Filter
Top Products
995
Chapter 54 Flash Memory
3.Configuration
3.1 Address conversion from CPU Mode to Flash Programming Mode
Flash memory's address mapping is different depending on whether it is being accessed from the FR-CPU or
parallel Flash programmer
The following equations are an example to calculate a Flash programming mode address (FA) from a CPU
mode address (addr) for the 64bit flash type with a memory size of 1088kB (16x64kB + 8x8kB), as used on
MB91F467DA:
SA0, SA2, SA4, SA6 (14:0000h ≤ addr ≤ 14:FFFFh; addr[2]=0):
FA = addr - addr%00:4000h + (addr%00:4000h)/2 - (addr/2)%4 + addr%4 - 05:0000h
SA1, SA3, SA5, SA7 (14:0000h ≤ addr ≤ 14:FFFFh; addr[2]=1):
FA = addr - addr%00:4000h + (addr%00:4000h)/2 - (addr/2)%4 + addr%4 - 04:E000h
SA8, SA10, SA12, SA14, SA16, SA18, SA20, SA22 (04:0000h ≤ addr ≤ 13:FFFFh; addr[2]=0):
FA = addr - addr%02:0000h + (addr%02:0000h)/2 - (addr/2)%4 + addr%4 + 0C:0000h
SA9, SA11, SA13, SA15, SA17, SA19, SA21, SA23 (04:0000h ≤ addr ≤ 13:FFFFh; addr[2]=1):
FA = addr - addr%02:0000h + (addr%02:0000h)/2 - (addr/2)%4 + addr%4 + 0D:0000h
For other flash memory sizes or types please see the related datasheets.