tower system
Get to know the TWR-FRAM
Battery clip
(3V battery included) 256-Kb I
2
C Serial F-RAM
1-Mb SPI
Serial F-RAM
4-Mb Parallel
F-RAM
8-bit nonvolatile
GPIO State Saver
Primary (Functional)
Connections
256-Kb I
2
C RTC/
Processor Companion
256-Kb SPI RTC/
Processor Companion
256-Kb
l C TCXO/
Processor
Companion
2
Requires use with Tower System processor module and
elevator modules (TWR-ELEV) - sold separately
read me first
How to build your TWR-FRAM
3
Step 1
Download and install software from www.ramtron.com/go/TWR-FRAM.
Download Quick Start Guide and supporting files.
3
Step 2
Install 3V lithium battery on the TWR-FRAM board.
The clip is rigid; please use care when installing
the battery.
3
Step 3
Locate the Elevator Modules (sold separately),
identified by the four card-edge connections.
3
Step 4
Identify each Elevator Module as either Primary
Elevator (white connections) or Secondary Elevator (black connections).
3
Step 5
Plug primary connections side of the TWR-FRAM board to the Primary
Elevator. Place the TWR-FRAM in top position of the Elevator (see inset photo).
This provides easy access to the jumper pins.
3
Step 6
Identify the primary and secondary card edges of the Processor Module
(TWR-K53N512 or similar device) and any additional modules you add to
your tower system.
3
Step 7
Plug the primary card edge of each module into the Primary (functional) Elevator.
3
Step 8
Place the Secondary Elevator module onto the secondary card edges.
3
Step 9
Follow instructions in the Quick Start Guide.
Download software from www.ramtron.com/go/TWR-FRAM
tower system
3-pin jumper
3-pin jumper
TWR-FRAM Jumper Options
1 2 3
Jumper Option
J1
DSPI Voltage
1
The following tables show all jumper options available.
2 3
The
*default*
installed jumper settings are shown in the bold
with asterisks. The jumper pin positions are shown below:
4-pin jumper
4 3
1 2
4-pin jumper
4 3
1 2
3-pin jumper
6-pin jumper
6 5 4
1 2 3
1 2 3
J2
J32
J38
VTWR Voltage
FM33256B CS
FM25V10 CS
J8
SPI SCK
6-pin jumper
6 5 4
1 2 3
4-pin jumper
4 3
1 2
J10
SPI CS
J4
SPI MISO
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