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AMIS-30624 I
2
C Microstepping Motordriver
Data Sheet
15.2.8. RAM Registers
Table 18: RAM Registers
Register
Mnemonic
Length
(Bit)
Related Commands
Comment
Reset State
Actual position
ActPos
16
GetFullStatus2
GotoSecurePos
ResetPosition
GetFullStatus2
GotoSecurePos
ResetPosition
SetPosition
GetFullStatus1
ResetToDefault
SetMotorParam
GetFullStatus1
ResetToDefault
SetMotorParam
GetFullStatus1
ResetToDefault
SetMotorParam
GetFullStatus1
ResetToDefault
SetMotorParam
GetFullStatus1
ResetToDefault
SetMotorParam
GetFullStatus1
ResetToDefault
SetMotorParam
GetFullStatus1
ResetToDefault
SetMotorParam
GetFullStatus2
ResetToDefault
SetMotorParam
GetFullStatus1
SetStallParam
GetFullStatus1
SetStallParam
GetFullStatus1
SetStallParam
GetFullStatus2
SetStallParam
GetFullStatus2
SetStallParam
GetFullStatus2
SetStallParam
GetFullStatus2
SetStallParam
SetMotorParam
16-bit signed
Last programmed
position
Pos/
TagPos
16
16-bit signed
(see
Positioning
)
Note 1
Acceleration shape
AccShape
1
1
‘0’
normal acceleration from Vmin to Vmax
‘1’
motion at Vmin without acceleration
‘0’
Coil peak current
Irun
4
1
Operating current
See look-up table
Irun
Coil hold current
Ihold
4
1
Standstill current
See look-up table
Ihold
Minimum velocity
Vmin
4
1
See Section
13.3 Minimum Velocity
See look-up table
Vmin
Maximum velocity
Vmax
4
1
See Section
13.2 Maximum Velocity
See look-up table
Vmax
Shaft
Shaft
1
1
Direction of movement
for positive velocity
Acceleration/
deceleration
Acc
4
1
See Section
13.4 Acceleration
See look-up table
Acc
Secure position
SecPos
11
1
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
See Section 15.4
Motion detection
DelThr
4
See Section 15.4
Motion detection
From OTP
memory
Stall detection delay
FS2StallEn
3
See Section 15.4
Motion detection
‘000’
Stall detection sampling
MinSamples
3
See Section 15.4
Motion detection
‘000’
PWM jitter
PWMJEn
1
‘1’ means jitter is added
‘0’
100% duty cycle stall
disable
PWM frequency
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.
DC100SDis
1
‘1’ means stall detection is disabled in case
PWM regulator runs at
δ
= 100%
‘1’ means 44 kHz is selected
‘0’
PWMFreq
1
‘0’
29
AMI Semiconductor
– Apr. 2007, Rev 3.1, M-20664-003
www.amis.com