MC908KX2MDWE Datasheet, PDF(35/210 Page) Freescale Semiconductor, Inc – High-performance M68HC08 architecture, Fully upward-compatible object code with M6805, M146805, and M68HC05 Families

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MC908KX2MDWE Datasheet, PDF (35/210 Pages) Freescale Semiconductor, Inc – High-performance M68HC08 architecture, Fully upward-compatible object code with M6805, M146805, and M68HC05 Families

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FLASH Program/Read Operation

Algorithm for programming

1

a row (32 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

Notes:

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

12

or the time between the last FLASH address programmed

to clearing PGM bit (step 7 to step 10)

must not exceed the maximum programming

13

time, tPROG maximum.

This row program algorithm assumes the row/s

to be programmed are initially erased.

WAIT FOR A TIME, tNVH

CLEAR HVEN BIT

WAIT FOR A TIME, tRCV

END OF PROGRAMMING

Figure 2-4. FLASH Programming Flowchart

MC68HC908KX8 â¢ MC68HC908KX2 â¢ MC68HC08KX8 Data Sheet, Rev. 2.1

Freescale Semiconductor

35

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