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TSC2005IYZLR データシート(PDF) 10 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
部品番号 TSC2005IYZLR
部品情報  1.6V to 3.6V, 12-Bit, Nanopower, 4-Wire TOUCH SCREEN CONTROLLER with SPI??Interface
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メーカー  BURR-BROWN [Burr-Brown (TI)]
ホームページ  http://www.burr-brown.com
Logo BURR-BROWN - Burr-Brown (TI)

TSC2005IYZLR データシート(HTML) 10 Page - Burr-Brown (TI)

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OVERVIEW
X+
Y+
X-
Y-
AuxilaryInput
AGND
AGND
TSC2005
SNSGND
DGND
1 F
m
1.6VDC
0.1 F
m
Touch
Screen
GPIO
GPIO
SDI
SCLK
SDO
CS
Host
Processor
PINTDAV
RESET
SDO
SCLK
1 F
m
0.1 F
m
1 F
m
0.1 F
m
(
isoptional;
softwareimplementation
pollingoftheStatus
registerispossible)
PINTDAV
TSC2005
SBAS379A – DECEMBER 2006 – REVISED MAY 2007
The TSC2005 is an analog interface circuit for a human interface touch screen device. A register-based
architecture eases integration with microprocessor-based systems through a standard SPI bus. All peripheral
functions are controlled through the registers and onboard state machines. The TSC2005 features include:
• Very low-power touch screen controller
• Very small onboard footprint
• Relieves host from tedious routine tasks by flexible preprocessing, saving resources for more critical tasks
• Ability to work on very low supply voltage
• Minimal connection interface allows easiest isolation and reduces the number of dedicated I/O pins required
• Miniature, yet complete; requires no external supporting component. (NOTE: Although the TSC2005 can use
an external reference, it is also possible to use SNSVDD as the reference.)
• Enhanced ESD up to 6kV
The TSC2005 consists of the following blocks (refer to the block diagram on the front page):
• Touch Screen Interface
• Auxiliary Input (AUX)
• Temperature Sensor
• Acquisition Activity Preprocessing
• Internal Conversion Clock
• SPI Interface
Communication with the TSC2005 is done via an SPI serial interface. The TSC2005 is an SPI slave device;
therefore, data are shifted into or out of the TSC2005 under control of the host microprocessor, which also
provides the serial data clock.
Control of the TSC2005 and its functions is accomplished by writing to different registers in the TSC2005. A
simple serial command protocol, compatible with SPI, is used to address these registers.
The measurement result is placed in the TSC2005 registers and may be read by the host at any time. This
preprocessing frees up the host so that resources can be redirected for more critical tasks. Two optional signals
are also available from the TSC2005 to indicate that data is available for the host to read. PINTDAV is a
programmable interrupt/status output pin that can be programmed to indicate a pen-touch, data available, or the
combination of both. Figure 19 shows a typical application of the TSC2005.
Figure 19. Typical Circuit Configuration
10
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