DRV201A Datasheet, PDF (17/25 Pages) Texas Instruments – VOICE COIL MOTOR DRIVER FOR CAMERA AUTO FOCUS

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REGISTER ADDRESS MAP
REGISTER
ADDRESS (HEX)
1
01
2
02
3
03
4
04
5
05
6
06
7
07
NAME
not used
CONTROL
VCM_CURRENT_MSB
VCM_CURRENT_LSB
STATUS
MODE
VCM_FREQ
DRV201A
SLVSBN6 – JUNE 2013
DEFAULT
VALUE
0000 0010
0000 0000
0000 0000
0000 0000
0000 0000
1000 0011
DESCRIPTION
Control register
Voice coil motor MSB current control
Voice coil motor LSB current control
Status register
Mode register
VCM resonance frequency
CONTROL REGISTER (CONTROL)
Address – 0x02h
DATA BIT
D7
D6
FIELD NAME
not used not used
READ/WRITE
R
R
RESET VALUE
0
0
D5
not used
R
0
D4
not used
R
0
D3
not used
R
0
D2
not used
R
0
D1
EN_RING
R/W
1
D0
RESET
R/W
0
FIELD NAME
RESET
EN_RING
BIT DEFINITION
Forced software reset (reset all registers to default values) and device goes into STANDBY. RESET
bit is automatically cleared when written high.
0 – inactive
1 – device goes to STANDBY
Enables ringing compensation.
0 – disabled
1 – enabled
VCM MSB CURRENT CONTROL REGISTER (VCM_CURRENT_MSB)
Address – 0x03h
DATA BIT
D7
D6
D5
D4
D3
FIELD NAME
not used not used not used not used not used
READ/WRITE
R
R
R
R
R
RESET VALUE
0
0
0
0
0
D2
not used
R
0
D1
D0
VCM_CURRENT[9:8]
R/W
0
0
FIELD NAME
VCM_CURRENT[9:8]
VCM current control
00 0000 0000b – 0 mA
00 0000 0001b – 0.1 mA
00 0000 0010b – 0.2 mA
…
11 1111 1110b – 102.2 mA
11 1111 1111b – 102.3 mA
BIT DEFINITION
NOTE
When setting the current in DRV201A both
VCM_CURRENT_MSB and VCM_CURRENT_LSB
registers have to be updated. DRV201A starts updates the
current after LSB register write is completed.
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Product Folder Links: DRV201A
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