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TMC8462-BA 参数 Datasheet PDF下载

TMC8462-BA图片预览
型号: TMC8462-BA
PDF下载: 下载PDF文件 查看货源
内容描述: [Dual Integrated 100-Mbit Ethernet PHY]
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文件页数/大小: 204 页 / 12251 K
品牌: TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
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TMC8462 Datasheet Document Revision V1.4 2018-May -09  
158 / 204  
7.11 MFC IO Incremental Encoder Block  
This function block provides input pins for incremental encoder signals (two quadrature signals and one  
index signal) with dierential option. It has a large range of resolution settings, allowing the use of many  
dierent encoders without requiring extra calculations.  
Figure 34: MFC IO Incremental Encoder Unit  
Encoder Block Conguration Conguration of the Incremental Encoder Block is done via the ENC_MODE  
register. Polarities, index event handling, clear and latch options, and prescaler mode can be congured.  
N Event Flag The LSB in the ENC_STATUS register shows that an N event has occurred since the last read  
access to this register. The ag is cleared on a read access.  
Encoder Constant The encoder constant ENC_CONST is added to or subtracted from the encoder  
counter on each polarity change of the quadrature signals AB of the incremental encoder. The encoder  
constant ENC_CONST represents a signed xed point number (16.16) to facilitate the generic adaption  
between motors and encoders. In decimal mode, the lower 16 bits represent a number between 0 and  
9999. For stepper motors equipped with incremental encoders the xed number representation allows  
very comfortable parametrization. Additionally, mechanical gearing can easily be taken into account.  
Negating the sign of ENC_CONST allows inversion of the counting direction to match motor and encoder  
direction.  
The encoder constant can be congured in the ENC_CONST register.  
Examples:  
Encoder factor of 1.0:  
ENC_CONST = 0x0001.0x0000 = FACTOR.FRACTION  
Encoder factor of -1.0:  
ENC_CONST = 0xFFFF.0x0000  
This is the twos complement of 0x00010000. It equals (216-(FACTOR+1)).(216-FRACTION)  
Decimal mode encoder factor 25.6:  
ENC_CONST = 00025.6000 = 0x0019.0x1770 = FACTOR.DECIMALS  
Decimal mode encoder factor -25.6:  
ENC_CONST = 0xFFE6.4000 = 0xFFE6.0x0FAO.  
This equals (216-(FACTOR+1)).(10000-DECIMALS)  
©2018 TRINAMIC Motion Control GmbH & Co. KG, Hamburg, Germany  
Terms of delivery and rights to technical change reserved.  
Download newest version at www.trinamic.com  
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