SNAS207B May 2004 – January 2024 LM64
PRODUCTION DATA
ADDRESS Hex |
Read/ Write |
Bits | POR Value |
Name | Description |
---|---|---|---|---|---|
02HEX ALERT STATUS REGISTER (8-bits) (All Alarms are latched until read, then cleared if alarm condition was removed at the time of the read.) | |||||
0x02 | Read Only | 7 | 0 | Busy | When this bit is a 0, the ADC is not
converting. When this bit is set to a 1, the ADC is performing a conversion. This bit does not affect ALERT status. |
6 | 0 | Local High Alarm |
When this bit is a 0, the internal temperature of
the LM64 is at or below the Local High Setpoint. When this bit is a 1, the internal temperature of the LM64 is above the Local High Setpoint, and an ALERT is triggered. |
||
5 | 0 | This bit is unused and always read as 0. | |||
4 | 0 | Remote High Alarm |
When this bit is a 0, the temperature of the
Remote Diode is at or below the Remote High Setpoint. When this bit is a 1, the temperature of the Remote Diode is above the Remote High Setpoint, and an ALERT is triggered. |
||
3 | 0 | Remote Low Alarm |
When this bit is a 0, the temperature of the
Remote Diode is at or above the Remote Low Setpoint. When this bit is a 1, the temperature of the Remote Diode is below the Remote Low Setpoint, and an ALERT is triggered. |
||
2 | 0 | Remote Diode Fault Alarm |
When this bit is a 0, the Remote Diode appears to
be correctly connected. When this bit is a 1, the Remote Diode may be disconnected or shorted. This Alarm does not trigger an ALERT. |
||
1 | 0 | Remote T_CRIT Alarm |
When this bit is a 0, the temperature of the
Remote Diode is at or below the T_CRIT Limit. When this bit is a 1, the temperature of the Remote Diode is above the T_CRIT Limit, and an ALERT is triggered. |
||
0 | 0 | Tach Alarm | When this bit is a 0, the Tachometer count is
lower than or equal to the Tachometer Limit (the RPM of the fan is
greater than or equal to the minimum desired RPM). When this bit is a 1, the Tachometer count is higher than the Tachometer Limit (the RPM of the fan is less than the minimum desired RPM), and an ALERT is triggered. |
||
16HEX ALERT MASK REGISTER (8-bits) | |||||
16 | R/W | 7 | 1 | This bit is unused and always read as 1. | |
6 | 0 | Local High Alarm Mask |
When this bit is a 0, a Local High Alarm event
will generate an ALERT. When this bit is a 1, a Local High Alarm will not generate an ALERT |
||
5 | 1 | This bit is unused and always read as 1. | |||
4 | 0 | Remote High Alarm Mask |
When this bit is a 0, Remote High Alarm event will
generate an ALERT. When this bit is a 1, a Remote High Alarm event will not generate an ALERT. |
||
3 | 0 | Remote Low Alarm Mask |
When this bit is a 0, a Remote Low Alarm event
will generate an ALERT. When this bit is a 1, a Remote Low Alarm event will not generate an ALERT. |
||
2 | 1 | This bit is unused and always read as 1. | |||
1 | 0 | Remote T_CRIT Alarm Mask |
When this bit is a 0, a Remote T_CRIT event will
generate an ALERT. When this bit is a 1, a Remote T_CRIT event will not generate an ALERT. |
||
0 | 0 | Tach Alarm Mask |
When this bit is a 0, a Tach Alarm event will
generate an ALERT. When this bit is a 1, a Tach Alarm event will not generate an ALERT. |