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AMIS-30623-AGA 参数 Datasheet PDF下载

AMIS-30623-AGA图片预览
型号: AMIS-30623-AGA
PDF下载: 下载PDF文件 查看货源
内容描述: [Micro Peripheral IC,]
分类和应用:
文件页数/大小: 67 页 / 3352 K
品牌: AMI [ AMI SEMICONDUCTOR ]
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AMIS-30623 LIN Microstepping Motordriver  
Data Sheet  
16.6 LIN Frames  
The LIN frames can be divided in writing and reading frames. A frame is composed of an 8-bit Identifier followed by 2, 4 or 8 data-bytes.  
Writing frames will be used to:  
Program the OTP Memory;  
Configure the component with the stepper-motor parameters (current, speed, stepping-mode, etc.);  
Provide set-point position for the stepper-motor.  
Whereas reading frames will be used to:  
Get the actual position of the stepper-motor;  
Get status information such as error flags;  
Verify the right programming and configuration of the component.  
16.6.1. Writing Frames  
A writing frame is sent by the LIN master to send commands and/or information to the slave nodes. According to the LIN specification,  
identifiers are to be used to determine a specific action. If a physical addressing is needed, then some bits of the data field can be  
dedicated to this, as illustrated in the example below.  
Identifier byte  
ID0 ID1 ID2 ID3 ID4 ID5 ID6 ID7  
Data byte 1  
phys. address  
Data byte 2  
command parameters (e.g. position)  
Another possibility is to determine the specific action within the data field in order to use less identifiers. One can for example use the  
reserved identifier 0x3C and take advantage of the 8 byte data field to provide a physical address, a command and the needed  
parameters for the action, as illustrated in the example below.  
ID  
Data1  
Data2  
Data3  
Data4  
Data5  
Data6  
Data7  
Data8  
0x3C 00  
1
physical  
address  
AppCmd  
command  
parameters  
Note:  
Bit 7 of byte Data1 must be at ‘1’ since the LIN specification requires that contents from 0x00 to 0x7F must be reserved for broadcast messages (0x00 being for the “Sleep”  
message). See also LIN command Sleep  
The writing frames used with the AMIS-30623 are the following:  
Type #1: General purpose 2 or 4 data bytes writing frame with a dynamically assigned identifier. This type is dedicated to  
short writing actions when the bus load can be an issue. They are used to provide direct command to one (Broad =  
‘1’) or all the slave nodes (Broad = ‘0’). If Broad = ‘1’, the physical address of the slave node is provided by the 7  
remaining bits of DATA2. DATA1 will contain the command code (see Dynamic assignment of Identifiers), while, if  
present, DATA3 to DATA4 will contain the command parameters, as shown below.  
ID  
Data1  
command  
Data2  
Physical address  
Data3…  
parameters…  
ID0 ID1 ID2 ID3 ID4 ID5 ID6 ID7  
Broad  
Type #2: 2, 4 or 8 data bytes writing frame with an identifier dynamically assigned to an application command, regardless of  
the physical address of the circuit.  
Type #3: 2 data bytes writing frame with an identifier dynamically assigned to a particular slave node together with an  
application command. This type of frame requires that there are as many dynamically assigned identifiers as there  
are AMIS-30623 circuits using this command connected to the LIN bus.  
Type #4: 8 data bytes writing frame with 0x3C identifier.  
AMI Semiconductor – June 2006, Rev 3.0  
44  
www.amis.com