ATA6830-PKHW Atmel, ATA6830-PKHW Datasheet - Page 9

• Manufacturer Part Number: ATA6830-PKHW
• Description: Motor / Motion / Ignition Controllers & Drivers IC Automotive for Headlamp Adjustment
• Manufacturer: Atmel
• Type: 2 Phase Stepper Motor Driverr

Specifications of ATA6830-PKHW

• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 7 V to 20 V
• Supply Current: 7 mA
• Mounting Style: SMD/SMT
• Package / Case: QFN-28
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

3.6
4575D–BCD–09/05
Power-up Sequence
After power-up the circuit has to be synchronized and a reference run has to be executed before
a position command can be carried out.
sary sequences follow each other.
Figure 3-7.
The first sequence is the synchronization sequence. Its pattern
sent at least 4 times to be sure that the following commands will be recognized. If there are dis-
tortions on the bus it is helpful to send this sequence more than 4 times. A RC lowpass filter at
the bus pin
After synchronization the stepping motor has to make the reference run to initialize its zero posi-
tion. The first reference run will only be executed if the circuit recognizes this command three
times in series. This function is implemented contributing to the importance of the reference run.
After the reference run the circuit will switch to normal operation. To perform a reference run dur-
ing normal operation, the command has to be sent only once.
state diagram for the implemented sequence processor.
POWER
UP
(Figure 8-1 on page
Necessary Commands after Power-up
MESSAGE
FRAME
1
SYNCHRONIZATION
SEQUENCE
2
20) helps to reduce distortions.
4
Figure 3-7
1
REFERENCE RUN
SEQUENCE
2
shows a timing diagram on how the neces-
Figure 3-8 on page 10
10
(Figure 3-4 on page
POSITION 1
POSITION 2
ATA6830
7) should be
shows the
9