MC68HC908RK2 Datasheet, PDF (33/158 Pages) Motorola, Inc – Microcontroller Unit

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.
FLASH 2TS Memory
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
INCREMENT ATTEMPT COUNTER
N
ATTEMPT COUNT
EQUAL TO
fls_Pulses?
Y
PROGRAMMING OPERATION
FAILED
N
MARGIN READ DATA
EQUAL TO
WRITE DATA?
Y
CLEAR MARGIN BIT
CLEAR INTERRUPT MASK:
CLI INSTRUCTION
PROGRAMMING OPERATION
COMPLETE
Figure 2-4. Smart Programming Algorithm Flowchart
MC68HC908RK2 Data Sheet, Rev. 5.1
Freescale Semiconductor
33