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Chapter 23
Flash Memory Controller (FMC)
23.1 Introduction
NOTE
For the chip-specific implementation details of this module's
instances, see the chip configuration information.
The Flash Memory Controller (FMC) is a memory acceleration unit that provides:
• an interface between the device and the nonvolatile memory.
• buffers that can accelerate flash memory transfers.
23.1.1 Overview
The Flash Memory Controller manages the interface between the device and the flash
memory. The FMC receives status information detailing the configuration of the memory
and uses this information to ensure a proper interface. The following table shows the
supported read/write operations.
Flash memory type
Read
Write
Program flash memory
8-bit, 16-bit, and 32-bit reads
—
1. A write operation to program flash memory results in a bus error.
The FMC has a 32-bit interface to the device. The flash memory has a 2-bank structure,
with independent lower and upper banks (both banks are 64-bits wide). The FMC has 2
separate 64-bit interfaces to the flash memory, with one 64-bit interface to each bank.
In addition, the FMC provides 2 separate mechanisms for accelerating the interface
between the device and the flash memory. A 64-bit speculation buffer can prefetch the
next 64-bit flash memory location, and a shared 4-way, 4-set cache can store previously
accessed flash memory data for quick access times.
K32 L2A Reference Manual, Rev. 2, 01/2020
NXP Semiconductors
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Содержание K32 L2A Series
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