AR1020T-I/SS Microchip Technology, AR1020T-I/SS Datasheet - Page 17

• Manufacturer Part Number: AR1020T-I/SS
• Description: IC TOUCH SCREEN CTRLR 20-SSOP
• Manufacturer: Microchip Technology
• Type: Resistiver

Specifications of AR1020T-I/SS

• Package / Case: 20-SSOP
• Touch Panel Interface: 4-Wire, 5-Wire, 8-Wire
• Number Of Inputs/keys: 3 Key
• Resolution (bits): 10 b
• Data Interface: I²C, Serial, SPI™
• Voltage - Supply: 3.3 V ~ 5.5 V
• Current - Supply: 17mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Voltage Supply Source: Single Supply
• Supply Voltage Range: 3.135V To 3.465V, 4.75V To 5.25V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: TSSOP
• No. Of Pins: 20
• Svhc: No SVHC (15-Dec-2010)
• Supply: RoHS Compliant
• Ic Function: Touch Screen Controller
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sampling Rate (per Second): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Changing the Number of Calibration Points
Method 1:
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Method 2:
Calibrating the Controller
The points used for the calibration is determined by the “CalType” registry entry described in
section “Changing the Calibration Type” below.
found in under the “Windows” directory on the CE Device.
Windows CE Calibration Registry Entries
Calibration parameters are created by Hcecal after calibration and are stored in the registry under
the following key:
Upon boot, if the registry entries are not located, the driver defaults to a default un-calibrated
state.
If no shortcut is present under “Programs” group, a shortcut to the calibration application may be
6. Configuring TSHARC Controller
In "Platform Builder 4.2", click on the FileView tab
Double click on the appropriate registry file <WINCEROOT>\PUBLIC\COMMON\OAK
Change the value of "CalType" appropriately
Rebuild and recreate run-time image.
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Using a registry editor for the target device, change the “CalType” registry item located
within the “HKEY_LOCAL_MACHINE\SOFTWARE\Hampshire\CurrentVersion\CalType”
branch according to the following:
Browse to the “Windows” directory using Windows Explorer and double-click the shortcut
“TouchIOCTL”. This will cause current TSHARC driver to re-read and apply the new
registry settings.
Select the Start menu
Under the “Programs” group select “TSHARC Calibration”
Touch all targets with activator tip for at least a couple seconds each.
[HKEY_LOCAL_MACHINE\SOFTWARE\Hampshire\CurrentVersion\Global]
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If Serial
If PS/2
If USB
For 3-point calibration, set value to "dword:3"
For 4-point calibration, set value to "dword:4"
For 7-point calibration, set value to "dword:7"
For 20-point calibration, set value to "dword:14"
For 3-point calibration, set value to "dword:3"
For 4-point calibration, set value to "dword:4"
For 7-point calibration, set value to "dword:7"
For 20-point calibration, set value to "dword:14"
\DRIVERS\TSHARC\TSHARCS\TSHARCS.reg
\DRIVERS\TSHARC\TSHARCP\TSHARCP.reg
\DRIVERS\TSHARC\TSHARCU\TSHARCU.reg
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