ADNS-4000 Avago Technologies US Inc., ADNS-4000 Datasheet - Page 29

• Manufacturer Part Number: ADNS-4000
• Description: SENSOR OPTICAL MOUSE LP 8DIP
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-4000

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

BURST_READ_FIRST
Burst Read Starting Address Register
Access: Read/Write
Data Type:
USAGE:
AUTO_LED_CTRL
AUTO LED Control
Access: Read/Write
Data Type:
USAGE:
29
Bit
7:4
3:2
1
0
Field RSVD
Field BM7
Bit 7
Bit 7
Field Name
RSVD
LED_HI [1:0]
LED_LO
A_LED_DIS
Address: 0x42
Reset Value: 0x03
Eight bit unsigned integer
This register provides the starting register address the sensor will read during Burst Mode. For
more information, refer to Burst Mode Operation.
Note: To change the burst mode starting address from default (DELTA_X or 0x03) pull the NCS
low, set the BURST_READ_FIRST register with the burst mode starting address, read register
0x63 for burst reads, and terminate the burst reads by pulling NCS high. This must be repeated
each time when performing burst reads with address other than default.
Address: 0x43
Reset Value: 0x08
Eight bit unsigned integer
This register enables AUTO LED current switching. This is a ‘smart’ LED feature whereby the
LED current is self adjusting between the low and high current settings (bit 3:1) according to
the brightness of the tracking surface if this feature is enabled (via clearing bit 0). The brighter
the surface, the lower the LED current will be. If A_LED_DIS (bit 0) is set, this means AUTO
LED mode is disabled, then the LED current is determined by LSEL[1:0] setting in LED_CTRL
register (0x40).
Note: When AUTO LED is enabled, the AUTO LED current will be switched between low and
high current setting determined by LED_LO and LED_HI [1:0]. If LED_LO current setting is
higher than the LED_HI, the current will be based on the higher setting. For example if LED_
LO is 20mA and LED_HI is 15mA, the AUTO LED current will be fi xed at 20mA.
6
RSVD
6
BM6
Description
Reserved
AUTO LED High Current
0x0: Auto LED high current is 15mA
0x1: Auto LED high current is 20mA
0x2: Auto LED high current is 30mA (default)
0x3: Auto LED high current is 36mA
AUTO LED Low Current
0: Auto LED low current is 15mA (default)
1: Auto LED low current is 20mA
AUTO LED Disable
0: AUTO LED enabled (default)
1: AUTO LED disabled
5
RSVD
5
BM5
4
RSVD
4
BM4
3
LED_HI [1]
3
BM3
2
LED_HI [0]
2
BM2
1
LED_LO
1
BM1
0
A_LED_DIS
0
BM0