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參數(shù)資料
| 型號： | TSC2046IZQCR-90 |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:3; Series:; Body Material:Aluminum; Connector Shell Size:8; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:8-3 |
| 中文描述： | 低電壓I / O觸摸屏控制器 |
| 文件頁數(shù)： | 14/23頁 |
| 文件大?。?/td> | 554K |
| 代理商： | TSC2046IZQCR-90 |
TSC2046
SBAS265C
14
www.ti.com
PENIRQ
+V
CC
50k
or
90k
On
Y+ or X+ drivers on,
or TEMP0, TEMP1
measurements activated.
Y+
X+
Y–
TEMP0
TEMP1
TEMP
DIODE
High except
when TEMP0,
TEMP1 activated.
+V
CC
Level
Shifter
IOVDD
FIGURE 10.
PENIRQ
Functional Block Diagram.
processor. During the measurement cycle for X-, Y-, and Z-
Position, the X+ input is disconnected from the
PENIRQ
internal pull-up resistor. This is done to eliminate any leak-
age current from the internal pull-up resistor through the
touch screen, thus causing no errors.
Furthermore, the
PENIRQ
output is disabled and low during
the measurement cycle for X-, Y-, and Z-Position. The
PENIRQ
output is disabled and high during the measurement cycle for
battery monitor, auxiliary input, and chip temperature. If the
last control byte written to the TSC2046 contains PD0 = 1, the
pen-interrupt output function is disabled and is not able to
detect when the screen is touched. In order to re-enable the
pen-interrupt output function under these circumstances, a
control byte needs to be written to the TSC2046 with PD0 = 0.
If the last control byte written to the TSC2046 contains PD0
= 0, the pen-interrupt output function is enabled at the end of
the conversion. The end of the conversion occurs on the
falling edge of DCLK after bit 1 of the converted data is
that the status of the internal reference power-down is
latched into the part (internally) with BUSY going high. In
order to turn the reference off, an additional write to the
TSC2046 is required after the channel has been converted.
PENIRQ
OUTPUT
The pen-interrupt output function is shown in Figure 10. While
in power-down mode with PD0 = 0, the Y– driver is on and
connects the Y-plane of the touch screen to GND. The
PENIRQ
output is connected to the X+ input through two
transmission gates. When the screen is touched, the X+ input
is pulled to ground through the touch screen.
In most of the TSC2046 models, the internal pullup resistor
value is nominally 50k
, but this may vary between 36k
and 67k
given process and temperature variations. In
order to assure a logic low of 0.35VDD is presented to the
PENIRQ
circuitry, the total resistance between the X+ and
Y- terminals must be less than 21k
.
The -90 version of the TSC2046 uses a nominal 90k
pullup
resistor, which allows the total resistance between the X+
and Y- terminals to be as high as 30k
.
Note that the higher
pullup resistance will cause a slower response time of the
PENIRQ
to a screen touch, so user software should take this
into account.
The
PENIRQ
output goes low due to the current path through
the touch screen to ground, which initiates an interrupt to the
PD1
PD0
PENIRQ
DESCRIPTION
0
0
Enabled
conversion is finished, the converter enters a
low-power mode. At the start of the next conver-
sion, the device instantly powers up to full power.
There is no need for additional delays to ensure
full operation, and the very first conversion is
valid. The Y– switch is on when in power-down.
0
1
Disabled
Reference is off and ADC is on.
1
0
Enabled
Reference is on and ADC is off.
1
1
Disabled
Device is always powered. Reference is on and
ADC is ON.
TABLE V. Power-Down and Internal Reference Selection.
FIGURE 11. Conversion Timing, 16 Clocks-per-Conversion, 8-Bit Bus Interface. No DCLK delay required with dedicated
serial port.
1
DCLK
CS
8
1
11
DOUT
BUSY
S
DIN
Control Bits
S
Control Bits
10
9
8
7
6
5
4
3
2
1
0
11 10
9
8
1
1
8
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| TSC2046IZQCT | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 4-Wire w/low voltage digital I/O 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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| TSC2059CXG | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:General Purpose NPN Transistor |
| TSC2059CXK | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:General Purpose NPN Transistor |
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