AN1836 Motorola / Freescale Semiconductor, AN1836 Datasheet - Page 6

• Manufacturer Part Number: AN1836
• Description: FLASH Programming for Motorola MC68HC912 Microcontrollers
• Manufacturer: Motorola / Freescale Semiconductor

Application Note
Software Considerations
6
NOTE:
The M68HC12B32EVB is designed to be used for evaluation purposes
only and does not have sufficient protection against improper V
voltage levels for a production level system. Refer to
Protection Circuitry
information for proper circuit design and protection of the V
FLASH EEPROM in the MCU.
V
other masks, use 11.4–12.6 volts (12 volts 5%).
Using SDBUG12 to manipulate the FLASH EEPROM requires some
special considerations. First, a few bugs in some versions of the
software can cause confusion when manipulating the FLASH memory
array. The memory display windows sometimes do not refresh properly,
sometimes showing all of the odd addresses as one value and all the
even addresses as another value. To fix this problem, issue a RESET
command from the SDBUG12 command prompt to force SDBUG12 to
refresh all of its display windows from the MCU once the part comes out
of reset.
W7 JUMPER TO APPLY
FP
V
FP
should be 11.4–11.8 volts for mask sets 1H91F and 3H91F. For all
Figure 6. M68EVB912B32 Evaluation Board Connections
TO PIN.
V
FP
in this document for more detailed circuit
Example V
FP
MOTOROLA
pin and
FP
AN1836
FP