M30222 Datasheet, PDF (201/237 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
Parallel I/O Mode (Flash Memory Version)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Parallel I/O Mode
The parallel I/O mode inputs and outputs the software commands, addresses and data needed to oper-
ate (read, program, erase, etc.) the internal flash memory. Figure 1.160 shows the pin layout for flash
paralell mode. Table 1.77 is adescription of pin functions in paralell I/O mode.
Use an exclusive programmer supporting M30222 (flash memory version). Refer to the instruction
manual of each programmer make for the detail of use.
User ROM and Boot ROM Areas
In parallel I/O mode, the user ROM and boot ROM areas shown in Figure 1.149 can be rewritten. Both
areas of flash memory can be operated on in the same way.
Program and block erase operations can be performed in the user ROM area. The user ROM area and
its blocks are shown in Figure 1.149.
The boot ROM area is 8 Kbytes in size. In parallel I/O mode, it is located at addresses 07E00016
through 07FFF16. Make sure program and block erase operations are always performed within this
address range. (Access to any location outside this address range is prohibited.)
In the boot ROM area, an erase block operation is applied to only one 8 Kbyte block. The boot ROM
area has had a standard serial I/O mode control program stored in it when shipped from the Mitsubishi
factory. Therefore, using the device in standard serial input/output mode, you do not need to write to
the boot ROM area.
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