UM0851 Datasheet, PDF (144/245 Pages) STMicroelectronics – SPEAr is a family of highly customizable ARM-based embedded

Non-volatile memory device drivers
Figure 37. The interface between NOR Flash and SMI controller
UM0851
SMI clock
prescaler
SMI data
processing and control
SMI
controller
Clock
Data,
command,
Bank select
Serial NOR
Flash
Data,
Status
5.3.2
Software overview
The NOR device driver sits on top of the SMI controller and provides all necessary functions
for a file system via the standard Linux MTD interface. In the SPEAr platform, SMI controller
is dedicated to serial NOR Flash only. Therefore separate APIs for controlling the SMI are
not available. The NOR device driver controls the functionality of SMI by directly accessing
the SMI registers.
144/245
Doc ID 16604 Rev 2