MAX1668/MAX1805/MAX1989
†
Multichannel Remote/Local
Temperature Sensors
14 ______________________________________________________________________________________
Table 5. Configuration Byte Bit Assignments
Table 7. Status Byte 2 Bit Assignments
Table 6. Status Byte Bit 1 Assignments
Note: All flags in this byte stay high until cleared by POR or until the status byte is read.
FUNCTION
7 (MSB) MASKALL 0 Masks all ALERT interrupts when high.
6 RUN/STOP 0
Standby mode control bit. If high, the device immediately stops converting and
enters standby mode. If low, the device converts.
5 MASK4* 0 Masks remote DX4 interrupts when high.
4 MASK3* 0 Masks remote DX3 interrupts when high.
3 MASK2 0 Masks remote DX2 interrupts when high.
2 MASK1 0 Masks remote DX1 interrupts when high.
0 IBIAS1 0 M ed i um /l ow - b i as contr ol b i t. H i g h = l ow b i as, l ow = m ed i um b i as. IBIAS 0 m ust b e l ow .
1 IBIAS0 0 High-bias control bit. High bias on DXP_ when high. Overrides IBIAS1.
BIT NAME FUNCTION
7 (MSB) BUSY A high indicates that the ADC is busy converting.
6 LHIGH
†
A high indicates that the local high-temperature alarm has activated.
5 LLOW
†
A high indicates that the local low-temperature alarm has activated.
4 OPEN
†
A high indicates one of the remote-diode continuity (open-circuit) faults.
3 ALARM
†
A high indicates one of the remote-diode channels has over/undertemperature alarm.
2 N/A N/A
1 N/A N/A
0 N/A N/A
BIT NAME FUNCTION
7 (MSB) RLOW1 A high indicates that the DX1 low-temperature alarm has activated.
6 RHIGH1 A high indicates that the DX1 high-temperature alarm has activated.
5 RLOW2 A high indicates that the DX2 low-temperature alarm has activated.
4 RHIGH2 A high indicates that the DX2 high-temperature alarm has activated.
3 RLOW3* A high indicates that the DX3 low-temperature alarm has activated.
2 RHIGH3* A high indicates that the DX3 high-temperature alarm has activated.
1 RLOW4* A high indicates that the DX4 low-temperature alarm has activated.
0 RHIGH4* A high indicates that the DX4 high-temperature alarm has activated.
*Not available for MAX1805.
†
These flags stay high until cleared by POR, or until the status byte register is read.
*Not available for MAX1805.
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