DIR: The DIR pin decides the direction of motor spin; when driven
'High', the sequence is OUTA → OUTB →
OUTC, and when
driven 'Low' the sequence is OUTA → OUTC →
OUTB. DIR pin
input can be overwritten by configuring DIR_INPUT over the I2C
interface.
DRVOFF: When DRVOFF pin is
driven 'High', MCF8329A-Q1 turns off all external
MOSFETs by putting the gate drivers into the pull-down state. When DRVOFF is
driven 'Low', MCF8329A-Q1 returns to normal state of
operation, as if restarting the motor. DRVOFF does not cause the device to go to
sleep or standby mode; the digital core is still active.
SPEED/WAKE: The SPEED/WAKE
pin is used to control motor speed (or power or current or modulation index) and
wake up MCF8329A-Q1 from sleep mode. SPEED/WAKE pin
can be configured to accept PWM, frequency or analog control input signals. The
pin is used to enter and exit from sleep and standby mode.
EXT_CLK: The EXT_CLK
pin can be used to provide an external clock reference and in that case the
internal clock gets calibrated using the external clock.
FG: The FG pin provides pulses which are proportional
to motor speed (see Section 6.3.21).
nFAULT: The nFAULT pin provides fault status in
device or motor operation.