mc68hc916y3 Freescale Semiconductor, Inc, mc68hc916y3 Datasheet - Page 205

• Manufacturer Part Number: mc68hc916y3
• Description: Mc68hc16y3 16 Bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

9.4.5.1 Programming Sequence
MC68HC16Y3/916Y3
USER’S MANUAL
Use the following procedure to program the TPUFLASH. Refer to Figures A-36 and
A-37 in APPENDIX A ELECTRICAL CHARACTERISTICS for V
ships during programming. Figure 9-1 is a flowchart of the TPUFLASH programming
operation.
1. Turn on V
2. Clear ERAS and set LAT and VFPE bits in TFCTL to set program mode, enable
3. Write new data to the desired address. This causes the address and data of the
4. Set ENPE to apply programming voltage.
5. Delay long enough for one programming pulse to occur (t
6. Clear ENPE to remove programming voltage.
7. Delay while high voltage is turning off (t
8. Read the location just programmed. If the value read is all zeros, proceed to
9. If the location is programmed, calculate t
10. Clear VFPE and LAT.
11. If there are more locations to program, repeat steps 2 through 10.
12. Turn off V
13. Read the entire array to verify that all locations are correct. If any locations are
programming address and data latches, and invoke special verification read cir-
cuitry. Set initial value of t
location to be programmed to be latched in the programming latches.
step 9. If not, calculate a new value for t
either the location is verified or the total programming time (t
exceeded. If t
not be used.
If the location does not remain programmed, the location is bad.
incorrect, the TPUFLASH array is bad.
FPE1K
FPE1K
Freescale Semiconductor, Inc.
progmax
For More Information On This Product,
(apply program/erase voltage to V
(reduce voltage on V
TPU FLASH EEPROM MODULE
has been exceeded, the location may be bad and should
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ppulse
to t
pmin
FPE1K
.
ppulse
vprog
pmargin
pin to V
).
and repeat steps 4 through 7 until
and repeat steps 4 through 7.
FPE1K
DD
).
pin).
ppulse
FPE
progmax
to V
).
DD
MOTOROLA
) has been
relation-
9-5