AMIS-30624_13 Datasheet, PDF (21/52 Pages) ON Semiconductor – I2C Micro-stepping Motor Driver

AMIS−30624, NCV70624
S_{PASS_T}
I/R
1
2
3
1 = R2GND
2 = R2VBAT
3 = OPEN
S_TOP
1k
SWI
S_BOT
DriveHS
DriveLS
LOGIC
State
Closed
Open
‘‘R”−Comp
I/R
S_{PASS_B COMP}
32 ms Debouncer
SWI_Cmp
R_th
Figure 12. Simplified Schematic Diagram of the SWI Comparator
As illustrated in the drawing above, a change in state is
always synchronized with DriveHS or DriveLS. The same
synchronization is valid for updating the internal position
register. This means that after every current pulse (or closing
of S_TOP or S_BOT) the state of the position switch together
with the corresponding position is memorized.
The FullStatus1 command reads back the
<ActPos> register and the status of ESW. In this way the
master node may get synchronous information about the
state of the switch together with the position of the motor.
See Table 16 below.
Table 16. GetFullStatus1 I²C COMMAND
GetFullStatus1 Response Frame
Structure
Byte
Content
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
0
Address
1
1
OTP3
OTP2
OTP1
1
Address
1
1
1
OTP3
OTP2
2
Data 1
Irun[3:0]
3
Data 2
Vmax[3:0]
4
Data 3
AccShape
StepMode[1:0]
Shaft
5
Data 4
VddReset StepLoss
ElDef
UV2
TSD
6
Data 5
Motion[2:0]
ESW
OVC1
7
Data 6
1
1
1
1
1
8
Data 7
AbsThr[3:0]
Bit 2
Bit 1
Bit 0
OTP0
HW
1
OTP1
OTP0
HW
Ihold[3:0]
Vmin[3:0]
Acc[3:0]
TW
Tinfo[1:0]
OVC2
Stall
CPFail
1
1
1
DelThr[3:0]
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