ATA6830-PKHW Atmel, ATA6830-PKHW Datasheet - Page 7

• 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

4575D–BCD–09/05
Figure 3-4.
Between two commands a pause has to be included. This is necessary for a clear recognition of
a new message frame (command).
Figure 3-5.
Every command consists of 16 bits. They will be sent with two bytes.
sage frame. The high byte is sent first, immediately followed by the low byte. Every byte starts
with a start bit and ends with a parity bit and a stop bit. The first start bit (level 0) after a pause
(level 1) indicates the beginning of a new message frame. The value of the parity bit has to be
odd, i.e., the crossfooting of the byte including the parity bit is odd. If a data packet is not recog-
nized due to a transmission error (parity error), the entire command is rejected.
Figure 3-6.
START
START
BIT
BIT
HIGH BYTE LOW BYTE
MESSAGE FRAME
Synchronization Sequence
Message Frame and Space
Command Bits
7
6
5
8 DATA
HIGH BYTE
4
BITS
3
2
Figure 3-5
1
SYNCHRONIZATION PATTERN
0
PARITY
PARITY
BIT
MESSAGE FRAME
BIT
STOP
STOP
SPACE
BIT
BIT
shows the timing diagram of two commands.
START
START
BIT
BIT
7
6
5
8 DATA
LOW BYTE
4
BITS
3
Figure 3-6
2
1
0
PARITY
PARITY
BIT
ATA6830
BIT
shows the mes-
STOP
STOP
BIT
BIT
7