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908E626 Datasheet, PDF (16/38 Pages) Freescale Semiconductor, Inc – Integrated Stepper Motor Driver with Embedded MCU and LIN Serial Communication
FUNCTIONAL DESCRIPTION
FUNCTIONAL TERMINAL DESCRIPTION
ADC SUPPLY TERMINALS (VDDA AND VSSA)
VDDA and VSSA are the power supply terminals for the
analog-to-digital converter (ADC). It is recommended that a
high-quality ceramic decoupling capacitor be placed between
these terminals.
Important VDDA is the supply for the ADC and should be
tied to the same potential as EVDD via separate traces.
VSSA is the ground terminal for the ADC and should be tied
to the same potential as EVSS via separate traces.
For details refer to the 68HC908EY16 datasheet.
MCU POWER SUPPLY TERMINALS (EVDD AND
EVSS)
EVDD and EVSS are the power supply and ground
terminals. The MCU operates from a single power supply.
Fast signal transitions on MCU terminals place high, short-
duration current demands on the power supply. To prevent
noise problems, take special care to provide power supply
bypassing at the MCU.
For details refer to the 68HC908EY16 datasheet.
TEST TERMINAL (FLSVPP)
This terminal is for test purposes only. This terminal should
be either left open (not connected) or connected to GND.
EXPOSED PAD TERMINAL
The exposed pad terminal on the bottom side of the
package conducts heat from the chip to the PCB board. For
thermal performance the pad must be soldered to the PCB
board. It is recommended that the pad be connected to the
ground potential.
908E626
16
Analog Integrated Circuit Device Data
Freescale Semiconductor