DRV8711_15 Datasheet, PDF (26/44 Pages) Texas Instruments – DRV8711 Stepper Motor Controller IC

DRV8711
SLVSC40E – JUNE 2013 – REVISED MARCH 2015
Register Maps (continued)
7.6.2 CTRL Register Address = 0x0h
BIT
NAME
SIZE R/W
0
ENBL
1
R/W
1
RDIR
1
R/W
2
RSTEP
1
W
6-3
MODE
4
R/W
7
EXSTALL
9-8
ISGAIN
1
R/W
2
R/W
11-10
DTIME
2
R/W
DEFAULT
0
0
0
0010
0
00
11
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DESCRIPTION
0: Disable motor
1: Enable motor
0: Direction set by DIR pin
1: Direction set by inverse of DIR pin
0: No action
1: Indexer will advance one step; automatically cleared after write
0000: Full-step, 71% current
0001: Half step
0010: 1/4 step
0011: 1/8 step
0100: 1/16 step
0101: 1/32 step
0110: 1/64 step
0111: 1/128 step
1000: 1/256 step
1001 – 1111: Reserved
0: Internal stall detect
1: External stall detect
ISENSE amplifier gain set
00: Gain of 5
01: Gain of 10
10: Gain of 20
11: Gain of 40
Dead time set
00: 400 ns dead time
01: 450 ns dead time
10: 650 ns dead time
11: 850 ns dead time
7.6.3 TORQUE Register Address = 0x1h
BIT
NAME
SIZE R/W
DEFAULT
7-0
TORQUE
8
R/W
0xFFh
10-8
SMPLTH
3
R/W
001
11
Reserved
1
-
-
DESCRIPTION
Sets full-scale output current for both H-bridges
Back EMF sample threshold
000: 50 µs
001: 100 µs
010: 200 µs
011: 300 µs
100: 400 µs
101: 600 µs
110: 800 µs
111: 1000 µs
Reserved
7.6.4 OFF Register Address = 0x2h
BIT
NAME
SIZE R/W
7-0
TOFF
8
R/W
8
11-9
PWMMODE
Reserved
1
R/W
3
-
DEFAULT
0x30h
0
-
DESCRIPTION
Sets fixed off time, in increments of 500 ns
0x00h: 500 ns
0xFFh: 128 µs
0: Use internal indexer
1: Bypass indexer, use xINx inputs to control outputs
Reserved
26
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