参数资料
型号: AS5245 DB
厂商: ams
文件页数: 21/32页
文件大小: 0K
描述: BOARD DEMO AS5245
标准包装: 1
传感器类型: 磁性,旋转位置
传感范围: 360°
接口: USB
电源电压: 5V USB 或 9V
嵌入式: 是,MCU,8 位
已供物品: 板,线缆
已用 IC / 零件: AS5245
AS5245
Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
9.2 Alignment Mode
The alignment mode simplifies centering the magnet over the center of the chip to gain maximum accuracy.
Alignment mode can be enabled with the falling edge of CSn while PDIO = logic high (see Figure 13) . The Data bits D11-D0 of the SSI change to
a 12-bit displacement amplitude output. A high value indicates large X or Y displacement, but also higher absolute magnetic field strength. The
magnet is properly aligned, when the difference between highest and lowest value over one full turn is at a minimum.
Under normal conditions, a properly aligned magnet will result in a reading of less than 128 over a full turn.
The MagINCn and MagDECn indicators will be = 1 when the alignment mode reading is < 128. At the same time, both hardware pins MagINCn
(#1) and MagDECn (#2) will be pulled to VSS. A properly aligned magnet will therefore produce a MagINCn = MagDECn = 1 signal throughout a
full 360o turn of the magnet.
Stronger magnets or short gaps between magnet and IC may show values larger than 128. These magnets are still properly aligned as long as
the difference between highest and lowest value over one full turn is at a minimum.
The Alignment mode can be reset to normal operation by a power-on-reset (disconnect / re-connect power supply) or by a falling edge on CSn
with PDIO = low.
Figure 13. Enabling the Alignment Mode
PDIO
CSn
Figure 14. Exiting Alignment Mode
PDIO
CSn
www.austriamicrosystems.com/AS5245
2μs
min.
2μs
min.
AlignMode enable
exit AlignMode
Revision 1.5
Read-out
via SSI
Read-out
via SSI
20 - 31
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