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SH1475 Schematic ( PDF Datasheet ) - Semtech

Teilenummer SH1475
Beschreibung Single-Axis Capacitive Touch Sensor Controller
Hersteller Semtech
Logo Semtech Logo 




Gesamt 11 Seiten
SH1475 Datasheet, Funktion
SH1475
Single-Axis Cwawpw.aDactaiSthievete4U.com
Touch Sensor Controller
HID & SYSTEM MANAGEMENT PRODUCTS
PRELIMINARY
DESCRIPTION
FEATURES
The SH1475 single-axis capacitive
touch sensor controller is a cost-
effective, single-dimension
capacitive position analyzer with a
full-duplex SPI® interface. The
SH1475 is ideal for handheld
devices such as MP3 players.
The SH1475 uses an advanced
algorithm for enhanced motion
control interfacing PCB-based
capacitive sensor. The SH1475
includes a signal conditioning
circuit for a low cost, simple and
real estate-saving implementation.
Just a few additional low-tolerance
external components are needed
for a complete solution.
• Full-duplex SPI Interface
• PCB-based capacitive sensor
• Five switches
• 2.7 V – 5.5 V
APPLICATIONS
• Portable media players
• Portable media centers
PIN ASSIGNMENTS
• Low power consumption: 1 µA in
standby state (typical)
• Royalty-free and cost-effective
• Customization available
• Small 6 mm x 6 mm 36-lead
MLPQ package
• Instruments
• Cell phones
Typically consuming about 1 µA in
the standby state, the SH1475 is
ideal for battery-operated systems.
27
28
nSW4
nWakeUp
MOSI
MISO
SCLK
WAKE
SWPWR
RINT
AD
THERMAL PAD
19
18
NC
E6
E1
E2
E3
VSS
XOUT
XIN
NC
36 10
19
Semtech, the Semtech logo, and Self-Power
Management are marks of Semtech
Corporation. SPI is a mark of Motorola, Inc.
Mylar is a mark of DuPont Teijin Films. All
other marks belong to their respective
owners.
Copyright ©1999-2005 Semtech Corporation
SH1475 data sheet v1.08 (2005-04-21)
1
www.semtech.com






SH1475 Datasheet, Funktion
HOST TO SH1475 COMMUNICATION
SH1475
www.DataSheet4U.com
nChipSelect
(from Host)
nTxReq
(from Host)
nWakeUp
(from SH1475)
MISO
(from Host)
D O N’ T C A R E
DON’T CARE
MOSI
(from SH1475)
FLOATING
FLOATING
SCLK
(from SH1475)
FLOATING
FLOATING
12
3
Host has data to send, SH1475 is awake or sleeping
45
1. Host asserts nTxReq, then nChipSelect (if high).
2. SH1475 asserts nWakeUp.
3. SH1475 drives the MOSI and SCLK lines and receives the packet. A complete packet of data from SH1475 may
also be transmitted at this time. Host may de-assert nTxReq.
4. SH1475 floats the MOSI and SCLK lines and de-asserts nWakeUp.
5. Host must de-assert nTxReq and may de-assert nChipSelect.
Only one packet is received for each assertion of the nTxReq line.
Copyright ©1999-2005 Semtech Corporation
SH1475 data sheet v1.08 (2005-04-21)
6
www.semtech.com

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