MK712S

MK712S Datasheet

MK712

Part	Datasheet
MK712S	MK712S (pdf)

Related Parts	Information
MK712STR	MK712STR
MK712RTR	MK712RTR
MK712RITR	MK712RITR
MK712RI	MK712RI
MK712R	MK712R

PDF Datasheet Preview
TOUCH SCREEN CONTROLLER DATASHEET MK712 The MK712 Touch Screen Controller IC provides all the screen drive, A to D converter and control circuits to easily interface to 4-wire analog resistive touch screens. The IC continually monitors the screen waiting for a touch. In this mode, the supply current is typically 0.5µA. When the screen is touched, the IC performs analog to digital conversions to determine the location of the touch, stores the X and Y locations in the registers, and issues an interrupt. This process is repeated up to 197 times per second until no further screen touches are detected, at which time the low current mode is resumed. Block Diagram • Packaged in 28-pin SSOP 150 mil or 28-pin SOIC 300 • Industrial -30°C to +70°C and commercial 0 to +70°C and automotive -35°C to +85°C temperature ranges • Available in Pb lead free • Fully integrated, lowest power solution • Low standby current of 0.5µA typical at V • Active current while converting less than 10 mA • Resolves 350 dots/inch on display • Maximum speed of 197 points/second • Ratio metric conversion may eliminate screen calibration • Automatically wakes up and goes back to standby • V or 5 V supply • 12 bit A/D converter • Simplifies the writing of software for touch screens • Extended temperature range available • Capacitors are the only external components required • Touch screen is directly driven - no external transistors are required • Programmable conversion rate • A to D Converter is monotonic • Parallel interface NOTE EOL for non-green parts to occur on 5/13/10 per PDN U-09-01 Pin Assignment TOUCH CLKIN IDT TOUCH SCREEN CONTROLLER MK712 MK712 TOUCH SCREEN CONTROLLER TOUCH SCREEN CONTROL Pin Descriptions Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Pin Name NC INT TOUCH VDD XH XL YH YL GND WR RD CS A2 A1 A0 CLKIN D7 D6 GND VDD D5 D4 D3 D2 D1 D0 Interrupts Pin Type Pin Description Output Power Touch Screen Pin Touch Screen Pin Touch Screen Pin Touch Screen Pin Power Input I/O I/O Power I/O I/O I/O I/O I/O I/O No connect. Do not connect this pin to anything. Interrupt. Goes high to signal an interrupt. Cleared on next read. Touch signal. Goes low when screen is touched. Goes high when not touched. Power Supply. Connect to +5 V or V. Connect all VDDs to same voltage Power Supply. Connect to V. Connect to X-high on touch screen. Right side Connect to X-low on touch screen. Left side Connect to Y-high on touch screen. Top Connect to Y-low on touch screen. Bottom Connect to ground. Connect to ground. Write enable. Active low. Read enable. Active low. Chip select. Active low. Register address Register address Register address Clock input. Typically MHz. Best if driven by an IDT clock synthesizer. Data bit Data bit Connect to ground. Power Supply. Connect to +5 V or V. Connect all VDDs to same voltage Data bit Data bit Data bit Data bit Data bit Data bit Interrupts are controlled by register 6 see Register Description . The INT pin 2 goes high to signal an interrupt. Interrupts are then cleared by reading any register. However, if the MK712 is in the process of generating an interrupt during a read cycle, then the interrupt is not cleared and INT will stay high. This internal process may take 100ns, and so to guarantee that the interrupt is cleared, two successive read cycles may be necessary. IDT TOUCH SCREEN CONTROLLER MK712 MK712 TOUCH SCREEN CONTROLLER IC Operation TOUCH SCREEN CONTROL IDT TOUCH SCREEN CONTROLLER MK712 MK712 TOUCH SCREEN CONTROLLER TOUCH SCREEN CONTROL Ordering Information Part / Order Number MK712S* MK712STR* MK712SI* MK712SITR* MK712SLF MK712SLFTR MK712SILF MK712SILFTR MK712R* MK712RTR* MK712RLF MK712RLFTR MK712RI* MK712RITR* MK712RWLF MK712RWLFTR Marking MK712S MK712SI MK712SL MK712SIL MK712R MK712RLF MK712RI MK712RWLF Shipping Packaging Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Package 28-pin SOIC 28-pin SOIC 28-pin SOIC 28-pin SOIC 28-pin SOIC 28-pin SOIC 28-pin SOIC 28-pin SOIC 28-pin SSOP 28-pin SSOP 28-pin SSOP 28-pin SSOP 28-pin SSOP 28-pin SSOP 28-pin SSOP 28-pin SSOP Temperature 0 to +70° C 0 to +70° C -30 to +70° C -30 to +70° C 0 to +70° C 0 to +70° C -30 to +70° C -30 to +70° C 0 to +70° C 0 to +70° C 0 to +70° C 0 to +70° C -30 to +70° C -30 to +70° C -35 to +85° C -35 to +85° C *NOTE EOL for non-green parts to occur on 5/13/10 per PDN U-09-01 Parts that are ordered with a “LF” suffix to the part number are the Pb-Free configuration and are RoHS compliant. While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology IDT assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT does not authorize or warrant any IDT product for use in life support devices or critical medical instruments. IDT TOUCH SCREEN CONTROLLER MK712 MK712 TOUCH SCREEN CONTROLLER TOUCH SCREEN CONTROL Innovate with IDT and accelerate your future networks. Contact: For Sales 800-345-7015 408-284-8200 Fax 408-284-2775 For Tech Support Corporate Headquarters Integrated Device Technology, Inc. 2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners. Printed in USA

PDF Datasheet Preview

TOUCH SCREEN CONTROLLER

DATASHEET

MK712

The MK712 Touch Screen Controller IC provides all the screen drive, A to D converter and control circuits to easily interface to 4-wire analog resistive touch screens. The IC continually monitors the screen waiting for a touch. In this mode, the supply current is typically 0.5µA. When the screen is touched, the IC performs analog to digital conversions to determine the location of the touch, stores the X and Y locations in the registers, and issues an interrupt. This process is repeated up to 197 times per second until no further screen touches are detected, at which time the low current mode is resumed.

Block Diagram
• Packaged in 28-pin SSOP 150 mil or 28-pin SOIC 300
• Industrial -30°C to +70°C and commercial 0 to +70°C
and automotive -35°C to +85°C temperature ranges
• Available in Pb lead free
• Fully integrated, lowest power solution
• Low standby current of 0.5µA typical at V
• Active current while converting less than 10 mA
• Resolves 350 dots/inch on display
• Maximum speed of 197 points/second
• Ratio metric conversion may eliminate screen calibration
• Automatically wakes up and goes back to standby
• V or 5 V supply
• 12 bit A/D converter
• Simplifies the writing of software for touch screens
• Extended temperature range available
• Capacitors are the only external components required
• Touch screen is directly driven - no external transistors
are required
• Programmable conversion rate
• A to D Converter is monotonic
• Parallel interface

NOTE EOL for non-green parts to occur on 5/13/10 per PDN U-09-01

Pin Assignment

TOUCH

CLKIN

IDT TOUCH SCREEN CONTROLLER

MK712

MK712 TOUCH SCREEN CONTROLLER

TOUCH SCREEN CONTROL

Pin Descriptions

Pin Number
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Pin Name

NC INT TOUCH VDD XH XL YH YL GND WR RD CS A2 A1 A0 CLKIN D7 D6 GND VDD D5 D4 D3 D2 D1 D0

Interrupts

Pin Type

Pin Description

Output Power Touch Screen Pin Touch Screen Pin Touch Screen Pin Touch Screen Pin Power Input

I/O I/O Power I/O I/O I/O I/O I/O I/O

No connect. Do not connect this pin to anything. Interrupt. Goes high to signal an interrupt. Cleared on next read. Touch signal. Goes low when screen is touched. Goes high when not touched. Power Supply. Connect to +5 V or V. Connect all VDDs to same voltage Power Supply. Connect to V. Connect to X-high on touch screen. Right side Connect to X-low on touch screen. Left side Connect to Y-high on touch screen. Top Connect to Y-low on touch screen. Bottom Connect to ground. Connect to ground. Write enable. Active low. Read enable. Active low. Chip select. Active low. Register address Register address Register address Clock input. Typically MHz. Best if driven by an IDT clock synthesizer. Data bit Data bit Connect to ground. Power Supply. Connect to +5 V or V. Connect all VDDs to same voltage Data bit Data bit Data bit Data bit Data bit Data bit

Interrupts are controlled by register 6 see Register Description . The INT pin 2 goes high to signal an interrupt. Interrupts are then cleared by reading any register. However, if the MK712 is in the process of generating an interrupt during a read cycle, then the interrupt is not cleared and INT will stay high. This internal process may take 100ns, and so to guarantee that the interrupt is cleared, two successive read cycles may be necessary.

IDT TOUCH SCREEN CONTROLLER

MK712

MK712 TOUCH SCREEN CONTROLLER

IC Operation

TOUCH SCREEN CONTROL

IDT TOUCH SCREEN CONTROLLER

MK712

MK712 TOUCH SCREEN CONTROLLER

TOUCH SCREEN CONTROL
Ordering Information

Part / Order Number

MK712S* MK712STR*

MK712SI* MK712SITR* MK712SLF MK712SLFTR MK712SILF MK712SILFTR

MK712R* MK712RTR* MK712RLF MK712RLFTR

MK712RI* MK712RITR* MK712RWLF MK712RWLFTR

Marking

MK712S MK712SI MK712SL MK712SIL MK712R MK712RLF MK712RI MK712RWLF

Shipping Packaging

Tubes Tape and Reel

Tubes Tape and Reel

Tubes Tape and Reel

Tubes Tape and Reel

Tubes Tape and Reel

Tubes Tape and Reel

Tubes Tape and Reel

Tubes Tape and Reel

Package
28-pin SOIC 28-pin SOIC 28-pin SOIC 28-pin SOIC 28-pin SOIC 28-pin SOIC 28-pin SOIC 28-pin SOIC 28-pin SSOP 28-pin SSOP 28-pin SSOP 28-pin SSOP 28-pin SSOP 28-pin SSOP 28-pin SSOP 28-pin SSOP

Temperature
0 to +70° C 0 to +70° C -30 to +70° C -30 to +70° C 0 to +70° C 0 to +70° C -30 to +70° C -30 to +70° C 0 to +70° C 0 to +70° C 0 to +70° C 0 to +70° C -30 to +70° C -30 to +70° C -35 to +85° C -35 to +85° C
*NOTE EOL for non-green parts to occur on 5/13/10 per PDN U-09-01

Parts that are ordered with a “LF” suffix to the part number are the Pb-Free configuration and are RoHS compliant.

While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology IDT assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT does not authorize or warrant any IDT product for use in life support devices or critical medical instruments.

IDT TOUCH SCREEN CONTROLLER

MK712

MK712 TOUCH SCREEN CONTROLLER

TOUCH SCREEN CONTROL

Innovate with IDT and accelerate your future networks. Contact:

For Sales
800-345-7015 408-284-8200 Fax 408-284-2775

For Tech Support

Corporate Headquarters

Integrated Device Technology, Inc.
2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners. Printed in USA

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MK712S Datasheet file may be downloaded here without warranties.

Datasheet ID: MK712S 637486