參數(shù)資料
型號： AMIS-30621-AGA
元件分類： 運動控制電子
英文描述： STEPPER MOTOR CONTROLLER, 0.8 A, PDSO20
封裝： 300 INCH, PLASTIC, SOIC-20
文件頁數(shù)： 5/57頁
文件大?。?/td> 1017K
代理商： AMIS-30621-AGA
AMIS-30621 LIN Micro-stepping Motor Driver
Data Sheet
13
AMI Semiconductor
– Sept. 2007, Rev 1.5
www.amis.com
12.5.1. Position Ranges
A position is coded by using the binary two’s complement format. According to the positioning commands used and to the chosen
stepping mode, the position range will be as shown in Table 11.
Table 11: Position Range
Command
Stepping Mode
Position Range
Full Range Excursion
Number of Bits
Half-stepping
-4096 to +4095
8192 half-steps
13
1/4
th micro-stepping
-8192 to +8191
16384 micro-steps
14
1/8
th micro-stepping
-16384 to +16383
32768 micro-steps
15
SetPosition
1/16
th micro-stepping
-32768 to +32767
65536 micro-steps
16
SetPositionShort
Half-stepping
-1024 to +1023
2048 half-steps
11
When using the command SetPosition, although coded on 16 bits, the position word will have to be shifted to the left by a certain
number of bits, according to the stepping mode.
12.5.2. Secure Position
A secure position can be programmed. It is coded in 11-bits, thus having a lower resolution than normal positions, as shown in
Table 12: Secure Position
Stepping Mode
Secure Position Resolution
Half-stepping
4 half-steps
1/4
th micro-stepping
8 micro-steps (1/4
th)
1/8
th micro-stepping
16 micro-steps (1/8
th)
1/16
th micro-stepping
32 micro-steps (1/16
th)
Important Notes:
(1)
The secure position is disabled in case the programmed value is the reserved code “10000000000” (0x400 or most negative position).
(2) After start-up the OTP register is copied in RAM as illustrated below.
12.5.3. Shaft
A shaft bit which can be programmed in OTP or with command SetMotorParam, defines whether a positive motion is a clockwise or
counter-clockwise rotation (an outer or an inner motion for linear actuators):
Shaft = 0 MOTXP is used as positive pin of the X coil, while MOTXN is the negative one.
Shaft = 1 opposite situation.
SecPos10
SecPos9
SecPos8
SecPos2
SecPos1
SecPos0
SecPos10
SecPos9
SecPos8
SecPos2
SecPos1
SecPos0
RAM
OTP
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