DRV8808 Datasheet, PDF (16/38 Pages) Texas Instruments – COMBINATION MOTOR DRIVER WITH DC-DC CONVERTER

DRV8808
SLVS857A – DECEMBER 2009 – REVISED AUGUST 2011
www.ti.com
Operation Extended Setup Register Bit Assignment
Table 3. Extended Setup Register ^{(1) (2)}
BANK
BIT
NA
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
FUNCTION
Signal Select 0
Signal Select 1
Signal Select 2
Signal Select 3
DCDC/LDO ISD Mask
DCDC/LDO VSD Mask
Motor ISD Mask
TSD Mask
Reset Mask C
Reset Mask B
Reset Mask A
Reset Mask SR
Pre TSD
TSD Cont0
TSD Cont1
MISD Cont
DEFAULT
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
COMMENT
See Logic_Out Table
0: Disable, 1: Enable
0: Disable, 1: Enable
0: Disable, 1: Enable
0: Disable, 1: Enable
0: Disable, 1: Enable
0: Disable, 1: Enable
0: Disable, 1: Enable
0: Disable, 1: Enable
0: TSD-20C, 1: Analog output
See TSD Control Table
See MISD Control Table
(1) All bits go to default for V_M < Vth_VM–, nReset = L.
(2) Bits [11:8] are selective shutdown bits. Setting to a 1 makes faults on the associated regulator only shutdown that regulator and allows
restart on an nSLEEP L > H transition. Setting to 0 shuts everything down and restarts only for V_M < Vth_VM– or nReset = L.
TSD Cont1
0
0
1
1
TSD Cont0
0
1
0
1
Table 4. TSD Control – Operation After Detected TSD
DC-DC
OFF
ON
ON
OFF
MOTORS
OFF
OFF
OFF
OFF
nORT
LOW
HIGH
PULSE
LOW
LDO
OFF
ON
ON
OFF
RELEASED BY
V_M < Vth_VM– or nReset = L
V_M < Vth_VM– or nReset = L or nSLEEP L > H transition
V_M < Vth_VM– or nReset = L or nSLEEP L > H transition
V_M < Vth_VM– or nReset = L
Table 5. MISD Control – Operation After Detected Motor OCP
MISD Cont
0
1
DC-DC
ON
OFF
MOTORS
OFF
OFF
nORT
PULSE ⁽¹⁾
LOW
LDO
ON
OFF
RELEASED BY
V_M < Vth_VM– or nReset = L or nSLEEP L > H transition
V_M < Vth_VM– or nReset = L
(1) PULSE in Control Tables is 40-ms duration.
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