Answer Question #5 How much on chip SRAM Memory do we have in MC9S12Dx256 (2) Fa

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Answer Question #5 How much on chip SRAM Memory do we have in MC9S12Dx256 (2) Familiarize yourself with the attached Dragon12 User's Manual. You can obtain the latest version of this manual at the www.evbplus.com website. Now, by examining the manual we see that the Dragon12 board uses the MC9S12Dx256 microcontroller chip from Freescale, where x can be P,T,J, or G version. The manual also shows the memory map of the MC9S12Dx256 chip. Examining the memory map of MC9S12Dx256 under NORMAL SINGLE CHIP, we see the following: Address range used (S mean in hex) Reg Memory REGISTERS EEPROM RAM Flash ROM $0000 $03FF $0400 SOFFF $1000 $3FFF $4000 $FFFF The above addresses assignments are the defaults upon RESET and can be mapped into different locations. We use the above default addresses throughout the Labs. Answer the following questions: 1. Calculate the total memory space (in Bytes and Kbytes) assigned for each section of the above addresses other words, state which one is used for Code, Data, and scratch memory starting address upon Reset. starting address upon Reset address upon Reset. 2. Indicate the use of the EEPROM, SRAM, and Flash ROM in the controller. In 3. How much on-chip Flash memory do we have in the MC9S12Dx256? Give its 4. State the number of K bytes for address space of 4000H FFFFH 5. How much on-chip SRAM memory do we have in the MC9S12Dx256? Give its 6. How much on-chip EEPROM do we have in the MC9s12Dx256? Give its starting

Explanation / Answer

5) Starting address on reset value is 0x1000 (hex) for SRAM. In this microcontroller SRAM is RAM and the size is 0x4000-0x1000 = 12288 Memory locations.

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