Overview Of 256-Kbit Flash Memory - Fujitsu F2MC-8FX Hardware Manual

CHAPTER 28 256-KBIT FLASH MEMORY
28.1

Overview of 256-Kbit Flash Memory

The following methods can be used to program (write) and erase data into/from flash
memory:
• Programming/erasing using a parallel programmer
• Programming/erasing using a dedicated serial programmer
• Programming/erasing by program execution
This section describes "programming/erasing by program execution".
Overview of 256-Kbit Flash Memory
256-Kbit flash memory is located from 8000
flash memory interface circuit provides read access and program access from the CPU to flash memory.
As flash memory can be programmed and erased by the instructions from the CPU via the flash memory
interface circuit, you can efficiently reprogram (update) program code and data in flash memory with the
device mounted on a circuit board.
Features of 256-Kbit Flash Memory
• Sector configuration: 32K bytes × 8 bits
• Automatic program algorithm (Embedded Algorithm)
• Detection of completion of programming/erasing using the data polling or toggle bit function
• Detection of completion of programming/erasing by CPU interrupts
• Compatible with JEDEC standard command
• Programming/erase count (minimum): 10,000 times
Programming and Erasing Flash Memory
• It is not possible to write to and read from the flash memory at the same time.
• To program/erase data into/from a bank in flash memory, execute the one copied from the flash memory
to RAM, so that writing to the flash memory can be performed.
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to FFFF on the CPU memory map. The function of the
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