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參數資料
| 型號： | TSC2046IRGVRG4 |
| 英文描述： | Low Voltage I/O TOUCH SCREEN CONTROLLER |
| 中文描述： | 低電壓I / O觸摸屏控制器 |
| 文件頁數： | 13/23頁 |
| 文件大?。?/td> | 554K |
| 代理商： | TSC2046IRGVRG4 |
TSC2046
SBAS265C
13
www.ti.com
MODE—
The mode bit sets the resolution of the ADC. With
this bit low, the next conversion has 12 bits of resolution,
whereas with this bit high, the next conversion has 8 bits of
resolution.
SER/DFR
—
The
SER/DFR
bit controls the reference mode,
either single-ended (high) or differential (low). The differential
mode is also referred to as the ratiometric conversion mode
and is preferred for X-Position, Y-Position, and Pressure-
Touch measurements for optimum performance. The refer-
ence is derived from the voltage at the switch drivers, which
is almost the same as the voltage to the touch screen. In this
case, a reference voltage is not needed as the reference
voltage to the ADC is the voltage across the touch screen. In
the single-ended mode, the converter reference voltage is
always the difference between the V
REF
and GND pins (see
Tables I and II, and Figures 2 through 5 for further informa-
tion).
If X-Position, Y-Position, and Pressure-Touch are measured
in the single-ended mode, an external reference voltage is
needed. The TSC2046 must also be powered from the
external reference. Caution should be observed when using
the single-ended mode such that the input voltage to the
ADC does not exceed the internal reference voltage, espe-
cially if the supply voltage is greater than 2.7V.
NOTE: The differential mode can only be used for X-Position,
Y-Position, and Pressure-Touch measurements. All other
measurements require the single-ended mode.
PD0 and PD1—
Table V describes the power-down and the
internal reference voltage configurations. The internal refer-
ence voltage can be turned on or off independently of the
ADC. This can allow extra time for the internal reference
voltage to settle to the final value prior to making a conver-
sion. Make sure to also allow this extra wake-up time if the
internal reference is powered down. The ADC requires no
wake-up time and can be instantaneously used. Also note
Control Byte
The control byte (on DIN), as shown in Table III, provides the
start conversion, addressing, ADC resolution, configuration,
and power-down of the TSC2046. Figure 9 and Tables III and
IV give detailed information regarding the order and descrip-
tion of these control bits within the control byte.
Bit 7
(MSB)
Bit 0
(LSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
S
A2
A1
A0
MODE
SER/DFR
PD1
PD0
TABLE III. Order of the Control Bits in the Control Byte.
BIT
NAME
DESCRIPTION
7
S
Start bit. Control byte starts with first high bit on DIN.
A new control byte can start every 15th clock cycle
in 12-bit conversion mode or every 11th clock cycle
in 8-bit conversion mode (see Figure 13).
6-4
A2-A0
Channel Select bits. Along with the
SER/DFR
bit, these
bits control the setting of the multiplexer input, touch driver
switches, and reference inputs (see Tables I and II).
3
MODE
12-Bit/8-Bit Conversion Select bit. This bit controls
the number of bits for the next conversion: 12-bits
(low) or 8-bits (high).
2
SER/DFR
Single-Ended/Differential Reference Select bit. Along
with bits A2-A0, this bit controls the setting of the
multiplexer input, touch driver switches, and reference
inputs (see Tables I and II).
1-0
PD1-PD0
Power-Down Mode Select bits. Refer to Table V for
details.
TABLE IV. Descriptions of the Control Bits within the Control Byte.
FIGURE 9. Conversion Timing, 24 Clocks-per-Conversion, 8-Bit Bus Interface. No DCLK delay required with dedicated serial port.
t
ACQ
Acquire
Idle
Conversion
Idle
1
DCLK
CS
8
1
11
DOUT
BUSY
Drivers 1 and 2
(1)
(SER/DFR High)
Drivers 1 and 2
(1, 2)
(SER/DFR Low)
(MSB)
(START)
(LSB)
A2
S
On
On
Off
Off
Off
Off
DIN
A1
A0
MODE
SER/
DFR
PD1 PD0
10
9
8
7
6
5
4
3
2
1
0
Zero Filled...
8
1
8
NOTES: (1) For Y-Position, Driver 1 is on X+ is selected, and Driver 2 is off. For X-Position, Driver 1 is off, Y+ is selected,
and Driver 2 is on. Y– will turn on when power-down mode is entered and PD0 = 0. (2) Drivers will remain on if PD0 = 1 (no
power down) until selected input channel, reference mode, or power-down mode is changed, or CS is high.
Initiate START—
The first bit, the S bit, must always be high
and initiates the start of the control byte. The TSC2046
ignores inputs on the DIN pin until the start bit is detected.
Addressing—
The next three bits (A2, A1, and A0) select the
active input channel(s) of the input multiplexer (see Tables I, II,
and Figure 2), touch screen drivers, and the reference inputs.
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| TSC2046 | Low Voltage I/O TOUCH SCREEN CONTROLLER |
| TSC2046IGQCR | CONTINUOUS TIME UNIPOLAR SWITCH |
| TSC2046IGQCR-90 | Hall Effect Switch IC; Operate Point Typ:100G; Release Point Typ:45G; Package/Case:3-SOT-23; Leaded Process Compatible:Yes; Operate Point Max:175G; Peak Reflow Compatible (260 C):Yes; Release Point Min:10G RoHS Compliant: Yes |
| TSC2046IPW | Hall Effect Switch IC; Operate Point Typ:100G; Release Point Typ:45G; Package/Case:3-SIP; Supply Voltage Max:24V; Leaded Process Compatible:Yes; Operate Point Max:175G; Peak Reflow Compatible (260 C):Yes; Release Point Min:10G RoHS Compliant: Yes |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TSC2046IRGVT | 功能描述:觸摸屏轉換器和控制器 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 數據速率: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 |
| TSC2046IRGVTG4 | 功能描述:觸摸屏轉換器和控制器 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 數據速率: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 |
| TSC2046IZQCR | 功能描述:觸摸屏轉換器和控制器 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 數據速率: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 |
| TSC2046IZQCR-90 | 功能描述:觸摸屏轉換器和控制器 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 數據速率: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 |
| TSC2046IZQCT | 功能描述:觸摸屏轉換器和控制器 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 數據速率: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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