Function Image™ Loading Options
Q. I am about to start a design using one of your FirmASIC® based products, what is
the most suitable method of storing the associated Function Image™ in my project?
A. Our FirmASIC® based devices require a Function Image™ to configure their on-chip sub-systems.
This is a data file that is uploaded during device initialisation and defines the device's function and feature set.
The Function Image™ can be loaded automatically from external serial EEPROM via a dedicated SPI bus or from a host
µController over the built-in C-BUS serial interface.It is also possible with two specified memory devices to
update the serial memory stored Function Image™ via the C-BUS and SPI interface.
CML supplies a dedicated Thick Stub Function Image™ to enable this capability.
The linked flow diagram is an aide-memoir in that it makes it plain what is possible when choosing the most
suitable method of storing a Function Image™ for your project.
[Function Image™ Loading Options]
For CMX7032 FI-2.x
Q. The CMX7032 FI-2.x includes a NRESET pin, I understand that this allows the device to be fully
reset following a temporary loss of power (e.g. Brown Out Condition).
Is there a particular way to use this pin if I am using an external Serial memory to store the Function Image?
A. The hyperlinked pdf document [
CMX7032 Power-up and Reset] provides an illustration of how the NRESET can be used during a
Brown Out Condition.
It can be used at any time following an initial [power up sequence and Function Image load).
CML recommends the use of an external voltage supervisor IC if it is exposed to variable supplies
such as those found in automobile applications.
For 7032FI-1.x
Q. I am about to evaluate the 7032FI-1.x (AIS Data Processor) using the PE0201,
what recommendations can you give me?
A. Operation is straightforward when following the instructions in the user manuals and
FAQs, however a modest modification to the PE0201 is recommended.
The baseband signal requires a Tx-to-Rx channel with a relatively flat frequency response.
To achieve this with the PE0201 kit from the default build will require the removal and replacement
of certain capacitors.
Note: If evaluating the 7042FI-1.x with a PE0401 kit the same modifications should be made.
Q. I am intending to evaluate the CMX7032 FI using the PE0001 and PE0201 kits; can you help me interface my RF design to the PE0201 when using the CMX7032 FI?
A. Without a FI download the kit and therefore its I/O is not configured. However once a suitable FI is installed the CMX703x and hence the PE0201 is suitably configured. To help visualise what connections can be made to the PE0201 please refer to the image available via the following link: PE0201 Evaluation Kit
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