ATA6830-PKHW Atmel, ATA6830-PKHW Datasheet - Page 8

• 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

3.5
Table 3-1.
8
Bus Command
Synchronization
Reference run (extend)
Reference run (retract)
New position (0 = full extension)
New position (0 = full retraction)
New position
(testmode, 0 = full extension)
New position
(testmode, 0 = full retraction)
Bus Commands
ATA6830
Bus Commands
There are different commands for controlling the stepping motor.
implemented commands and their meanings. The first command, the synchronization sequence,
is described above. The second group of commands are the reference commands. A reference
run command causes the stepping motor to make an initial run. It is used to establish a defined
start position for the following position commands. The way the reference run is executed will be
described later. There are two reference run commands. The difference is the turn direction of
the stepping motor. This makes the circuit more flexible for different applications. The turn direc-
tion is coded in the 4 identifier bits.
The last class of commands are the position commands. Every new position will be sent as an
absolute value. This makes the transmission more safe in terms of losing a position command.
The next received command tells the stepping motor the right position again. For the position
data there are 10 bits available (D0 to D9).
The maximum possible step count to be coded with 10 bit is 1024. Though position commands
up to 1024 will be executed, it´s prohibited to use values higher than 698, as this is the step
count of the reference run. For details see chapter “Reference Run”.
There are 4 new position commands. They differ in the identifier and in the modus bits. The
identifier fixes the turn direction. For test purposes there are new position commands with a dif-
ferent mode. In this mode the stepping motor works with a reduced coil current. This may be
used for end tests in the production of the application.
Any command with modus or identifier different to the first reference run will be ignored. Thus it
is also not possible to change modus or identifier by performing a second reference run.
D8
D8
D8
D8
7
1
0
0
Data
D9
D9
D9
D9
6
0
0
0
5
1
0
0
0
0
1
1
Mode
High Byte
4
0
0
0
0
0
1
1
3
1
1
0
1
0
1
0
Identifier
2
0
0
1
0
1
0
1
1
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
D0
D0
D0
D0
7
1
0
0
D1
D1
D1
D1
6
0
0
0
D2
D2
D2
D2
5
1
0
0
Table 3-1
Low Byte
D3
D3
D3
D3
4
0
0
0
Data
D4
D4
D4
D4
3
1
0
0
shows a list of all
D5
D5
D5
D5
2
0
0
0
4575D–BCD–09/05
D6
D6
D6
D6
1
1
0
0
D7
D7
D7
D7
0
0
0
0