PixArt Imaging Inc.
ADNS-7530 Integrated Molded Lead-Frame DIP Sensor
Motion
Address: 0x02
Access: Read/Write
Reset Value: 0x00
Bit
7
6
5
4
3
2
1
0
Field
MOT
PIXRDY
PIXFIRST
OVF
LP_VALID
FAULT
Reserved
Reserved
Data Type: Bit field.
USAGE: Register 0x02 allows the user to determine if motion has occurred since the last time it was read. If the MOT
bit is set, then the user should read registers 0x03 and 0x04 to get the accumulated motion. Read this register before
reading the Delta_X_L, Delta_Y_L and Delta_XY_H registers.
Writing anything to this register clears the MOT and OVF bits, Delta_X_L, Delta_Y_L and Delta_XY_H registers. The
written data byte is not saved.
If one of the 12 bits motion registers overflows, then absolute path data is lost and the OVF bit is set. Once OVF bit set,
Sensor will stop accumulating motion data. Motion registers and OVF bit will be clear after data been read out.
The PIXRDY bit will be set whenever a valid pixel data byte is available in the Pixel_Grab register. Check that this bit is
set before reading from Pixel_Grab. To ensure that the Pixel_Grab pointer has been reset to pixel 0,0 on the initial write
to Pixel_Grab, check to see if PIXFIRST is set to high.
Field Name
Description
MOT
Motion since last report
0 = No motion
1 = Motion occurred, data ready for reading in Delta_X_L, Delta_Y_L and
Delta_XY_H registers
PIXRDY
Pixel_Grab data byte is available in Pixel_Grab register
0 = data not available
1 = data available
PIXFIRST
This bit is set when the Pixel_Grab register is written to or when a complete
pixel array has been read, initiating an increment to pixel 0,0.
0 = Pixel_Grab data not from pixel 0,0
1 = Pixel_Grab data is from pixel 0,0
OVF
Motion overflow, ΔY and/or ΔX buffer has overflowed since last report
0 = no overflow
1 = Overflow has occurred
LP_VALID
Laser Power Settings
0 = register 0x1a and register 0x1f or register 0x1c and register 0x1d do not
have complementary values
1 = laser power is valid
FAULT
Indicates that –VCSEL is shorted to GND or VDD
0 = no fault detected
1 = fault detected.
Note: PixArt recommends that registers 0x02, 0x03, 0x04and 0x05 be read sequentially.
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PixArt Imaging Inc.
E-mail: fae_service@pixart.com.tw
22
PIXART [ PIXART IMAGING INC. ]
