PCA9629PW,118 NXP Semiconductors, PCA9629PW,118 Datasheet - Page 29

• Manufacturer Part Number: PCA9629PW,118
• Description: Motor / Motion / Ignition Controllers & Drivers I2C-bus Stepper motor controller
• Manufacturer: NXP Semiconductors
• Type: Stepper Motor Controllerr

Specifications of PCA9629PW,118

• Rohs: yes
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 4.5 V to 5.5 V
• Supply Current: 6 mA
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-16
• Factory Pack Quantity: 2500

NXP Semiconductors
PCA9629
Product data sheet
7.4 Motor coil excitation
7.5 Power-on reset
7.6 RESET input
Initially, after a power-up of the device, when the motor is started for the first time, the first
coil that is energized is OUT0 (if the motor is turning in the clockwise direction), or OUT3
(if the motor is turning in the counter clockwise direction). This very first step (after a
power-up) is not counted towards the number steps the motor is required to move (it is the
reference step). All subsequent steps are all counted. This applies only for the very first
time the motor is started after the device is powered up.
For all subsequent starting of the motor, the first coil that is energized is the same coil
where it had stopped. For example, consider the motor running in clockwise direction in
the one-phase drive mode. If the last coil that was energized before the motor stopped
was OUT2, then when the motor is started again OUT2 is energized first and after the
pulse width time elapses the next coil in sequence, that is, OUT3 is energized.
When power is applied to V
a reset condition until V
and the PCA9629 registers and state machine initialize to their default states. The
power-on reset typically completes the reset and enables the part by the time the power
supply is above V
supply, it is necessary to lower it below 2 V typical.
Remark: The system level reset pulse should be > 4 s for the chip to guarantee reset
condition.
A reset can be accomplished by holding the RESET pin LOW for a minimum of t
PCA9629 registers and I
RESET input is once again HIGH. The RESET input has a 200 k internal pull-up to V
pin.
The maximum wait time after RESET pin is released is 1 ms (typical).
All information provided in this document is subject to legal disclaimers.
POR
. However, when it is required to reset the part by lowering the power
Rev. 1 — 29 February 2012
DD
2
C-bus state machine are held in their default state until the
has reached V
DD
, an internal Power-On Reset (POR) holds the PCA9629 in
POR
. At that point, the reset condition is released
Fm+ I
2
C-bus stepper motor controller
PCA9629
© NXP B.V. 2012. All rights reserved.
w(rst)
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. The
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