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AMIS-30623 LIN Microstepping Motordriver
Data Sheet
15.2.9. RAM Registers
Table 19: RAM Registers
Register
Mnemonic
Length
(bit)
Related commands
Comment
Reset state
Actual position
ActPos
16
GetActualPos
GetFullStatus
GotoSecurePos
ResetPosition
GetFullStatus
GotoSecurePos
ResetPosition
SetPosition
SetPositionShort
GetFullStatus
ResetToDefault
2
SetMotorParam
GetFullStatus
ResetToDefault
2
SetMotorParam
GetFullStatus
ResetToDefault
2
SetMotorParam
GetFullStatus
ResetToDefault
2
SetMotorParam
GetFullStatus
ResetToDefault
2
SetMotorParam
GetFullStatus
ResetToDefault
2
SetMotorParam
GetFullStatus
ResetToDefault
2
SetMotorParam
GetFullStatus
ResetToDefault
2
SetMotorParam
GetFullStatus
SetStallParam
GetFullStatus
SetStallParam
GetFullStatus
SetStallParam
16-bit signed
Last programmed
position
Pos/
TagPos
16/11
16-bit signed or
11-bit signed for half stepping
(see
Positioning
)
Note 1
Acceleration shape
AccShape
1
‘0’
normal acceleration from Vmin to
Vmax
‘1’
motion at Vmin without acceleration
‘0’
Coil peak current
Irun
4
Operating current
See look-up table
Irun
Coil hold current
Ihold
4
Standstill current
See look-up table
Ihold
Minimum Velocity
Vmin
4
See Section
13.3 Minimum Velocity
See look-up table
Vmin
Maximum Velocity
Vmax
4
See Section
13.2 Maximum Velocity
See look-up table
Vmax
Shaft
Shaft
1
Direction of movement
for positive velocity
Acceleration/
deceleration
Acc
4
See Section
13.4 Acceleration
See look-up table
Acc
Secure Position
SecPos
11
Target position when LIN connection fails;
11 MSBs of 16-bit position (LSBs fixed to
‘0’)
See Section
13.1 Stepping Modes
See look-up table
StepMode
Stepping mode
StepMode
2
Stall detection absolute
threshold
Stall detection delta
threshold
AbsThr
4
DelThr
4
Sleep Enable
SleepEn
SetOTPParam
Enables entering sleep mode after LIN lost
See also
16.8 LIN lost behavior
Triggers autonomous motion after LIN lost
at POR See also
16.8 LIN lost behavior
Fail Safe
FailSafe
SetOTPParam
From OTP
memory
Stall detection delay
FS2StallEn
3
GetFullStatus
SetStallParam
GetFullStatus
SetStallParam
GetFullStatus
SetStallParam
GetFullStatus
SetStallParam
GetFullStatus
SetMotorParam
Delays the stall detection after acceleration
‘000’
Stall detection
sampling
MinSamples
3
‘000’
PWM Jitter
PWMJEn
1
‘1’ means jitter is added
‘0’
100% duty cycle Stall
Disable
DC100SDis
1
‘1’ means stall detection is disabled in
case PWM regulator runs at
δ
= 100%
‘0’
PWM frequency
PWMFreq
1
‘0’
Note 1
: A
ResetToDefault
command will act as a reset of the RAM content, except for
ActPos
and
TagPos
registers that are not modified.
Therefore, the application should not send a
ResetToDefault
during a motion, to avoid any unwanted change of parameter.
31
AMI Semiconductor
– June 2006, Rev 3.0
www.amis.com