
MC33989
17
MC33989
Figure 7. Simplified schematic for Flash programming
4.11
Package and thermal consideration
The device is proposed in a standard surface mount SO28 package. In order to improve the thermal performances of the
SO28 package, 8 pins are internally connected to the lead frame and are used for heat transfer to the printed circuit board.
SBC
MCU = Flash
Vdd1
reset
Wdogb
External supply and sources applied to Vdd1, reset
and Wdogb test points on application circuit board.
Vsup (open or >5V
Simplified connection used in Flash programming mode
Programming bus
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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