AR1100-I MICROCHIP [Microchip Technology], AR1100-I Datasheet - Page 17

• Manufacturer Part Number: AR1100-I
• Description: AR1100 Resistive USB and RS-232 Touch Screen Controller
• Manufacturer: MICROCHIP [Microchip Technology]

4.2.1.3
Touch report format:
TABLE 4-5:
For flexibility, the value and behavior of the ‘tip switch’
data entity (“T”) and touch reporting react to and is
defined by the ‘Touch mode’ parameter (similar to ‘pen
state’ bit in HID-GENERIC or UART).
TABLE 4-6:
4.2.2
PACKETs are used for all communications, other than
touch reports (i.e., configuration/control). COMMAND
packets (issued by the host) and RESPONSE packets
(issued by the device) have identical framework but dif-
fer slightly in format, as described below. In standard
operation, communication is initiated by the host then
acknowledged by the device. In some diagnostic sce-
narios (not discussed here) – a COMMAND packet
does not necessarily dictate a response from the
device and, in other cases, a RESPONSE packet may
be issued by the device unsolicited.
 2011 Microchip Technology Inc.
MODE
Report
BYTE
PM
PD
PU
0
1
2
3
4
5
P
X
Y
1
2
3
4
5
6
T
COMMAND PACKETS
Mode: HID-DIGITIZER
TOUCH REPORT FORMAT – DIGITIZER
TOUCH MODE OPTIONS – DIGITIZER
Pen down
Pen up
Pen move
Touch report
Tip switch
Proximity (in range) – always 1
X ordinate of touch location (12 bits)
X ordinate of touch location (12 bits)
PD
X
X
X
X
X
X
X7
Y7
7
0
0
0
0
SUPPORTED EVENT
PU
X
X
X
X
X
X
X6
Y6
6
0
0
0
0
PM
X5
Y5
X
X
X
X
5
0
0
0
0
NO REPORT
REPORT (T=0)
REPORT (T=1)
REPORT (T=1), REPORT (T=0)
REPORT (T=0), REPORT (T=1), REPORT (T=0)
REPORT (T=0), REPORT (T=1)
X4
Y4
4
0
0
0
0
BIT
X11
Y11
X3
Y3
3
0
0
BEHAVIOR
X10
Y10
X2
Y2
2
0
0
X1
X9
Y1
Y9
P
1
0
DS41606B-page 17
X0
X8
Y0
Y8
T
0
0