selected
Capability Register
Configuration Register
Alarm Temperature Lower Boundary Trip
Critical Temperature Trip Register
Temperature Value Register
Manufacturer ID Register
Device ID/Revision Register
D4
0
Register
Register
D2
Wider
range
D3
Register
select
D1
Higher
precision
D2
Register
select
D1
Register
select
LSB
D0
Alarm/Critical
trips
LSB
D0
Register
select