DRV8809 Datasheet, PDF (15/44 Pages) Texas Instruments – COMBINATION MOTOR DRIVERS WITH DC-DC CONVERTERS

DRV8809
DRV8810
www.ti.com ............................................................................................................................................................... SLVS854A – JULY 2008 – REVISED JULY 2008
Setup Register Bit Assignment
Setup register bits are assigned for motor configuration, blanking time, gain, and DC-DC switches. This register
can be accessed only in Setup mode (nSLEEP = L and bit 16 data = L) .
BIT NO.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
NAME
Motor select 0
Motor select 1
Motor select 2
TBLNK AB0
TBLNK AB1
TBLNK CD0
TBLNK CD1
DC/DC_A SW
DC/DC_B SW
DC/DC_C SW
Motor_AB gain
Motor_CD gain
OSCD frequency 0
OSCD frequency 1
OSCM frequency 0
OSCM frequency 1
Table 2. Setup Register
DEFAULT
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
DESCRIPTION
Motor configuration, < 2,1,0 > (0,0,0): Stepper × 2 (default)
(0,0,1): Stepper + LDC, (0,1,0): Stepper + 2 × sDCs
(0,1,1): DCL + 2 × sDC, (1,0,0): DCL × 2 (1,0,1): 4 × sDC
(1,1,0): Large stepper (1,1,1): Ultra-large DC
Tblank for DC motor driving, Tblank is inserted at any phase change
and beginning of each chopping cycle.
AB1 AB0: Blanking time for A/B side drivers,
CD1 CD0: Blanking time for C/D side drivers,
00: (1 ÷ f_CHOP) ÷ 8 × 5 (= 6.25 µs) (default)
01: (1 ÷ f_CHOP) ÷ 8 × 6 (= 7.50 µs)
10: (1 ÷ f_CHOP) ÷ 8 × 3 (= 3.75 µs)
11: (1 ÷ f_CHOP) ÷ 8 × 4 (= 5.00 µs)
For stepper motor driving, only the fixed blanking time is applied.
DC-DC ODA control, 0: ON (default), 1: OFF
DC-DC ODB control, 0: ON (default), 1: OFF
DC-DC ODC control, 0: ON (default), 1: OFF
This bit is ignored when DCDC_MODE = H or open
0: 1/10 (default), 1: 0
0: 1/10 (default), 1: 0
<1,0> = (0,0) 100 kHz (default)
(0,1) 50 kHz
(1,0) 200 kHz
(1,1) 132.5 kHz
These setup bits can be changed when the DC-DC regulators are in
operation.
<1,0> = (0,0) 800 kHz (default)
(0,1) 400 kHz
(1,0) 1.06 MHz
(1,1) 1.6 MHz
The device can be configured to one out of eight different motor control combination modes. When the device is
powered on or is recovering from reset, the mode can be selected by writing to the setup register through the
serial interface AB, during Setup mode (nSLEEP = L).
Table 3. DC and Stepper Motor Configuration
SETUP REGISTER
BIT 2
BIT 1
BIT 0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Default setting is (M0, M1, M2) = (0, 0,
0)
H-BRIDGE AND MOTOR CONFIGURATION
OUTA+, OUTA–
OUTB+, OUTB–
OUTC+, OUTC–
OUTD+, OUTD–
Stepper motor drive
Stepper motor drive
Stepper motor drive
Large DC motor drive
Stepper motor drive
DC motor drive
DC motor drive
Large DC motor drive
DC motor drive
DC motor drive
Large DC motor drive
Large DC motor drive
DC motor drive
DC motor drive
DC motor drive
DC motor drive
Large stepper motor drive: A + B for first winding, C + D for second winding
Ultra-large DC motor drive
Copyright © 2008, Texas Instruments Incorporated
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