MC68HC912DG128 Datasheet, PDF (119/452 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Flash Memory
Programming the Flash EEPROM
START PROG
TURN ON V_FP
CLEAR MARGIN FLAG
CLEAR PROGRAM PULSE COUNTER (n_PP)
WRITE PPAGE
CLEAR ERAS
SET LAT
WRITE DATA
TO ADDRESS
SET ENPE
DELAY FOR DURATION
OF PROGRAM PULSE
(t_PPULSE)
CLEAR ENPE
DELAY BEFORE VERIFY
(t_VPROG)
SET
MARGIN FLAG
IS
MARGIN FLAG
SET?
NO
YES
INCREMENT
n_PP COUNTER
READ
LOCATION
DECREMENT
n_PP COUNTER
n_PP = 0?
NO
YES
DATA
CORRECT?
YES
CLEAR LAT
DATA
CORRECT?
NO
YES
n_PP = 50?
NO
YES
NO
LOCATION FAILED
TO PROGRAM
GET NEXT
ADDRESS/DATA
DONE?
NO
YES
TURN OFF V_FP
DONE PROG
Figure 7-1. Program Sequence Flow
MC68HC912DG128 — Rev 3.0
MOTOROLA
Flash Memory
For More Information On This Product,
Go to: www.freescale.com
Technical Data
119