User manual

Operation
 2011 Microchip Technology Inc. DS41604A-page 21
3.3.3 Mode: HID-DIGITIZER
The USB ‘report’ format is given below:
For flexibility, the value and behavior of the ‘tip switch’ data entity (“T”) reflects the pen
up/down state (similar to the ‘Button 1’ description in HID-MOUSE mode.
3.4 LED INDICATOR
The Microchip AR1100 Touch Screen Controller Board is equipped with a LED indicator
to display controller status as follows:
TouchMode[2:0] = PU[2:0] Response to event PU (PEN/TOUCH UP)
b000 No touch report issued in response to the event
b001 Touch report w/ P=0
b010 Touch report w/ P=1
b011 Touch report w/ P=1, then Touch report w/ P=0
b100 Touch report w/ P=0, then Touch report w/ P=1, then Touch report w/ P=0
b101 Touch report w/ P=0, then Touch report w/ P=1
TABLE 3-3: TOUCH REPORT FORMAT – DIGITIZER
BYTE
BIT
7654321 0
1000000PT
200000000
3X7X6X5X4X3X2X1X0
40000X11X10X9X8
5Y7Y6Y5Y4Y3Y2Y1Y0
60000Y11Y10Y9Y8
Note 1: T1 Tip switch
P Proximity (in range) – always 1
X X ordinate of touch location (12 bits)
Y Y ordinate of touch location (12 bits)
TABLE 3-4: LED INDICATOR
Behavior Status
LED blinks slowly (once per second) Controller is powered, awake
and no touch is detected.
LED blinks rapidly (5 times per second) Controller detects a touch.
LED is off Controller has no power or is
asleep (suspended).