AMIS-30622 Datasheet, PDF (27/42 Pages) AMI SEMICONDUCTOR – I2C Microstepping Motordriver

AMIS-30622
Notes
(1) After Power on reset, the Shutdown state is entered. The Shutdown state can only be left after
GetFullStatus1 command (so that the Master could read the <VddReset> flag).
(2) A RunInit sequence runs with a separate set of RAM registers. The parameters that are not specified in a
RunInit command are loaded with the values stored in RAM at the moment the RunInit sequence starts.
AccShape is forced to ‘1’ during second motion even if a ResetToDefault command is issued during a
RunInit sequence, in which case AccShape at ‘0’ will be taken into account after the RunInit sequence. A
GetFullStatus1 command will return the default parameters for Vmax and Vmin stored in RAM.
(3) Shutdown state can be left only when <TSD> and <HS> flags are reset.
(4) Flags can be reset only after the master could read them via a GetFullStatus1 command, and provided the
physical conditions allow for it (normal temperature, correct battery voltage and no electrical or charge pump
defect).
(5) A SetMotorParam command sent while a motion is ongoing (state GotoPos) should not attempt to modify Acc
and Vmin values. This can be done during a RunInit sequence since this motion uses its own parameters, the
new parameters will be taken into account at the next SetPosition command.
(6) <SecEn> = ‘1’ when register SecPos is loaded with a value different from the most negative value (i.e. different
from 0x400 = “100 0000 0000”)
(7) <Stop> flag allows distinguishing whether state Stopped was entered after HardStop/SoftStop or not. <Stop>
is set to ‘1’ when leaving state HardStop or SoftStop and is reset during first clock edge occurring in state
Stopped.
(8) While in state Stopped, if ActPos ≠ TagPos there is a transition to state GotoPos. This transition has the lowest
priority, meaning that <Stop>, <TSD>, etc. are first evaluated for possible transitions.
(9) If <StepLoss> is active, then SetPosition and GotoSecurePosition commands are ignored (they will
not modify TagPos register whatever the state), and motion to secure position is forbidden. Other command
like RunInit or ResetPosition will be executed if allowed by current state. <StepLoss> can only be
cleared by a GetFullStatus1 command.
RunInit
SoftStop
ShutDown
HardStop
Stopped
G otoP os
Priorities
highest
lowest
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