mpc89x54a Megawin Technology, mpc89x54a Datasheet - Page 13

• Manufacturer Part Number: mpc89x54a
• Description: 8-bit Micro-controller
• Manufacturer: Megawin Technology

Embedded Flash
There is totally 63 K bytes flash embedded in the MPC89x54A.
The leading 16 K bytes flash memory is designed for storage of the user program, and
followed 47 K bytes flash memory is shared with nonvolatile data flash and ISP program.
While the program counter of MPC89x54A is spanning over 3FFFh, the device will fetch its
program code from the external memory at once ignoring the /EA pin status. In that case, it will
never fetch the program code from the following embedded flash.
The user can develop the ISP program and put it into the embedded flash that addressed from
EC00h, F400h, or F800h by configuring OR0 [5:4]. Excluding the ISP program, the remained
flash spaces can be taken as data flash which can be read, even written by the application
program or the ISP program from the user.
MEGAWIN
MPC89x54A Data Sheet
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