AN1836 Motorola / Freescale Semiconductor, AN1836 Datasheet - Page 27

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

Other FLASH Hardware Device Considerations
AN1836
MOTOROLA
NOTE:
The diode D1 shown in
greater than .35 volts to maintain the proper V
relationship at all times. Diodes such as the 1N5818 or 1N5819 will work
and typically have even lower voltage drops at low current.
Some hardware facts and details are worth mentioning here.
For instance, the M68HC12 Family uses a 1.5T FLASH technology. For
a more detailed description of this and other NVM technologies, refer to
the application note Non-Volatile Memory Technology Overview,
Motorola document order number AN1837/D.
Without getting into the level of detail provided in that document, the
practical side of some hardware considerations is included here. Topics
Figure 13. V
through BDM Interface
Figure 13
FP
Supplied from External Source
Other FLASH Hardware Device Considerations
must have a forward bias drop of no
FP
to V
DD
voltage
Application Note
27