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參數(shù)資料
| 型號(hào)： | TSC2117IRGZR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, QCC48 |
| 封裝： | 7 X 7 MM, GREEN, PLASTIC, VQFN-48 |
| 文件頁(yè)數(shù)： | 109/192頁(yè) |
| 文件大?。?/td> | 2728K |
| 代理商： | TSC2117IRGZR |
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5.2.1.2 Device Start-Up Lockout Times
5.2.1.3 PLL Start-Up
5.2.1.4 Power-Stage Reset
5.2.1.5 Software Power Down
5.2.2
Audio Analog I/O
5.3 miniDSP
TSC2117
Low-Power Audio Codec With Embedded miniDSP, Stereo Class-D
Speaker Amplifier, and Smart Four-Wire Touch-Screen Controller
www.ti.com
SLAS550A – APRIL 2009 – REVISED JUNE 2009
After the TSC2117 is initialized through hardware reset at power-up or software reset, the internal
memories are initialized to default values. This initialization takes place within 1 ms after pulling the
RESET signal high. During this initialization phase, no register-read or register-write operation should be
performed on ADC or DAC coefficient buffers. Also, no block within the codec should be powered up
during the initialization phase.
Whenever the PLL is powered up, a start-up delay of approximately of 10 ms occurs after the power-up
command of the PLL and before the clocks are available to the codec. This delay is to ensure stable
operation of the PLL and clock-divider logic.
The power-stage-only reset is used to reset the device after an overcurrent latching shutdown has
occurred. Using this reset re-enables the output stage without resetting all of the registers in the device.
Each of the four power stages has its own dedicated reset bit. The headphone power-stage reset is
performed by setting page 1/register 31, bit D7 for HPL and by setting page 1/register 31, bit D6 for HPR.
The speaker power-stage reset is performed by setting page 1/register 32, bit D7 for SPLP and SPLN,
and by setting page 1/register 32, bit D6 for SPRP and SPRN.
By default, all circuit blocks are powered down following a reset condition. Hardware power up of each
circuit block can be controlled by writing to the appropriate control register. This approach allows the
lowest power-supply current for the functionality required. However, when a block is powered down, all of
the register settings are maintained as long as power is still being applied to the device. The TSC2117
touch-detection circuitry is enabled by default, and it can be powered down by writing to page 3/register 4,
bit D7.
The TSC2117 has a stereo audio DAC and a monaural ADC. It supports a wide range of analog interfaces
to support different headsets and analog outputs. The TSC2117 has features to interface output drivers
(8-
, 16-, 32-) and a microphone PGA with AGC control. A special circuit has also been included in
the TSC2117 to insert a short key-click sound into the stereo audio output. The key-click sound is used to
provide feedback to the user when a particular button is pressed or item is selected. The specific sound of
the keyclick can be adjusted by varying several register bits that control its frequency, duration, and
amplitude. See Key-Click Functionality With Beep Generator, Section 5.6.5
The TSC2117 features two miniDSP cores. The first miniDSP core is tightly coupled to the ADC; the
second miniDSP core is tightly coupled to the DAC. The fully programmable algorithms for the miniDSP
must be loaded into the device after power up. The miniDSPs have direct access to the digital stereo
audio stream on the ADC and on the DAC side, offering the possibility for advanced, very low-group-delay
DSP algorithms.
The ADC miniDSP has 384 programmable instructions, 256 data memory locations, and 128
programmable coefficients. The DAC miniDSP has 1024 programmable instructions, 896 data memory
locations, and 512 programmable coefficients (in the adaptive mode, each bank has 256 programmable
coefficients).
APPLICATION INFORMATION
23
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| TSC2117IRGZT | 功能描述:觸摸屏轉(zhuǎn)換器和控制器 4-Wire Touch Screen Controller 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 |
| TSC2117IRGZT | 制造商:Texas Instruments 功能描述:Touch Screen Controller IC |
| TSC22 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EURO TERMINAL BLOCKS |
| TSC2200 | 制造商:BB 制造商全稱:BB 功能描述:PDA ANALOG INTERFACE CIRCUIT |
| TSC2200EVM | 功能描述:觸摸傳感器開發(fā)工具 Touch Screen Contr Eval Mod RoHS:否 制造商:Cypress Semiconductor 工具用于評(píng)估: 接口類型: 工作電壓: 最大工作溫度: |
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