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DRV8809 Datasheet, PDF (18/44 Pages) Texas Instruments – COMBINATION MOTOR DRIVERS WITH DC-DC CONVERTERS
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DRV8809
DRV8810
SLVS854A – JULY 2008 – REVISED JULY 2008 ............................................................................................................................................................... www.ti.com
BIT NO.
4
5
6
7
8
9
10
11
12
13
14
15
Table 7. Register Settings for Stepper Motor Driving Parameter (continued)
NAME
Current B(D)0
Current B(D)1
Current B(D)2
Current B(D)3
Phase B(D)
Decay A(C)0
Decay A(C)1
Current A(C)0
Current A(C)1
Current A(C)2
Current A(C)3
Phase A(C)
DEFAULT VALUE
0
0
0
0
0
0
0
0
0
0
0
0
DESCRIPTION
Phase B(D) current level setting(1)
Control direction of current flow through winding B(D). A logic 1 allows
conventional current flow from OUTB(D)+ to OUTB(D)–.
Decay mode control(1)
A(C)1, A(C)0: 00 equates to 12.5 % (do not use)
01 equates to 37.5 % (do not use)
10 equates to 75%
11 equates to fast decay
Phase A current level setting(1)
Control direction of current flow through winding A(C). A logic 1 allows
conventional current flow from OUTA(C)+ to OUTA(C)–.
BIT VALUE
Torque 0, 1 = 0, 0
Torque 0, 1 = 0, 1
Torque 0, 1 = 1, 0
Torque 0, 1 = 1, 1
Table 8. Torque Control Bit
VREF INPUT CONTROL MOTOR TORQUE
ROUGH OUTPUT CURRENT SETTING
50% high power consumption, I(max) = VREF * gain/RSense
70% power
85% power
100% power
BIT VALUE
Decay x0, x1 = 0, 0
Decay x0, x1 = 0, 1
Decay x0, x1 = 1, 0
Decay x0, x1 = 1, 1
Table 9. Decay Mode Control Bit
DECAY MODE SETTING
12.5% decay mode (do not use)
37.5% decay mode (do not use)
75% decay mode
100% fast decay mode
BIT VALUE
Phase X = 0
Phase X = 1
Table 10. Current Flow Direction Bit
CURRENT DIRECTION
OUTx+ = L, OUTx– = H
OUTx+ = H, OUTx– = L
Table 11. Revision Code/Vendor Code ROM Readout at LOGIC OUT
NO.
EX-setup REGISTER
(BITS 3–0)
SIGNAL SELECTION MONITORED ON LOGIC OUT
8
1000
Revision <0> = 1: For this device * <2,1,0> = (1,0,1) = 5
9
1001
Revision <1> = 0: For this device
10
1010
Revision <2> = 1: For this device
11
1011
Vendor <0> = 0: For TI <1,0> = TI (0,0), NG(1,0)
12
1100
Vendor <1> = 0: For TI <1,0> = Reserve (0,1), (1,1)
18
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