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參數(shù)資料
| 型號： | TSC2117IRGZR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, QCC48 |
| 封裝： | 7 X 7 MM, GREEN, PLASTIC, VQFN-48 |
| 文件頁數(shù)： | 170/192頁 |
| 文件大小： | 2728K |
| 代理商： | TSC2117IRGZR |
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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
Figure 5-46. Circular Buffer
Converted data is automatically written into the FIFO. To control the writing, reading and interrupt process,
a write pointer (WRPTR), a read pointer (RDPTR), and a trigger pointer (TGPTR) are used. The read
pointer always shows the location that is read next. The write pointer indicates the location in which the
next converted data is to be written. The trigger pointer indicates the location at which an interrupt is
generated if the write pointer reaches that location. Trigger level is the number of the data values needed
to be present in the FIFO before generating an interrupt. For example, in X–Y continuous-scan mode with
trigger level set to 8, the TSC2117 generates an interrupt after writing (X1, Y1), (X2, Y2), (X3, Y3), (X4,
Y4), i.e., four data-pairs or eight data values. Figure 5-46 shows the case when the trigger level is
programmed as 32. On resetting the buffer mode, RDPTR moves to location 1, WRPTR moves to location
1, and TGPTR moves to a location equal to the programmed trigger level.
The user can select the input or input sequence to be converted by writing to page 3/register 3,
bits D5–D2. The converted values are written in a predefined sequence to the circular buffer. The user has
flexibility to program a specific trigger level in order to choose the configuration which best fits the
application. When the number of converted data values written in FIFO becomes equal to the
programmed trigger level, then the device generates an interrupt signal on GPIO1 or GPIO2. In buffer
mode, the user should program this pin as Data Available. In buffer mode, touch-screen-related
conversions (X, Y, Z1, Z2) are allowed only in self-controlled mode and nontouch-screen-related
conversions (VBAT, AUX1, AUX2, TEMP1, TEMP2) are allowed only in host-controlled mode.
Buffer mode can be used in single-shot conversion or continuous-conversion mode.
In single-shot conversion mode, once the number of data values written reaches the programmed trigger
level, the TSC2117 generates an interrupt and waits for the user to start reading. As soon as the user
starts reading the first data value from the last converted set, the TSC2117 clears the interrupt and starts
a new set of conversions, and the trigger pointer is incremented by the programmed trigger level. An
interrupt is generated again when the trigger condition is satisfied.
In continuous-conversion mode, once the number of data values written reaches the programmed trigger
level, the TSC2117 generates an interrupt. It immediately starts a new set of conversions, and the trigger
pointer is incremented by the programmed trigger level. An interrupt is cleared either by writing the next
converted data value into the FIFO or by starting to read from the FIFO.
APPLICATION INFORMATION
79
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| TSC2117IRGZT | 功能描述:觸摸屏轉換器和控制器 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 |
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