TM
USAR SPICoder SA UR5HCSPI-SA
A Semtech Company
USAR H/PC ICs family
Zero-Power Keyboard Encoder
& Power Management IC for
Intel StrongARM-based H/PCs
product specifications
Description
Features
TM
• SPI-compatible keyboard encoder
and power management IC with
other interfaces available
• Fully compatible to the Windows
CE keyboard specification
The USAR SPICoder UR5HCSPI-
SA, a member of USAR’s H/PC ICs
family, is a keyboard encoder and
power management IC designed
specifically for Handheld PCs
®
• Works in harmony with the power
®
• Ideal for use with the Intel
management modes of Win CE
TM
StrongARM processor
• Provides special modes of
operation for H/PCs, including
programmable “wake-up” keys
• Scans an 8 x 14 matrix and
controls discrete switches and LED
indicators
TM
• Operates at patented Zero-Power
— typically consuming less than
2µA, between 3-5V
(H/PCs), Web Phones and other
systems that run Microsoft
Windows CE and utilize the Intel
StrongARM processor.
®
®
TM
• Offers overall system power
management capabilities
• Implements high-reliability two-way • Compatible with “system-on silicon”
The UR5HCSPI-SA offers several
features necessary to H/PCs,
including low power consumption,
real estate-saving size, and special
keyboard modes.
protocol
CPUs for H/PCs
• Available in small 10mm by 10mm,
44-pin QFP package
Applications
TM
The IC operates at Zero-Power
TM
• Personal Digital Assistants (PDAs)
• Wearable Computers
• Internet Appliance
• StrongARM Handheld PCs
(less than 2µA @ 3V), providing the
the host system both power
management and I/O flexibility, with
minimal battery drainage.
®
• Windows CE Platforms
• Web Phones
Pin Assignments
Special keyboard modes and built-
in power management features
TM
allow the USAR SPICoder SA to
operate in harmony with the power
management modes of Windows
®
CE , resulting in greater user
flexibility, and longer battery life.
6
40
39
1
PLCC
23
33
34
23
22
_PWR_OK
_ATN
_SS
7
C5
C4
C3
C2
C1
C0
R0
R1
R2
R3
R4
NC
PWR_OK
NC0
OSCO
OSCI
Vcc
NC
NC
_RESET
_WKU
Vx
C12
C13
GIO0
_IOTEST
Vss
NC
R7
R6
R5
R4
The IC will scan, debounce and
encode an 8 x 14 keyboard matrix.
It communicates with the Host over
the SPI channel, implementing a
high-reliability two-way protocol.
The UR5HCSPI-SA also offers
programmable features for wake-
up keys and general purpose I/O
pins. The UR5HCSPI-SA is utilized
in several Intel reference designs.
SCK
MOSI
34 MISO
XSW
12
17
QFP
SW0
C8
C9
C7
C10/WUKO
29
28
12
11
44
18
1
Copyright 1999-2000 USAR Systems, Inc.
All rights reserved.
USAR – A Semtech Company
Datasheet
DOC5-SPI-SA-DS-107
1