ur7hcts2-s840 Semtech Corporation, ur7hcts2-s840 Datasheet - Page 3

• Manufacturer Part Number: ur7hcts2-s840
• Description: High-performance, Low Power Touch Screen Controller/digitizer - Semtech Corporation
• Manufacturer: Semtech Corporation

Copyright Semtech 2000-2001
DOC7-TS2-S840-DS-102
Mnemonic Pin #
VDD
VSS
VSS2
OSCIN
_OSCOUT
_RESET
XCLK
XDAT
_LB
_RB
XR1, XR2
YB1, YB2
YT1, YT1
XL1, XL2
VREF
SXL
SYT
SYB
SXR
_PWR_DOWN
XPWRS
_SS/_RTS
_ATN/_CTS
TXD
SCLK/ISEL
SOUT
RSVD1-2
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
12, 23
13, 22
14, 21
15, 20
19,26
11
10
17
18
24
25
31
32
30
16
8
7
9
6
5
1
2
3
4
27
28
29
Type
P
P
P
I
O
I
I/O (nd)
I/O (nd)
I/O (nd)
I/O (nd)
I/O
I/O
I/O
I/O
AI
AI
AI
AI
AI
I
AI
I/O
I
O
I
I/O
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
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
Right Button: active low
Sensor’s Excitation Driver: connect to X Right
Sensor’s Excitation Driver:connect toY Bottom
Sensor’s Excitation Driver: connect to X Left
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: connect to
switched power plane for the external pointing device
external mouse port is unused
Reserved: Keep open
Slave Select / Ready To Send: active low, host
ready to get data
data transfer
Data Output: Serial mode
Interface Select / SPI Clock: tie low for Serial
Data Output: SPI mode
Attention / Clear To Send: active low, request
Sensor’s Excitation Driver:connect to Y Top
or tie high if external mouse port is used; tie low if
www.semtech.com