A4980LP View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
'A4980LP' PDF : 44 Pages View PDF
A4980
Automotive, Programmable Stepper Driver
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
CONFIG 0
0
0
SYR
MS1
MS0
MXI1
MXI0
PFD2 PFD1 PFD0
TBK1
TBK0
TOF2
FRQ2
TOF1
FRQ1
TOF0
FRQ0
PWM
1
0
0
1
1
1
0
0
0
1
1
1
0
0
Configuration Register 0
SYR Synchronous rectification
SYR Synchronous Rectification
0 Diode recirculation
1 Synchronous
Default
D
MS[1..0]
MXI1
0
0
1
1
Microstep mode for external STEP input control
MXI0 Microstep Mode
Default
0 Full Step
D
1 Half Step
0 Quarter Step
1 Sixteenth Step
MXI[1..0] Max phase current as a percentage of ISMAX
MXI1 MXI0 Maximum Current
Default
0
0
25%
0
1
50%
1
0
75%
1
1
100%
D
PFD[2..0] Fast decay time for mixed decay
Assumes 4-MHz clock
PFD2 PFD1 PFD0 Fast Decay Time
0
0
0
2 μs
0
0
1
3 μs
0
1
0
4 μs
0
1
1
6 μs
1
0
0
8 μs
1
0
1
10 μs
1
1
0
14 μs
1
1
1
20 μs
Default
D
TBK[1..0] Blank Time
Assumes 4-MHz clock
TBK1 TBK0 Blank Time
0
0
0
1
1
0
1
1
1 μs
1.5 μs
2.5 μs
3.5 μs
Default
D
TOF[2..0] Off time (only valid when PWM bit = 0)
Replaces FRQ bits
Assumes 4-MHz clock
TOF2 TOF1 TOF0 Off Time
Default
0
0
0
20 μs
0
0
1
24 μs
0
1
0
28 μs
0
1
1
32 μs
1
0
0
36 μs
1
0
1
40 μs
1
1
0
44 μs
D
1
1
1
48 μs
FRQ[2..0] Frequency (only valid when PWM bit = 1)
Replace TOF bits
Assumes 4-MHz clock
FRQ2 FRQ1 FRQ0 Period / Frequency
Default
0
0
0 24 μs / 41.7 kHz
0
0
1 32 μs / 31.3 kHz
0
1
0 40 μs / 25.0 kHz
0
1
1 46 μs / 21.7 kHz
1
0
0 52 μs / 19.2 kHz
1
0
1 56 μs / 17.9 kHz
1
1
0 60 μs / 16.7 kHz
D
1
1
1 64 μs / 15.6 kHz
PWM
PWM
0
1
PWM configuration
MODE
Fixed off-time
Fixed frequency
Default
D
Allegro MicroSystems, Inc.
19
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Share Link: 
