ADNS-5700-H3NB Avago Technologies US Inc., ADNS-5700-H3NB Datasheet - Page 33

• Manufacturer Part Number: ADNS-5700-H3NB
• Description: USB SoC 3B 270deg Optical Sensor
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-5700-H3NB

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

Poll_Endpt1
Returns:
Default:
Addressed:
Configured:
Notes:
Special note on wLength:
33
bb xx yy zz tw
bb = button byte
Ignore request
Ignore request
Accept (NAK if no data; Send packet if available)
See also Get_HID_Input. Endpt will only stall if halt bit is set by Set_Feature_Endpt1. Details
of data packet are below
Endpt1 should be polled at least every 10 frames (mS). It is typically polled every 8 frames
on Windows machines. For internal testing, Endpt1 can be continuously polled if desired.
The chip will not generate any report packets unless in the Configured state.
If Endpt1 is currently empty, any motion or button change will be loaded into the Endpt1
buffers. Once the Endpt1 buffers are full, any further motion events will get accumulated.
When the Endpt1 buffers are later polled and emptied, the current accumulated X/Y/Z
values will be loaded into the Endpt1 buffers. After transferring their data, the accumula-
tion registers are reset so they are ready to start accumulating new motion events.
Button information is handled a bit differently. If the Endpt1 buffers are empty, and a button
change event occurs, the new button state is put into the Endpt1 buffers. At the same time,
the button state that is put in Endpt1 is copied for later use. While Endpt1 is full, changes
in button state are essentially ignored. When Endpt1 is emptied, if the current button state
is different than that which was last loaded into Endpt1, then the new state will be loaded
and a new copy saved. Basically, the button state that is loaded into Endpt1 is always the
current button state at that point in time. It should also be noted that there is hardware on
the chip to help de-bounce the buttons.
The wLength paramater in commands specifies the maximum number of bytes a device
should send back. The commands listed below are not able to handle a wLength of 0
correctly.
Get_Status_Device
Get_Status_Interface
Get_Status_Endpt0
Get_Status_Endpt1
Get_Configuration
Get_Interface
This chip will send one byte of data rather than none when wLength=0 is requested for the
above commands.
xx = X motion byte
yy = Y motion byte
zz = Z motion byte (if Z-Wheel)
tw = tilt wheel byte