AR1100-I/SO Microchip Technology, AR1100-I/SO Datasheet - Page 14

• Manufacturer Part Number: AR1100-I/SO
• Description: 58T8312
• Manufacturer: Microchip Technology

Specifications of AR1100-I/SO

• Resolution (bits): 12bit
• Supply Voltage Range: 3.3V To 5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: SOIC
• No. Of Pins: 20

AR1100 RESISTIVE USB AND RS-232 TOUCH SCREEN CONTROLLER
4.1.3
The USB can enumerate as one of three ‘devices’ (or
device types) identified by a byte in EEPROM. See
Table
TABLE 4-1:
Once
signaled/commanded to re-enumerate as the same
device or to one of the other two. In processing the
command, the AR1100 writes the desired USB device
type to EEPROM prior to detaching from the bus and
executing a Reset. The SET_FEATURE control transfer
or a WRITE standard data transfer (via the Interrupt
end point) is used to convey the command (described
in
4.2
Data protocol utilizes multi-byte packet transfers in two
categories/formats:
1.
2.
4.2.1
Touch reports always originate from the AR1100 and
are transmitted in response to touch detection. The
format of the touch report is mode-dependent.
4.2.1.1
The ‘standard’, 5-byte touch report is formatted as in
Table 4-2
TABLE 4-2:
DS41606A-page 14
HID-GENERIC
HID-MOUSE
HID-DIGITIZER
Note:
Section 5.0,
Touch reports
Command packets
4-1.
NAME
enumerated,
BYTE
Data Protocol
:
R
P
X
Y
1
2
3
4
5
USB MODE
The HID-MOUSE requires SET_FEATURE
and does not support a data WRITE.
TOUCH REPORTS
Mode: UART, HID-GENERIC
Commands).
USB IDs
TOUCH REPORT FORMAT – GENERIC
Proprietary (AR1000-style)
Mouse, absolute coordinates 0-4095
Single-input digitizer
the
Pen state - 1: Pen down - 0: Pen up
(Reserved)
X ordinate of touch location (12 bits)
Y ordinate of touch location (12 bits)
7
1
0
0
0
0
USB
device
DESC
X6
Y6
R
6
0
0
can
Preliminary
be
X5
Y5
R
5
0
0
X11
Y11
X4
Y4
R
4
CLASS
HID
HID
HID
BIT
X10
Y10
X3
Y3
R
3
x04D8
x04D8
x04D8
VIDL
X2
X9
Y2
Y9
 2011 Microchip Technology Inc.
R
2
x0C01
x0C02
x0C03
PID
X1
X8
Y1
Y8
R
1
SPEED
FULL
FULL
FULL
X0
X7
Y0
Y7
P
0