FM6124 Ramtron Corporation, FM6124 Datasheet - Page 11

• Manufacturer Part Number: FM6124
• Description: Event Data Recorder With F-ram
• Manufacturer: Ramtron Corporation

Event Recorder with Timestamp
The main feature of the FM6124 is its event recording
capability. The FM6124 can monitor events occurring on
each of its 12 digital input pins. When an event occurs the
Event is recorded into the Event Buffer F-RAM memory
along with current the timestamp. The recorded event data
is retrieved through I
The FM6124 is a highly integrated part able to operate in
standalone mode and requiring a few external components
to operate.
Dedicated F-RAM for Event Recording
Based on profiles set by the user, Events are recorded in
nonvolatile F-RAM memory. Each event is timestamped
automatically. A programmable amount of nonvolatile
storage is available to record events (25%, 50%, 75% or
100%). Event recording is triggered by pin state changes.
Events will be recorded in a circular buffer unless emptied
by the host.
A host processor can download the Event log at any time
via the I
as the input pins and the RTC can be read directly through
the serial interface.
Event Definition
An Event is defined as either a rising or a falling transition
occurring on any given input pin. Each one of the input
pin can be individually configured to react on a rising edge
or a falling edge.
Two registers located at addresses 0x23 and 0x24 allow
one to individually configure each one of the FM6124
Input pin to trigger an event recording on either a Low to
High or a High to Low transition
Rev. 4.0 (EOL)
July 2010
•
•
2
C interface. In addition the various resources such
Setting the corresponding bit to 1 will trigger an
Event recording on a Low to High transition
Setting the corresponding bit to 0 will trigger an
Event recording on a High to Low transition
F
IGURE
11. E
2
C mapped registers.
VENT TYPE SUPPORTED
Simultaneous transitions on distinct input pins configured
to react to these transitions will be considered as distinct
events and they will be recorded as such.
The recording order of simultaneous events will be related
to the input numbering.
simultaneously on IN0, IN1, IN7 and IN10, the first event
recorded will be the one occurring on IN0 followed by the
one on IN1 then IN7 and IN10.
When simultaneous events occur, it is possible that the
timestamp recorded varies by 1 second.
Event Timestamp Content
Each time an event is recorded, the following parameters
are saved in the nonvolatile Event buffer:
F
IGURE
F
12. E
IGURE
VENT DETECTION AND STORAGE INTO
13. E
VENT
For example, if events occur
T
IMESTAMP CONTENT
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F-RAM