Atmel SAM4L-EK Atmel ATSAM4L-EK ATSAM4L-EK Data Sheet
Product codes
ATSAM4L-EK
262
42023E–SAM–07/2013
ATSAM4L8/L4/L2
14. Flash Controller (FLASHCALW)
Rev: 1.1.0.1
14.1
Features
•
Controls on-chip flash memory
•
Supports 0 and 1 wait state bus access
•
Flash Read-Standby mode to achieve very low power flash operation
•
Unified direct mapped PicoCache to minimize flash active power and improve performance
•
32-bit HSB interface for reads from flash and writes to page buffer
•
32-bit PB interface for issuing commands to and configuration of the controller
•
32-bit HSB interface for reads and writes to the PicoCache RAM when it is disabled
•
Flash memory is divided into 16 regions that can be individually protected or unprotected
•
Supports reads and writes of general-purpose Non Volatile Memory (NVM) bits
•
Supports reads and writes of additional NVM pages
•
Supports strong device protection
14.2
Overview
The Flash Controller (FLASHCALW) interfaces the on-chip flash memory with the 32-bit internal
HSB bus. The controller manages the reading, writing, erasing, locking, and unlocking
sequences. To minimize power consumption, the module is tigthly coupled to a direct mapped
cache resulting in a significant decrease of the flash active power consumption and also in a per-
formance increase when running with one wait state.
HSB bus. The controller manages the reading, writing, erasing, locking, and unlocking
sequences. To minimize power consumption, the module is tigthly coupled to a direct mapped
cache resulting in a significant decrease of the flash active power consumption and also in a per-
formance increase when running with one wait state.