UR7HCTS2-P840-FG Semtech Corporation, UR7HCTS2-P840-FG Datasheet - Page 3

• Manufacturer Part Number: UR7HCTS2-P840-FG
• Description: High-Performance/ Low Power PS/2 Touch Screen Controller/Digitizer
• Manufacturer: Semtech Corporation

Copyright ©1999-2001 Semtech Corporation
DOC7-TS2-P840-DS-106
Mnemonic
VDD
VSS
VSS2
OSCIN
_OSCOUT
_RESET
HDAT
HCLK
XCLK
XDAT
_LB
_RB
XR1
YB1
YT1
XL1
XL2
YT2
YB2
XR2
VREF
SXL
SYT
SYB
SXR
_POWER_
DOWN
XPWRS
RSVD1-5
Note: An underscore before a pin mnemonic denotes an active low signal.
Pin Types Legend: AI=Analog Input; I=Input; O=Output; I/O=Input or Output;
I/O (nd)=Input or Output with N-channel Open Drain driver
PIN DEFINITIONS
3
27-29
Pin #
11
10
19
16
17
18
24
25
12
13
14
15
20
21
22
23
31
32
30
4, 26
8
7
9
6
5
1
2
3
Type
P
P
P
I
O
I
I/O (nd)
I/O (nd)
I/O (nd)
I/O (nd)
I/O (nd)
I/O (nd)
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
AI
AI
AI
AI
AI
I
AI
I/O
Name and Function
Power Supply
Ground
Ground
Oscillator Input: external clock input or one
side of the Ceramic Resonator with built-in Load
Capacitors
Oscillator Output: open for external clock
input or other side of the Ceramic Resonator with
built-in Load Capacitors
Reset: apply 0V to provide orderly start-up
Mouse Data: connects to Host’s data line
Mouse Clock: connects to Host’s clock line
External Mouse Clock: PS/2 clock signal from
external mouse; keep open if unused
External Mouse Data: PS/2 data signal from
external mouse; keep open if unused
Left Button: active low, strobed sampling
Right Button: active low, strobed sampling
Sensor’s Excitation Driver: connect to X Right
Sensor’s Excitation Driver: connect to Y Bottom
Sensor’s Excitation Driver: connect to Y Top
Sensor’s Excitation Driver: connect to X Left
Sensor’s Excitation Driver: connect to X Left
Sensor’s Excitation Driver: connect to Y Top
Sensor’s Excitation Driver: connect to Y Bottom
Sensor’s Excitation Driver: connect to X Right
Reference Voltage for built-in A/D
Sense line: for X Left
Sense line: for Y Top
Sense line: for Y Bottom
Sense line: for X Right
Hardware Power Down: tie high if unused
External Mouse Power Sense: tie high if unused
and external mouse port is used; tie low if external
mouse port is unused
Reserved
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