MC68HC908GP20 Datasheet, PDF (179/406 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Smart Programming Algorithm
Page Program/Margin Read Procedure
Note: This algorithm is mandatory for programming the FLASH.
Note: This page program algorithm assumes the page/s
to be programmed are initially erased.
PROGRAM FLASH
INITIALIZE ATTEMPT
COUNTER TO 0
INCREMENT ATTEMPT COUNTER
SET PGM BIT AND FDIV BITS
READ FLASH BLOCK
PROTECT REGISTER
WRITE DATA TO SELECTED PAGE
SET HVEN BIT
WAIT t_PROG
CLEAR HVEN BIT
WAIT t_HVTV
SET MARGIN BIT
WAIT t_VTP
CLEAR PGM BIT
WAIT t_HVD
MARGIN READ PAGE OF DATA
CLEAR MARGIN BIT
N
ATTEMPT COUNT
EQUAL TO
FLSPULSES?
Y
PROGRAMMING OPERATION
FAILED
N
MARGIN READ DATA
EQUAL TO
WRITE DATA?
Y
PROGRAMMING OPERATION
COMPLETE
Figure 11-2. Smart Programming Algorithm
MC68HC908GP20 — Rev 2.1
Freescale Semiconductor
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