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參數資料
| 型號： | M38C24M4A-XXXFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | 14 X 14 MM, 0.80 MM PITCH, PLASTIC, LQFP-64 |
| 文件頁數： | 61/102頁 |
| 文件大?。?/td> | 1369K |
| 代理商： | M38C24M4A-XXXFP |
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Rev.2.00
May 28, 2004
page 61 of 100
38C2 Group (A Version)
Software Commands
Table 12 lists the software commands.
After setting the CPU rewrite mode select bit to “1”, execute a soft-
ware command to specify an erase or program operation.
Each software command is explained below.
qRead Array Command (FF16)
The read array mode is entered by writing the command code “FF16”
in the first bus cycle. When an address to be read is input in one of
the bus cycles that follow, the contents of the specified address are
read out at the data bus (D0 to D7).
The read array mode is retained until another command is written.
qRead Status Register Command (7016)
When the command code “7016” is written in the first bus cycle, the
contents of the status register are read out at the data bus (D0 to D7)
by a read in the second bus cycle.
The status register is explained in the next section.
qClear Status Register Command (5016)
This command is used to clear the bits SR4 and SR5 of the status
register after they have been set. These bits indicate that operation
has ended in an error. To use this command, write the command
code “5016” in the first bus cycle.
qProgram Command (4016)
Program operation starts when the command code “4016” is written
in the first bus cycle. Then, if the address and data to program are
written in the 2nd bus cycle, program operation (data programming
and verification) will start.
Whether the write operation is completed can be confirmed by read
_____
status register or the RY/BY status flag. When the program starts,
the read status register mode is entered automatically and the con-
tents of the status register is read at the data bus (D0 to D7). The
status register bit 7 (SR7) is set to “0” at the same time the write
operation starts and is returned to “1” upon completion of the write
operation. In this case, the read status register mode remains active
until the read array command (FF16) is written.
Table 12 List of software commands (CPU rewrite mode)
The RY/BY status flag of the flash memory control register is “0”
during write operation and “1” when the write operation is completed
as is the status register bit 7.
At program end, program results can be checked by reading the sta-
tus register.
Fig. 64 Program flowchart
Command
Program
Clear status register
Read array
Read status register
X
First bus cycle
Second bus cycle
FF16
7016
5016
4016
Write
XSRD
Read
Write
(Note 1)
WA (Note 2)
WD (Note 2)
Block erase2016
Write
D016
Write
BA (Note 3)
Mode
Address
Mode
Address
Data
(D0 to D7)
(Note 4)
Notes 1: SRD = Status Register Data
2: WA = Write Address, WD = Write Data
3: BA = Block Address to be erased (Input the maximum address of each block.)
4: X denotes a given address in the User ROM area.
Cycle number
1
2
1
2
X
Data
Start
Write 4016
Read status register
Program
completed
NO
YES
Write address
Write data
SR4 = 0 ?
Program
error
NO
YES
SR7 = 1 ?
or
RY/BY = 1 ?
Write
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相關代理商/技術參數 |
參數描述 |
|---|---|
| M38C24M4-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38C24M4-XXXHP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38C24M6-051HP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38C24M6-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38C24M6-XXXHP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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