Multichannel remote/local temperature sensors – Rainbow Electronics MAX1989 User Manual
Page 14
MAX1668/MAX1805/MAX1989
†
Multichannel Remote/Local
Temperature Sensors
14
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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.
BIT
NAME
POR
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.