MC68HC908RF2 Datasheet, PDF (52/254 Pages) Motorola, Inc – HCMOS Microcontroller Unit

FLASH 2TS Memory
Advance Information
52
Page Program/Margin Read Procedure
Note: This algorithm is mandatory for
programming the FLASH 2TS.
Note: This page program algorithm
assumes the page/s to be programmed
are initially erased.
PROGRAM FLASH 2TS
SET INTERRUPT MASK:
SEI INSTRUCTION
INITIALIZE ATTEMPT COUNTER
TO 0
SET PGM BIT AND FDIV BITS
READ FLASH BLOCK PROTECT REG.
WRITE DATA TO
SELECTED PAGE
SET HVEN BIT
WAIT t_STEP
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
INCREMENT ATTEMPT COUNTER
MARGIN READ DATA
EQUAL TO
WRITE DATA?
N
ATTEMPT COUNT
EQUAL TO
fls_Pulses?
Y
Y
CLEAR MARGIN BIT
CLEAR INTERRUPT MASK:
CLI INSTRUCTION
PROGRAMMING OPERATION
FAILED
PROGRAMMING OPERATION
COMPLETE
Figure 4-2. Smart Programming Algorithm Flowchart
FLASH 2TS Memory
MC68HC908RF2 — Rev. 1
MOTOROLA