AR1100BRD Microchip Technology, AR1100BRD Datasheet - Page 19

• Manufacturer Part Number: AR1100BRD
• Description: 58T8314
• Manufacturer: Microchip Technology

Specifications of AR1100BRD

• Features: Automatically Detects Communication Type, Dynamic Rise Time And Sampling Capability
• Application Sub Type: Touch-Screen Controllers
• Kit Application Type: Communication & Networking

3.1
3.2
3.3
 2011 Microchip Technology Inc.
CONFIGURATION
COMMUNICATION
DATA FORMAT
The AR1100 Touch Screen Controller Board is operational out of the box.
Communication protocol is detected automatically (as described below) and the
Mechanical mode jumper selects between 5-wire (jumper on) and 4/8-wire (jumper off).
If a USB cable is connected, the AR1100 Touch Screen Controller Board will default to
Mouse mode (HID-MOUSE). Additional configuration is possible (but generally, not
necessary) using commands described in the AR1100 IC data sheet. The Microchip AR
Configuration Utility Software can be used with the AR1100 Touch Screen Controller
Board to modify (fine tune) operational parameters, change the ‘default’ USB device or
actually update the control firmware. Any change made to the factory defaults is saved
to internal, nonvolatile memory.
The AR1100 Touch Screen Controller Board supports both RS-232 and USB. The con-
troller will automatically detect and select between the two at power-up. The USB sup-
port is further defined to be one of three devices – HID-GENERIC, HID-MOUSE or
HID-DIGITIZER – the controller can be configured to power-up as any of the three
devices but the factory default is HID-MOUSE.
The touch report data format for each communication protocol is defined below. The
HID-MOUSE and HID-DIGITIZER are compatible with intrinsic drivers of Windows
and Windows 7, respectively. The HID-GENERIC and RS-232 protocols require
custom handling.
3.3.1
TABLE 3-1:
1
2
3
4
5
Note 1:
BYTE
1
0
0
0
0
P
Mode: HID-GENERIC, RS-232
R
X
Y
7
Chapter 3. Operation
Pen state 1: Pen down; 0: Pen up
(Reserved)
X ordinate of touch location (12 bits)
Y ordinate of touch location (12 bits)
TOUCH REPORT FORMAT – GENERIC
R
X6
0
Y6
0
6
mTouch™ AR1100 User’s Guide
R
X5
X11
Y5
Y11
5
R
X4
X10
Y4
Y10
4
BIT
R
X3
X9
Y3
Y9
3
R
X2
X8
Y2
Y8
2
R
X1
X7
Y1
Y7
1
P
X0
X6
Y0
Y6
0
DS41604A-page 19
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