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2. Board Features
2.1
Block Diagram
2.2
SATA Switching
The AM450x features a SATA switching port device which enables the system to interconnect AMC port 2 or 3
to SATA drive port 0, which can be set automatically by the MMC. This makes it possible to design redundant
storage configurations for MicroTCA open modular platforms.
2.3
Redundant MMC Flash & FWUM
The MMC microcontroller runs a firmware from its internal 256KB flash. It is programmed by another
microcontroller named FWUM (FirmWare Update Manager). The FWUM keeps the last two copies of the MMC
firmware in dedicated flash memories. The FWUM act as a watchdog to the MMC and can rollback a firmware
update in the MMC in case of problems.
The FWUM itself is a microcontroller with internal flash to store MMC firmware image. Functions of this
microntroller is kept to a minimum. The FWUM firmware is field updatable.
Note:
The MMC and the FWUM have an internal hardware watchdog.
4
Board Features
AM450x User's Guide
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