MK712R IDT, Integrated Device Technology Inc, MK712R Datasheet - Page 2

• Manufacturer Part Number: MK712R
• Description: IC TOUCH SCREEN CTLR 28-SSOP
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Resistiver

Specifications of MK712R

• Touch Panel Interface: 4-Wire
• Number Of Inputs/keys: 1 TSC
• Resolution (bits): 12 b
• Data Interface: Parallel
• Voltage - Supply: 3 V ~ 5.5 V
• Current - Supply: 5mA
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Voltage Supply Source: Single Supply
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Operating Temperature: -
• Sampling Rate (per Second): -
• Lead Free Status / RoHS Status: Not Compliant, Contains lead / RoHS non-compliant

Pin Descriptions
Interrupts
IDT™ TOUCH SCREEN CONTROLLER
Number
MK712
TOUCH SCREEN CONTROLLER
Pin
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1
2
3
4
5
6
7
8
9
Interrupts are controlled by register 6 (see Register Description). The INT pin (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.
TOUCH
Name
CLKIN
GND
GND
GND
VDD
VDD
VDD
Pin
WR
INT
NC
XH
YH
RD
CS
D7
D6
D5
D4
D3
D2
D1
D0
XL
YL
A2
A1
A0
Touch Screen Pin Connect to X-high on touch screen. (Right side)
Touch Screen Pin Connect to X-low on touch screen. (Left side)
Touch Screen Pin Connect to Y-high on touch screen. (Top)
Touch Screen Pin Connect to Y-low on touch screen. (Bottom)
Pin Type
Output
Output
Power
Power
Power
Power
Power
Power
Input
Input
Input
Input
Input
Input
Input
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
—
No connect. Do not connect this pin to anything.
Touch signal. Goes low when screen is touched. Goes high when not touched.
Power Supply. Connect to +5 V or +3.3 V. (Connect all VDDs to same voltage)
Power Supply. Connect to +3.3 V.
Write enable. Active low.
Read enable. Active low.
Chip select. Active low.
Register address 2.
Register address 1.
Register address 0.
Clock input. Typically 14.3 MHz. Best if driven by an IDT clock synthesizer.
Data bit 7.
Data bit 6.
Power Supply. Connect to +5 V or +3.3 V. (Connect all VDDs to same voltage)
Data bit 5.
Data bit 4.
Data bit 3.
Data bit 2.
Data bit 1.
Data bit 0.
Interrupt. Goes high to signal an interrupt. Cleared on next read.
Connect to ground.
Connect to ground.
Connect to ground.
2
Pin Description
TOUCH SCREEN CONTROL
MK712
REV N 051310