AMIS30421C4211G ONSEMI [ON Semiconductor], AMIS30421C4211G Datasheet - Page 31

• Manufacturer Part Number: AMIS30421C4211G
• Description: Micro-Stepping Stepper Motor Bridge Controller
• Manufacturer: ONSEMI [ON Semiconductor]

Control Register 0 (CR0)
to set the “coil current zero crossing” duration.
Control Register 1 (CR1)
WDb−, ERRb− and DO−pin and to enable PWM jitter. It can also be used to set an additional delay between switching off and
on MOSFET’s of one half H−bridge (to prevent a short circuit).
Table 11. CONTROL REGISTER 0
Table 12. CONTROL REGISTER 0 PARAMETERS
Table 13. CONTROL REGISTER 1
MIN_SLA_TIME[1:0]
Control Register 0 is located at address 0x01 and is used to set the maximum coil current and stepping mode. It’s also used
Control Register 1 is located at address 0x02 and can used to set the direction, NXT−pin polarity, output configuration of
Address
0x02
Parameter
Address
CUR[2:0]
SM[2:0]
0x01
Access
Reset
Data
Value
000
001
010
100
101
000
001
010
100
101
011
110
111
011
110
111
Access
00
01
10
11
Reset
Data
DIRCTRL
Bit 7
R/W
0
Half step uncompensated
Half step compensated
Bit 7
R/W
Full Step
100 mV
135 mV
200 mV
270 mV
335 mV
400 mV
500 mV
600 mV
0
120 ms
200 ms
360 ms
Value
40 ms
NXTP
32
64
16
Bit 6
R/W
8
4
th
th
0
nd
th
th
Control Register 0 (CR0)
Control Register 1 (CR1)
SM[2:0]
http://onsemi.com
Bit 6
R/W
0
Bit 5
R/W
0
−
Defines the 8 stepping modes for the PWM regulator.
Defines the minimum “coil current zero crossing” duration.
Remark: when NXT frequency gets above PWM frequency
(f
Defines the maximum voltage over the coil current sense
resistor which defines the maximum coil current.
The maximum coil current is calculated as next:
I
31
coil
PWM
= CUR[2:0] / R
Bit 5
R/W
), MIN_SLA_TIME could be 40us longer.
0
IO_OT
Bit 4
R/W
1
MIN_SLA_TIME[1:0]
Bit 4
R/W
sense
0
Bit 3
R/W
0
−
Description
Bit 3
R/W
0
PWMJ
Bit 2
R/W
0
Bit 2
R/W
0
Bit 1
R/W
NO_CROSS[1:0]
0
CUR[2:0]
Bit 1
R/W
0
Bit 0
R/W
p20
Bit 0
1
R/W
Info
p19
p20
0