M30222 Datasheet, PDF (185/237 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

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MITSUBISHI MICROCOMPUTERS
M30222 Group
Rev. G
Description (Flash Memory Version)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Flash Memory
The M30222 (flash memory version) has an internal new DINOR (Divided bit line NOR) flash memory
that can be rewritten with a single power source. Three flash memory modes are available that read,
program, and erase: parallel I/O and standard serial I/O modes that flash memory manipulates using a
programmer, and a CPU rewrite mode that flash memory can manipulate using the Central Processing
Unit (CPU). Each mode is detailed in the following pages.
The flash memory is divided into several block as shown in Figure 1.149 so that memory can be erased
one block at a time. Each block has a lock bit to enable or disable execution of an erase or program
operation, allowing data in each block to be protected.
In addition to the ordinary user ROM area to store a microcomputer operation control program, the flash
memory has a boot ROM area that is used to store a program to control rewriting in CPU rewrite and
standard serial I/O modes. This boot ROM area has had a standard serial I/O mode control program
stored in it when shipped from the factory. However, the user can write a rewrite control program in this
area that suits the users application system. This boot ROM area can be rewritten in only parallel I/O
mode.
Outline Performance
Table 1.74 shows the outline performance of the M30222 (flash memory version).
Table 1.74. Outline performance
Item
Erase/Write voltage
Flash memory operation mode
Erase block division
Program method
Erase method
User ROM area
Boot ROM area
Program/erase control method
Number of Commands
Program/erase count
ROM code protect
Performance
2.7 to 5.5V
Three modes: CPU rewrite, parallel I/O, standard serial
See Fig. 1.149
One division (8 Kbytes) (Note)
uses word units
Collective erase/block erase
Program/erase control by software command
8
100
Parallel I/O and standard serial modes are supported.
Note: The boot area contains a standard serial I/O control mode control program stored in it when it is
shipped from the factory. This area can be erassed and programmed in paralell I/O mode only.
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