mm908e626 Freescale Semiconductor, Inc, mm908e626 Datasheet - Page 15

• Manufacturer Part Number: mm908e626
• Description: Integrated Stepper Motor Driver With Embedded Mcu And Lin Serial Communication
• Manufacturer: Freescale Semiconductor, Inc

CURRENT LIMITATION FREQUENCY INPUT
TERMINAL (FGEN)
frequency. This input is not a real PWM input terminal; it
should just supply the period of the PWM. The duty cycle will
be generated automatically.
be in the range of 0.1 kHz to 20 kHz.
BACK ELECTROMAGNETIC FORCE OUTPUT
TERMINAL (BEMF)
electromagnetic force (BEMF). This feature allows stall
detection and coil failures in step motor applications. In order
to evaluate this signal the terminal must be directly connected
to terminal PTD0 / TACH0 / BEMF.
RESET TERMINAL (
It is an open drain with pullup resistor and must be connected
to the
INTERRUPT TERMINAL (
indicating errors or wake-up events. It is an open drain with
pullup resistor and must be connected to the
the MCU.
SLAVE SELECT TERMINAL (
analog chip. All other SPI connections are done internally.
must be connected to PTB1 or any other logic I /O of the
microcontroller.
LIN BUS TERMINAL (LIN)
transmitter and receiver. It is suited for automotive bus
systems and is based on the LIN bus specification.
HALF-BRIDGE OUTPUT TERMINALS (HB1: HB4)
configured as four half-bridge driver outputs. The HB1: HB4
outputs may be configured for step motor drivers, DC motor
drivers, or as high-side and low-side switches.
overtemperature protected, and they feature current recopy,
current limitation, and BEMF generation. Current limitation
and recopy are done on the low-side MOSFETs.
POWER SUPPLY TERMINALS (VSUP1: VSUP3)
nominal input voltage is designed for operation from 12 V
Analog Integrated Circuit Device Data
Freescale Semiconductor
Input terminal for the half-bridge current limitation PWM
Important The recommended FGEN frequency should
This terminal gives the user information about back
RST_A
IRQ_A
This terminal is the SPI Slave Select terminal for the
The LIN terminal represents the single-wire bus
The 908E626 device includes power MOSFETs
The HB1: HB4 outputs are short-circuit and
VSUP1: VSUP3 are device power supply terminals. The
RST
is the interrupt output terminal of the analog die
is the bidirectional reset terminal of the analog die.
terminal of the MCU.
RST_A
IRQ_A
)
SS
)
)
IRQ
terminal of
SS
systems. Owing to the low ON-resistance and current
requirements of the half-bridge driver outputs, multiple VSUP
terminals are provided.
functionality.
POWER GROUND TERMINALS (GND1 AND GND2)
Owing to the low ON-resistance and current requirements of
the half-bridge driver outputs multiple terminals are provided.
chip functionality.
SWITCHABLE V
resistive loads requiring a regulated 5.0 V supply; The output
is short-circuit protected.
+ 5.0 V VOLTAGE REGULATOR OUTPUT
TERMINAL (VDD)
to stabilize the regulated output voltage. The VDD terminal is
intended to supply the embedded microcontroller.
supply other loads; use the HVDD terminal for this purpose.
The VDD, EVDD, VDDA, and VREFH terminals must be
connected together.
VOLTAGE REGULATOR GROUND TERMINAL
(VSS)
of all non-power ground connections (microcontroller and
sensors).
must be connected together.
LIN TRANSCEIVER OUTPUT TERMINAL (RXD)
must be connected to the microcontroller’s Enhanced Serial
Communications Interface (ESCI) module (RXD terminal).
ADC REFERENCE TERMINALS (VREFL AND
VREFH)
the ADC. It is recommended that a high-quality ceramic
decoupling capacitor be placed between these terminals.
ADC and should be tied to the same potential as VDDA via
separate traces. VREFL is the low reference supply for the
ADC and should be tied to the same potential as VSS via
separate traces.
All VSUP terminals must be connected to get full chip
GND1 and GND2 are device power ground connections.
GND1 and GND2 terminals must be connected to get full
The HVDD terminal is a switchable V
The VDD terminal is needed to place an external capacitor
Important The VDD terminal should not be used to
The VSS terminal is the ground terminal for the connection
Important VSS, EVSS, VSSA, and VREFL terminals
This terminal is the output of LIN transceiver. The terminal
VREFL and VREFH are the reference voltage terminals for
Important VREFH is the high reference supply for the
For details refer to the 68HC908EY16 datasheet.
DD
FUNCTIONAL TERMINAL DESCRIPTION
OUTPUT TERMINAL (HVDD)
FUNCTIONAL DESCRIPTION
DD
output for driving
908E626
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