PixArt Imaging Inc.
ADNS-7550 Integrated Molded Lead-Frame DIP Sensor
LSRPWR_CFG0
Address: 0x1c
Access: Read/Write
Reset Value: 0x00
Bit
7
6
5
4
3
2
1
0
Field
LP
LP
LP
LP
LP
LP
LP
LP
7
6
5
4
3
2
1
0
Data Type: 8 Bit unsigned
USAGE: This register is used to set the laser current. It is to be used together with register 0x1D, where register 0x1D
contains the complement of register 0x1C. If the registers do not contain complementary values, the laser is turned
off and the LP_VALID bit in the MOTION register is set to 0. The registers may be written in any order after the power
ON reset.
Field Name
Description
LP7 – LP0
Controls the 8-bit DAC for adjusting laser current.
One step is equivalent to (1/384)*100% = 0.26% drop of relative laser current.
Refer to the table below for examples of relative laser current settings.
LP7 - LP3
00000
00000
00000
: :
LP 2
0
LP 1
0
LP 0
0
Relative Laser Current
33.59%
0
0
1
33.85%
0
1
0
34.11%
:
:
:
: :
11111
11111
11111
1
0
1
99.48%
99.74%
100%
1
1
0
1
1
1
LSRPWR_CFG1
Address: 0x1d
Access: Read/Write
Reset Value: 0x00
5
Bit
7
6
4
3
2
1
0
Field
LPC
LPC
LPC
LPC
LPC
LPC
LPC
LPC
0
7
6
5
4
3
2
1
Data Type: 8 Bit unsigned
USAGE: The value in this register must be a complement of register 0x1C for laser current to be as programmed,
otherwise the laser is turned off and the LP_VALID bit in the MOTION register is set to 0. Registers 0x1C and 0x1D may
be written in any order after power ON reset.
Reserved
Address: 0x1e
All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission.
PixArt Imaging Inc.
E-mail: fae_service@pixart.com.tw
28
PIXART [ PIXART IMAGING INC. ]
