參數資料
型號: P95020NQG
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: 電源管理
英文描述: 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC132
封裝: 10 X 10 MM, 0.85 MM HEIGHT, QFN-132
文件頁數: 22/169頁
文件大小: 4297K
代理商: P95020NQG
IDTP95020
Product Datasheet
September 2, 2011 Revision 1.3 Final
118
2011 Integrated Device Technology, Inc.
Measuring Touch Screen Location (X/Y)
When a PENDOWN valid event occurs, the touch screen
controller will automatically initiate an X/Y location
measurement. Each measurement can be configured to
be done 2AVERAGE_SEL_TSC times (as defined in the Average
Timer Select Register) and then averaged. The results of
the averaged conversions will then be stored into the
Result Registers provided the PENDOWN status remains
valid throughout a user-defined time (PENUP_TIMER).
X/Y measurements will continue to be made as long as
the PENDOWN status remains valid. Each successive
X/Y result will overwrite the previous location written to the
X Measurement and Y Measurement Result Registers.
Figure 39. Measure X-position
Figure 40. Measure Y-position
Measuring Touch Screen Pressure (Z1/Z2)
The user can configure whether pressure measurements
will be taken by writing to the Pressure Measure Control
bits in the TSC Configuration Register. When measuring
touch screen pressure, two parameters (Z1 and Z2) are
measured automatically.
Along with the X/Y
measurement, these values can be used to calculate the
touch-resistance (RTOUCH) with a formula such as:
=
1
Z
2
Z
4096
X
R
PLATE
X
TOUCH
(7)
Where RX-PLATE is the X-plate panel resistance.
Figure 41. Measure Z1-position
Figure 42. Measure Z2-position
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