m37753ffchp Mitsumi Electronics, Corp., m37753ffchp Datasheet - Page 35

• Manufacturer Part Number: m37753ffchp
• Description: Single Chip 16 Bit Cmos Microcomputer Flash Memory Version
• Manufacturer: Mitsumi Electronics, Corp.

Auto erase command
When writing “30
ter, the flash memory control circuit executes the auto erase se-
quence described below for the area specified beforehand by the
erase/program area select bits.
The auto erase/erase/program busy flag of the flash memory control
register becomes “1" when auto erase starts, and becomes “0" when
auto erase completes. Accordingly, CPU can recognize the comple-
tion of auto erase by polling this bit.
During auto erase, watchdog timer stops with “FF
Note: When the flash memory is erased by using the auto erase
DC electric characteristics
Note: The characteristic of the flash memory part are the same as
AC electric characteristics
Note: The characteristics are the same as the standards of the mi-
(2) The erasure is executed.
(3) The contents of the erased flash memory is erase-verified one by
(1) Data “00
(4) When the erasure of all areas specified to be erased, is con-
one. When the address which is not erased is found, verification
is interrupted, and after the erase command is executed again,
erase-verification is operated again.
firmed by erase-verify-operation, the auto erase command is
ended.
memory.
crocomputer mode.
command, it is unnecessary to execute the erase and erase
verify commands. Figure 25 shows the flowchart when auto
erase is executed.
the standard of the parallel I/O mode.
16
" is written to the area to be erased in the flash
16
” twice continuously to the flash command regis-
16
SHINGLE-CHIP 16-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION
” set.
Reset command
The reset command is a command to discontinue the program,
erase, or the auto erase command on the way. When “FF
ten to the command register two times continuously after “40
“20
gram, erase, or auto erase command becomes invalid (reset), and
the M37753FFCFP and the M37753FFCHP enters the reset mode.
The contents of the memory does not change even if the reset com-
mand is executed.
Fig. 25 Flowchart when program/erase/auto erase is executed (2)
16
,” or “30
16
Auto erase
” is written to the flash command register, the pro-
NO
MITSUBISHI MICROCOMPUTERS
WRITE AUTO-ERASE
WRITE AUTO-ERASE
ERASE PROGRAM
BUSY FLAG = 0
COMMAND
COMMAND
NOP
PASSED
DEVICE
START
YES
10
M37753FFCHP
M37753FFCFP
30
30
16
16
16
” is writ-
16
35
,”