AMIS-30622 Datasheet, PDF (13/42 Pages) AMI SEMICONDUCTOR – I2C Microstepping Motordriver

AMIS-30622
When using the command SetPosition, although coded on 16 bits, the position word will have to be shifted on
the left by a certain number of bits, according to the chosen stepping mode.
8.5.2. Secure position
A secure position can be programmed. It is coded on 11-bit, thus having a lower resolution than normal
positions, as shown in the table below. See command GotoSecurePosition.
Stepping mode
Half-stepping
1/4^th micro-stepping
1/8^th micro-stepping
1/16^th micro-stepping
Secure position resolution
4 half-steps
8 micro-steps (1/4^th)
16 micro-steps (1/8^th)
32 micro-steps (1/16^th)
Important note
The secure position is disabled in case the programmed value is the reserved code “10000000000”
(most negative position).
8.5.3. Shaft
A shaft bit can be programmed to define whether a positive motion is an outer or an inner motion:
• Shaft = 0 ⇒ MOTXP is used as positive pin of the X coil, while MOTXN is the negative one.
• Shaft = 1 ⇒ opposite situation
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