AMIS-30623 Datasheet, PDF (20/65 Pages) AMI SEMICONDUCTOR – LIN Microstepping Motordriver

AMIS-30623
state and the new state will be High. (see Table 16). The next time S_BOT is closed the same conditions are observed. The previous state
was High, so based on Table 16 the new state remains unchanged. This high state will be interpreted as HW2 address = 1.
OPEN
In case the HW2 connection is lost (broken wire, bad contact in connector) the next time S_BOT is closed this will be sensed. There will be
no current, the output of the corresponding I Æ R converter is High and the HW2_Cmp will be low. The previous state was High. Based
in Table 16 one can see that the state changes to float. This will trigger a motion to secure position after a debounce time of 64 ms.
This prevents false triggering in case of false micro interruptions of the power supply. See also Electrical transient conduction along
supply lines.
R2GND
If a resistor is connected between HW2 and the GND, a current is sensed every 1024 μs whet S_TOP is closed. The output of the top I Æ
R converter is low and as a result the HW2_Cmp output switches to High. Again based on the stated diagram in Table 1 one can see
that the state will change to Low. This low state will be interpreted as HW2 address = 0.
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