AMIS-30624 Datasheet, PDF (27/56 Pages) AMI SEMICONDUCTOR – I2C Microstepping Motordriver

AMIS-30624
14.2.8. RAM Registers
Table 18: RAM Registers
Register
Mnemonic
Length
(Bit)
Related Commands
Comment
Actual position
ActPos
16
GetFullStatus2
GotoSecurePos
16-bit signed
ResetPosition
Last programmed
position
Pos/
TagPos
16
GetFullStatus2
GotoSecurePos
ResetPosition
SetPosition
16-bit signed
(see Positioning)
Acceleration shape
AccShape
1
GetFullStatus1
ResetToDefault¹
SetMotorParam
‘0’ ⇒ normal acceleration from Vmin to Vmax
‘1’ ⇒ motion at Vmin without acceleration
Coil peak current
GetFullStatus1
Irun
4
ResetToDefault¹
SetMotorParam
Operating current
See look-up table Irun
Coil hold current
Ihold
4
GetFullStatus1
ResetToDefault¹
SetMotorParam
Standstill current
See look-up table Ihold
Minimum velocity
GetFullStatus1
Vmin
4
ResetToDefault¹
SetMotorParam
See Section 13.3 Minimum Velocity
See look-up table Vmin
Maximum velocity
GetFullStatus1
Vmax
4
ResetToDefault¹
SetMotorParam
See Section 13.2 Maximum Velocity
See look-up table Vmax
Shaft
Shaft
1
GetFullStatus1
ResetToDefault¹
SetMotorParam
Direction of movement
for positive velocity
Acceleration/
deceleration
GetFullStatus1
Acc
4
ResetToDefault¹
SetMotorParam
See Section 13.4 Acceleration
See look-up table Acc
Secure position
SecPos
11
GetFullStatus2
ResetToDefault¹
SetMotorParam
Target position when LIN connection fails; 11
MSBs of 16-bit position (LSBs fixed to ‘0’)
Stepping mode
StepMode
2
GetFullStatus1
SetStallParam
See Section 13.1 Stepping Modes
See look-up table StepMode
Stall detection absolute
threshold
AbsThr
4
GetFullStatus1
SetStallParam
See Section 15.4 Motion detection
Stall detection delta
threshold
DelThr
4
GetFullStatus1
SetStallParam
See Section 15.4 Motion detection
Stall detection delay
FS2StallEn
3
GetFullStatus2
SetStallParam
See Section 15.4 Motion detection
Stall detection sampling MinSamples
3
GetFullStatus2
SetStallParam
See Section 15.4 Motion detection
PWM jitter
PWMJEn
1
GetFullStatus2
SetStallParam
‘1’ means jitter is added
100% duty cycle stall
disable
DC100SDis
1
GetFullStatus2
SetStallParam
‘1’ means stall detection is disabled in case
PWM regulator runs at δ = 100%
PWM frequency
PWMFreq
1
SetMotorParam
‘1’ means 44 kHz is selected
Note:
A ResetToDefault command will act as a reset of the RAM content, except for ActPos and TagPos, which are registers that are not modified.
Therefore, the application should not send a ResetToDefault during a motion, to avoid any unwanted change of parameter.
Reset State
Note 1
‘0’
From OTP
memory
‘000’
‘000’
‘0’
‘0’
‘0’
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