參數(shù)資料
型號(hào)： MB89F202YPFV
廠商： FUJITSU LTD
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 12.5 MHz, MICROCONTROLLER, PDSO34
封裝： 6.10 X 11 MM, 1.45 MM HEIGHT, 0.65 MM PITCH, PLASTIC, SSOP-34
文件頁(yè)數(shù)： 3/44頁(yè)
文件大?。?/td> 1225K
代理商： MB89F202YPFV
MB89202 Series
DS07-12561-2E
11
■ PROGRAMMING AND ERASE FLASH MEMORY
1.
Flash Memory
The flash memory is located between C000H and FFFFH in the CPU memory map and incorporates a flash
memory interface circuit that allows read access and program access from the CPU to be performed in the same
way as Mask ROM. Programming and erasing flash memory is also performed via the flash memory interface
circuit by executing instructions in the CPU. This enables the flash memory to be updated in place under the
control of the CPU, providing an efficient method of updating program and data.
2.
Flash Memory Features
16 Kbytes
× 8-bit configuration
Automatic programming algorithm (Embedded Algorithm)
Data polling and toggle bit for detection of program/erase completion
Detection of program/erase completion via CPU interrupt
Compatible with JEDEC-standard commands
No. of program / erase cycles: Minimum 10,000
3.
Procedure for Programming and Erasing Flash Memory
Programming and reading flash memory cannot be performed at the same time. Accordingly, to program or
erase flash memory, the program must first be copied from flash memory to RAM so that programming can be
performed without program access from flash memory.
4.
Flash Memory Control Status Register (FMCS)
5.
Memory Space
The memory space for the CPU access and for the flash programmer access is listed below.
6.
Flash Content Protection
Flash content can be read using parallel / serial programmer if the flash content protection mechanism is not
activated.
One predefined area of the flash (FFFCH) is assigned to be used for preventing the read access of flash content.
If the protection code “01H” is written in this address (FFFCH), the flash content cannot be read by any parallel/
serial programmer.
Note: The program written into the flash cannot be verified once the flash protection code is written (“01H” in FFFCH).
It is advised to write the flash protection code at last.
Part number
Memory size
CPU address
Programmer address
MB89F202
MB89F202Y
16 K bytes
FFFFH to C000H
INTE RDYINT
WE
RDY
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
R/W
R
Address
0079H
Initial value
000X----B
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