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參數(shù)資料
| 型號： | TSC2200 |
| 英文描述： | PDA ANALOG INTERFACE CIRCUIT |
| 中文描述： | 掌上電腦模擬接口電路 |
| 文件頁數(shù)： | 20/40頁 |
| 文件大?。?/td> | 645K |
| 代理商： | TSC2200 |
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TSC2200
SBAS191F
FIGURE 8. X- and Y-Coordinate Touch Screen Scan, Initiated by Touch.
The time needed to get a complete X/Y-coordinate reading
can be calculated by:
(3)
t
2.5 s + 2 t
+ t
+ t
2N
N
1
f
s
COORDINATE
PVS
PRE
SNS
AVG
BITS
CONV
=
(
)
+
+
μ
4 4
where,
t
COORDINATE
= Time to Complete X/Y-Coordinate Reading
t
PVS
= Panel Voltage Stabilization time (see Table XII)
t
PRE
= Precharge time (see Table XXII)
t
SNS
= Sense time (see Table XXIII)
N
AVG
= Number of Averages (see Table X); for no averag-
ing, N
AVG
= 1
N
BITS
= Number of Bits of Resolution (see Table IX)
f
CONV
= A/D Converter Clock Frequency (see Table XI)
If the pressure of the touch is also to be measured, the
process will continue in the same way, but measuring the Z
1
and Z
2
values, and placing them in the Z
1
and Z
2
registers
(see Figure 9). As before, this process time depends upon
the settings described above. The time for a complete X, Y,
Z
1
, and Z
2
coordinate reading is given by:
(4)
t
4.75 s + 3 t
+ t
+ t
4N
N
1
f
s
COORDINATE
PVS
PRE
SNS
AVG
BITS
CONV
=
(
)
+
+
μ
4 4
Screen
Touch
Issue Interrupt
PENIRQ
Go to Host-Controlled
Conversion
Touch Screen Scan
X and Y
PENIRQ Initiated
Done
Done
No
No
Yes
Yes
Yes
No
No
Yes
Is Data
Averaging Done
Is Screen
Touched
Is Panel Voltage
Stabilization Done
Turn On Drivers: Y+, Y
–
Start Clock
Store X-Coordinates in
X-Register
Power Down A/D Converter
Power Up A/D Converter
Reset PENIRQ and
Scan Trigger
Turn Off Clock
Convert X-Coordinates
Is PSM = 1
No
Yes
No
Is Screen
Touched
Is Data
Averaging Done
No
Yes
Yes
Is Panel Voltage
Stabilization Done
Convert Y-Coordinates
Turn On Drivers: X+, X
–
Power Up A/D Converter
Store Y-Coordinates in
Y-Register
Reset PENIRQ and
Scan Trigger
Power Down A/D Converter
Turn Off Clock
Issue Data Available
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| TSC2200IPWG4 | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 Prog 4-Wire w/12-Bit 125KHz ADC & Key Ifc RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數(shù)據(jù)速率:140 SPS 分辨率:10 bit 接口類型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20 |
| TSC2200IPWR | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 Prog 4-Wire w/12-Bit 125KHz ADC & Key Ifc RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數(shù)據(jù)速率:140 SPS 分辨率:10 bit 接口類型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20 |
| TSC2200IPWRG4 | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 Prog 4-Wire w/12-Bit 125KHz ADC & Key Ifc RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數(shù)據(jù)速率:140 SPS 分辨率:10 bit 接口類型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20 |
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