9s08ac128 ppage

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9s08ac128 ppage

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evkuchevkuch
Contributor I

Good day! I have (9s08ac128), usbdm 4.12.1 and memory dump, Prompt please Referring I should specify the address for the correct reading of the chip so that later I could write a new chip? I have read datasheet, but still do not understand ...

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lama
NXP TechSupport
NXP TechSupport

Hi,

The memory machine recognizes whether to use PPAGE_OFFSET decoding mechanism on the basis of the offset range. If the offset is 8000~BFFF (memory window, see Figure 8. Complete 9S08 Memory Map in http://cache.nxp.com/assets/documents/data/en/application-notes/AN3730.pdf) the final address is internally created as (PPAGE<<14) | (OFFSET & 0x3FFF).

So the address range to get or store memory is PPAGE = 0x00~0x07 OFFSET = 0x8000~0xBFFF

Best regards,

Ladislav

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