32186 datasheet(186/1032 Pages) RENESAS

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INTERNAL MEMORY

6-44

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

6.7 Virtual Flash Emulation Function

The microcomputer has the function to map 8-Kbyte memory blocks of the internal RAM (maximum for 32185 is

4 blocks, for 32186 is 8 blocks) into areas (L banks) of the internal flash memory that are divided in 8-Kbyte units.

This functions is referred to as the Virtual Flash Emulation Function.

This is the function allows shift from the contents of internal flash memory at the addresses specified by the

Virtual Flash L Bank Register to the data located in 8-Kbyte blocks of the internal RAM. That way, the relevant

RAM data can read out by reading the content of internal flash memory.

For applications that require modifying the contents of internal flash memory (e.g., data table) during operation, this

function enables dynamic data modification by modifying the relevant internal RAM data.

The internal RAM blocks allocated for virtual flash emulation can be accessed for read and write the same way as in

usual internal RAM.

This function, when used in combination with the microcomputer’s internal Real-Time Debugger (RTD), allows the

data table, etc. created in the internal flash memory to be referenced or rewritten from the outside, thereby facilitat-

ing data table tuning from an external device.

Note: • Before programming/erasing the internal flash memory, always be sure to exit this virtual flash

emulation mode.

6.7 Virtual Flash Emulation Function

Figure 6.7.1 Internal RAM Bank Configuration of the 32185

H'0080 4000

H'0080 5FFF

H'0080 6000

H'0080 7FFF

H'0080 8000

H'0080 A000

H'0080 BFFF

H'0080 9FFF

RAM bank L block 0

(FELBANK0)

8 Kbytes

RAM bank L block 1

(FELBANK1)

8 Kbytes

RAM bank L block 2

(FELBANK2)

8 Kbytes

RAM bank L block 3

(FELBANK3)

8 Kbytes

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