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參數資料
| 型號： | UCB1200 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Advanced modem/audio analog front-end |
| 中文描述： | 先進的調制解調器/音頻模擬前端 |
| 文件頁數： | 17/54頁 |
| 文件大小： | 1052K |
| 代理商： | UCB1200 |
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1998 Jul 22
17
Philips Semiconductors
Product specification
Advanced modem/audio analog front-end
UCB1200
In addition to the measurements mentioned above, the touch screen can also act as an interrupt source. In this mode
the X plate of the touch screen has to be powered and the Y plate has to be grounded. In this case the touch screen is
not biased by the active touch screen bias circuit, but by a resistor to V
DDA1
. This configuration simply biases the touch
screen and the UCB1200 does not consume power unless the touch screen is touched. The voltage on the X plate
terminals drops if the screen is pressed. This voltage drop is detected by Schmitt-trigger circuits, of which the outputs
are connected to the interrupt control block. A touch screen interrupt is generated either when the touch screen is
pressed (falling edge enabled) or when the touch screen is released (rising edge enabled). It can be used to activate the
system around the UCB1200 to start a touch screen read-out sequence. The internal Schmitt-trigger circuits are
connected to the TSPX and TSMX signals after the built in low pass filters. This reduces the number of spurious
interrupts, due to the coupling between the LCD screen and the touch screen sensors.
Each of the four touch screen signals can be selected as input for the built in 10 bit ADC, which is used to determine the
voltage on the selected touch screen pin. The flexible switch matrix and the multi- functional touch screen bias circuit
enables the user of the UCB1200 to set each desired touch screen configuration.
The setting of the touch screen bias circuit and the ADC input multiplexer is determined by the setting of TSC_MOD[n]
in the touch screen control register according the following table.
Fig.12 Touch screen setup for interrupt detection.
Vdda
Rint
schmitt trigger
tspx
tsmx
tspy
tsmy
schmitt trigger
相關PDF資料 |
PDF描述 |
|---|---|
| UCB1200BE | Advanced modem/audio analog front-end |
| UCB1300 | Advanced modem/audio analog front-end |
| UCB1300BE | Advanced modem/audio analog front-end |
| UCB1400BE | Audio codec with touch screen controller and power management monitor |
| UCB1400 | Audio codec with touch screen controller and power management monitor |
相關代理商/技術參數 |
參數描述 |
|---|---|
| UCB1200B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UCB1200B |
| UCB1200BE | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced modem/audio analog front-end |
| UCB1300 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced modem/audio analog front-end |
| UCB1300BE | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced modem/audio analog front-end |
| UCB1400 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Audio codec with touch screen controller and power management monitor |
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