M16C User Manual.pdf

Appendix Parallel I/O Mode (Flash Memory Version)Mitsubishi microcomputersM16C / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTERParallel I/O ModeIn this mode, the M16C/62 (flash memory version) operates in a manner similar to the flash memoryM5M29FB/T800 from Mitsubishi. Since there are some differences with regard to the functions not availablewith the microcomputer and matters related to memory capacity, the M16C/62 cannot be programedby a programer for the flash memory.Use an exclusive programer supporting M16C/62 (flash memory version).Refer to the instruction manual of each programer maker for the details of use.User ROM and Boot ROM AreasIn parallel I/O mode, the user ROM and boot ROM areas shown in Figure 1.28.1 can be rewritten. Bothareas 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 itsblocks are shown in Figure 1.28.1.The boot ROM area is 8 Kbytes in size. In parallel I/O mode, it is located at addresses 0FE00016 through0FFFFF16. Make sure program and block erase operations are always performed within this addressrange. (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 areahas 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 bootROM area.252