ADNS-7550 Avago Technologies US Inc., ADNS-7550 Datasheet - Page 28

• Manufacturer Part Number: ADNS-7550
• Description: Optical Mouse Sensor,DIP
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-7550

• Mounting Style: Through Hole
• Termination Style: Solder Pin
• Supply Voltage: 5 V
• Operating Temperature Range: 0 C to + 40 C
• Product: Optical
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 516-2180; ADNS-7550

Reserved
LSRPWR_CFG0
Access: Read/Write
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
LP7 – LP0
LP7 - LP3
00000
00000
00000
: :
11111
11111
11111
LSRPWR_CFG1
Access: Read/Write
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.
28
Field
Field
Bit
Bit
LPC
LP 2
0
0
0
:
1
1
1
LP
Description
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.
7
7
7
7
LP 1
0
0
1
:
0
1
1
LPC
LP
6
6
6
6
Address: 0x1e
Address: 0x1c
Reset Value: 0x00
Address: 0x1d
Reset Value: 0x00
LP 0
0
1
0
:
1
0
1
LPC
LP
5
5
5
5
Relative Laser Current
33.59%
33.85%
34.11%
: :
99.48%
99.74%
100%
LPC
LP
4
4
4
4
LPC
LP
3
3
3
3
LPC
LP
2
2
2
2
LPC
LP
1
1
1
1
LPC
LP
0
0
0
0