DS1683_12 Datasheet, PDF (11/21 Pages) Maxim Integrated Products – Total-Elapsed-Time and Event Recorder with Alarm

DS1683
Total-Elapsed-Time and Event Recorder with Alarm
REGISTER 00h: COMMAND REGISTER
Factory Default/Power-On Value
Read Access
Write Access
Memory Type
00h
All
All
SRAM, Volatile
Memory
Access
00h
N/A
Reserved
BIT 7
N/A
Reserved
N/A
Reserved
N/A
Reserved
N/A
Reserved
N/A
Reserved
N/A
Reserved
R/W
CLR ALM
BIT 0
7:1
Reserved Reserved
Clear Alarm Bit. This bit reads as a 0. Writing this bit to a 1 unlatches the active ALARM output, set-
0
CLR ALM ting the ALARM pin to its inactive state if the alarm condition is no longer present. If the alarm condi-
tion persists, the ALARM pin once again asserts to its active state.
REGISTER 01h: STATUS REGISTER
Factory Default /Power-On Value
Read Access
Write Access
Memory Type
00h
All
N/A
SRAM, Volatile
Memory
Access
01h
N/A
Reserved
BIT 7
N/A
Reserved
N/A
Reserved
R/W
Reserved
R/W
Reserved
R/W
EVENT
R/W
EVENT AF
R/W
ETC AF
BIT 0
7:3
Reserved Reserved
2
EVENT This bit indicates the status of the EVENT pin’s logic level, detected after the t_G glitch filter time.
Default value = 0. If the value in the Event Counter SRAM value is greater than or equal to the Event
1
EVENT AF
Counter Alarm Limit value, then this bit is automatically set to a value of 1 to indicate an ALARM
event. When the EVENT SRAM Counter value is less than the Event Counter Alarm Limit, this bit
automatically set to a value of 0, indicating that there is no EVENT alarm.
Default value = 0. If the value in the ETC SRAM value is greater than or equal to the ETC Alarm Limit
0
ETC AF
value, then this bit is automatically set to a value of 1 to indicate an ALARM event. When the ETC
SRAM value is less than the ETC Alarm Limit, this bit automatically set to a value of 0, indicating that
there is no ETC alarm.
Maxim Integrated
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