MC33989PEG Freescale Semiconductor, MC33989PEG Datasheet - Page 27

• Manufacturer Part Number: MC33989PEG
• Description: SBC-HS
• Manufacturer: Freescale Semiconductor

MCU FLASH PROGRAMMING CONFIGURATION
by an external power supply to 5.0 V; the reset and WD outputs by external signal sources are forced to zero or 5.0 V, both
without damage. This allows, for example, supply of the complete application board by external power supply, applying the
correct signal to reset pins. No function of the SBC is operating.
not be forced to a value above 5.0 V. The Reset pin is periodically pulled low for RST
to V
PACKAGE AND THERMAL CONSIDERATION
SOIC28 package, eight pins are internally connected to the lead frame and are used for heat transfer to the printed circuit board.
sequence described in the Debug mode paragraph.
Analog Integrated Circuit Device Data
Freescale Semiconductor
To download software into the application memory (MCU EEPROM or Flash) the SBC capabilities allows the V
Due to pass transistor from VDD1 to VSUP, supplying the device from VDD1 pin biases the VSUP pin. Therefore, V
The device is proposed in a standard surface mount SOIC28 package. In order to improve the thermal performances of the
Table 6
DD1
for 350 ms typical. During the time reset is low, the reset pin sinks 5.0 mA maximum (L
describes the SBC operation modes. Normal, Stand-by, and Stop Debug modes are entered through special
VSUP (Open or > 5.0 V
Figure 12. Simplified Schematic for Flash Programming
SBC
External supply and sources applied to
and WD test points on application circuit board.
VDD1
RST
WD
RESET AND WATCHDOG PINS, SOFTWARE WATCHDOG OPERATIONS
V
DD1 , RST,
MCU = Flash
DUR
time (3.4 ms typical) before being pulled
FUNCTIONAL DEVICE OPERATION
PDW
Programming Bus
parameter).
DD1
to be forced
SUP
should
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