Overview Of 3M-Bit Flash Memory - Fujitsu F2MC-16LX Hardware Manual
16-bit microcontroller mb90330 series
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Also See for F2MC-16LX:
- Hardware manual (598 pages) ,
- Application note (13 pages) ,
- Operation manual (10 pages)
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CHAPTER 25 3M-BIT FLASH MEMORY
25.1
Overview of 3M-bit Flash Memory
The 3M flash memory is allocated from F9 to FF banks on the CPU memory map and
can be read-accessed and program-accessed from the CPU using the function of the
flash memory interface circuit. Writing/erasing on flash memory can be executed by the
instructions from the CPU through the flash memory interface circuit. Additionally,
rewriting can be executed in the mounted condition by the control of the built-in CPU,
the effective improvement of the program and data are realized.
Features of 3M-bit Flash Memory
3M-bit flash memory has the following features.
• 384K words × 8/192K words × 16 bits (64K × 5 + 32K + 8K × 2 + 16K) sector configuration
• Uses automatic program algorithm (Embedded Algorithm
• Erase pause/restart function
• Detection of completion of writing/erasing by data polling and toggle bit.
• Detection of completion of writing/erasing by CPU interrupts.
• Erase per sector enabled (random sector combination)
• Programming/erase count 10,000 (min.)
• Sector protect function (Possibility that sets up with a recommendation parallel writer)
*: Embedded Algorithm
Method for Writing/deleting Flash Memory
Programming and erasing flash memory cannot be performed at one time. In other words, to perform
writing/erasing data on flash memory, it possible to execute writing operation by copying the program on
the flash memory on RAM and executing from RAM, without program-accessing from the flash memory.
Flash Memory Control Status Register (FMCS)
Figure 25.1-1 shows the bit configuration of the flash memory control status register (FMCS) used in the
flash memory.
Figure 25.1-1 Bit Configuration of Flash Memory Control Status Register (FMCS)
Address: 0000AE
564
TM
is a registered trademark of Advanced Micro Devices, Inc.
7
6
Bit No.
INTE
RDYINT
H
R/W
R/W
Read/Write
TM
5
4
3
2
LPM1
WE
RDY
Reserved
Reserved
W
R/W
R
R/W
*: the same manner as MBM29LV400TC.
1
0
FMCS
LPM0
Initial value
W
R/W
000X0000
B
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