AMC6821 Datasheet, PDF (41/47 Pages) Burr-Brown (TI) – Analog Monitor and Control Circuit

AMC6821
www.ti.com
SBAS386A – MAY 2006 – REVISED MAY 2006
Remote-Temp-DATA-HByte Register (Address 0x0B, Value After Power-On or Reset = 0x80, –128°C)
Bit 7 (MSB)
RT10 (MSB)
Bit 6
RT9
Bit 5
RT8
Bit 4
RT7
Bit 3
RT6
Bit 2
RT5
Bit 1
RT4
Bit 0 (LSB)
RT3
Bits [RT10:RT3] are the eight MSBs of the newest remote temperature reading.
It is important to note that temperature can be read as an 8-bit value (with 1°C resolution) from the
Temp-DATA-Hbyte register, or as an 11-bit value (with 0.125°C resolution) from the Temp-DATA-LByte and
Temp-DATA-HByte registers. If only 1°C resolution is required, the temperature readings can be read back at
any time and in no particular order. If the 11-bit measurement is required, this involves a two-register read for
each measurement. The Temp-DATA-LByte register (0x06) should be read first. This condition causes all
temperature reading registers to be frozen until the Remote-Temp-DATA-HByte Register (0x0B) is read. This
architecture also prevents an MSB reading from being updated while the 3LSBs are being read, and vice versa.
TEMPERATURE LIMIT REGISTERS
Local High Temperature Limit Register: [LT-H10:LT-H0]
Local Low Temperature Limit Register: [LT-L10:LT-L0]
Local-High-Temp-Limit Register (Address 0x14, Value After Power-On or Reset = 0x3C, +60°C)
Bit 7 (MSB)
LT-H10 (MSB)
Bit 6
LT-H9
Bit 5
LT-H8
Bit 4
LT-H7
Bit 3
LT-H6
Bit 2
LT-H5
Bit 1
LT-H4
Bit 0 (LSB)
LT-H3
These bits are the upper bounds of the local temperature. Bits [LT-H2:LT-H0] are always '0'.
Local-Low-Temp-Limit Register (Address 0x15, Value After Power-On or Reset = 0x00, 0°C)
Bit 7 (MSB)
LT-L10 (MSB)
Bit 6
LT-L9
Bit 5
LT-L8
Bit 4
LT-L7
Bit 3
LT-L6
Bit 2
LT-L5
Bit 1
LT-L4
Bit 0 (LSB)
LT-L3
These bits are the lower bounds of the local temperature. Bits [LT-L2:LT-L0] are always '0'.
Local-THERM-Limit Register (Address 0x16, Value After Power-On or Reset = 0x46, +70°C)
Bit 7 (MSB)
LT-T10 (MSB)
Bit 6
LT-T9
Bit 5
LT-T8
Bit 4
LT-T7
Bit 3
LT-T6
Bit 2
LT-T5
Bit 1
LT-T4
Bit 0 (LSB)
LT-T3
These bits are the thermal threshold of the local temperature. Bits [LT-T2:LT-T0] are always '0'.
Remote-High-Temp-Limit Register (Address 0x18, Value After Power-On or Reset = 0x50, +80°C)
Bit 7 (MSB)
RT-H10 (MSB)
Bit 6
RT-H9
Bit 5
RT-H8
Bit 4
RT-H7
Bit 3
RT-H6
Bit 2
RT-H5
Bit 1
RT-H4
Bit 0 (LSB)
RT-H3
These bits are the upper bounds of the remote temperature. Bits [RT-H2:RT-H0] are always '0'.
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