DRV8711 Datasheet, PDF (27/34 Pages) Texas Instruments – STEPPER MOTOR CONTROLLER IC

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BLANK Register
Address = 0x03h
BIT
NAME
7-0
TBLANK
8
11-9
ABT
Reserved
DECAY Register
Address = 0x04h
BIT
NAME
7-0
TDECAY
10-8
DECMOD
11
Reserved
STALL Register
Address = 0x05h
BIT
NAME
7-0
SDTHR
10-8
SDCNT
11
VDIV
DRV8711
SLVSC40 – JUNE 2013
SIZE R/W
8
R/W
1
R/W
3
-
DEFAULT
0x80h
0
-
DESCRIPTION
Sets current trip blanking time, in increments of 20 ns
0x00h: 1.00 µs
…
0x32h: 1.00 µs
0x33h: 1.02 µs
…
0xFEh: 5.10 µs
0xFFh: 5.12 µs
Also sets minimum on-time of PWM
0: Disable adaptive blanking time
1: Enable adaptive blanking time
Reserved
SIZE R/W
8
R/W
3
R/W
1
-
DEFAULT
0x10h
1
-
DESCRIPTION
Sets mixed decay transition time, in increments of 500 ns
000: Force slow decay at all times
001: Slow decay for increasing current, mixed decay for
decreasing current (indexer mode only)
010: Force fast decay at all times
011: Use mixed decay at all times
100: Slow decay for increasing current, auto mixed decay for
decreasing current (indexer mode only)
101: Use auto mixed decay at all times 110 – 111: Reserved
Reserved
SIZE R/W
8
R/W
2
R/W
2
R/W
DEFAULT
0x40h
0
0
DESCRIPTION
Sets stall detect threshold
The correct setting needs to be determined experimentally
00: STALLn asserted on first step with back EMF below SDTHR
01: STALLn asserted after 2 steps
10: STALLn asserted after 4 steps
11: STALLn asserted after 8 steps
00: Back EMF is divided by 32
01: Back EMF is divided by 16
10: Back EMF is divided by 8
11: Back EMF is divided by 4
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