ADNS-2030 Avago Technologies US Inc., ADNS-2030 Datasheet - Page 23

• Manufacturer Part Number: ADNS-2030
• Description: Optical Mouse Sensor,DIP
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-2030

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

Motion
Access: Read
Data Type: Bit field
USAGE: Register 0x02 allows the user to determine if motion has occurred since the last time it was read. If so, then the user should read registers
Field Name
MOT
Reserved
FAULT
OVFY
OVFX
Reserved
Reserved
RES
Notes for Motion:
1. Reading this register freezes the Delta_X and Delta_Y register values. Read this register before reading the Delta_X and Delta_Y registers. If
2. Avago RECOMMENDS that registers 0x02, 0x03 and 0x04 be read sequentially.
3. Internal buffers can accumulate more than eight bits of motion for X or Y. If either one of the internal buffers overflows, then absolute path
4. The FAULT bit signifies that an LED fault has occurred since the last time the motion register was read. An LED fault occurs if RBIN has a low

Delta_X and Delta_Y are not read before the motion register is read a second time, the data in Delta_X and Delta_Y will be lost.
data is lost, and the OVFX or OVFY bit is set. To clear these bits (OVFX and OVFY), read the Motion, Delta_X and Delta_Y registers consecutive-
ly. Repeat until the motion bit (MOT) is cleared. Until MOT is cleared, the Delta_X or Delta_Y registers will read either positive or negative full
scale, except possibly the last read. If the motion register has not been read for long time, at 400 cpi it may take up to 16 read cycles to clear
the buffers, at 800 cpi, up to 32 cycles.
resistance connection to ground. When this is detected the LED is turned off. The FAULT bit is set after a fault occurs. The FAULT bit remains set
until the fault condition is cleared and the motion register is read. This bit is updated only when the motion register is read. Once an LED fault
has cleared, the hardware will drive the LED normally.
0x03 and 0x04 to get the accumulated motion. It also tells if the motion buffers have overflowed and whether or not an LED fault oc-
curred since the last reading. The current resolution is also shown.
Field
Bit
MOT
7
Reserved
6
Description
Motion since last report or PD
0 = No motion
1 = Motion occurred, data ready for reading in Delta_X and Delta_Y registers
Reserved for future
LED Fault detected – set when RBIN is too low or too high, shorts to V
0 = No fault
1 = Fault detected
Motion overflow Y, ∆Y buffer has overflowed since last report
0 = No overflow
1 = Overflow has occurred
Motion overflow X, ∆X buffer has overflowed since last report
0 = No overflow
1 = Overflow has occurred
Reserved for future
Resolution in counts per inch
0 = 400
1 = 800
Address: 0x02
Reset Value: 0x00
FAULT
5
OVFY
4
OVFX
3
Reserved
2
DD
Reserved
or Ground
1
RES
0