M30222 Datasheet, PDF (190/237 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

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Specifications in this manual are tentative and subject to change
MITSUBISHI MICROCOMPUTERS
M30222 Group
Rev. G
CPU Rewrite Mode (Flash Memory Version)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Table 1.75. List of software commands (CPU rewrite mode)
Commands (Note 1)
Cycle
No.
Read
1
ID Codes
2
Status Regiser Read
2
Status Register Clear
1
Word Program
2
Auto Block Erase
2
Erase
2
(Erase all unlocked blocks)
2
Lock Bit Status Read
2
Lock Bit Program
2
1st Bus Cycle
Mode
Write
Write
Write
Write
Write
Write
Write
Write
Write
Write
Address
X (Note 5)
X
X
X
X
X
X
X
X
X
Data
(D7:D0)
FFh
90h
70h
50h
40h
20h
20h
A7h
71h
77h
Mode
Read
Read
Write
Write
Write
Write
Read
Write
2nd Bus Cycle
Address
Data
(D7:D0)
IA
ID
X
SRD (Note 2)
WA (Note 3)
BA (Note 4)
X
X
BA (Note 4)
BA (Note 4)
WD (Note 3)
D0h
20h
D0h
(D6)(Note 6)
D0h
Note 1: When a software command is input, the high-order byte of data (D15:D8) is ignored.
Note 2: SRD = Status Register Data
Note 3: WA = Write Address, WD = Write Data (16 bits)
Note 4: BA = Block Address (Enter the maximum address of each block that is an even address)
Note 5: X denotes a given even address in the user ROM.
Note 6: Lock bit output on Data bit 6
Software Commands
Table 1.75 lists the software commands available with the M30222 (flash memory version).
After setting the CPU rewrite mode select bit to 1, write a software command to specify an erase or
program operation. Note that when entering a software command, the upper byte (D8 to D15) is ig-
nored. The content of each software command is explained below.
Read Array Command (FF16)
The read array mode is entered by writing the command code "FF16" in the first bus cycle. When an even address
to be read is input in one of the bus cycles that follow, the content of the specified address is read out at the data
bus (D0 –D15), 16 bits at a time. The read array mode is retained intact until another command is written.
Read Status Register Command (7016)
When the command code "7016" is written in the first bus cycle, the content of the status register is read out at the
data bus (D0–D7) by a read in the second bus cycle.
The status register is explained in the next section.
Clear Status Register Command (5016)
This command is used to clear the error bits 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.
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