MC908MR16CFUE Datasheet, PDF(42/282 Page) Freescale Semiconductor, Inc – On-chip programming firmware for use with host personal computer, Clock generator module (CGM)

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MC908MR16CFUE Datasheet, PDF (42/282 Pages) Freescale Semiconductor, Inc – On-chip programming firmware for use with host personal computer, Clock generator module (CGM)

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Memory

ALGORITHM FOR PROGRAMMING

1

A ROW (64 BYTES) OF FLASH MEMORY

2

SET PGM BIT

READ THE FLASH BLOCK PROTECT REGISTER

3

WRITE ANY DATA TO ANY FLASH ADDRESS

WITHIN THE ROW ADDRESS RANGE DESIRED

4

WAIT FOR A TIME, tNVS

5

SET HVEN BIT

6

WAIT FOR A TIME, tPGS

7

WRITE DATA TO THE FLASH ADDRESS

TO BE PROGRAMMED

8

WAIT FOR A TIME, tPROG

COMPLETED

YES

PROGRAMMING

THIS ROW?

NO

10

CLEAR PGM BIT

11

WAIT FOR A TIME, tNVH

Note:

The time between each FLASH address change (step 7 to step 7), or

12

the time between the last FLASH address programmed

CLEAR HVEN BIT

to clearing PGM bit (step 7 to step 10)

must not exceed the maximum programming

time, tPROG max.

13

WAIT FOR A TIME, tRCV

This row program algorithm assumes the row/s

to be programmed are initially erased.

END OF PROGRAMMING

Figure 2-4. FLASH Programming Flowchart

MC68HC908MR32 â¢ MC68HC908MR16 Data Sheet, Rev. 6.1

42

Freescale Semiconductor

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