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San
Jose, Calif. - April 25, 2005
- Summit
Microelectronics has
introduced the SMR 101
programmable RESET controller, a
new device in a growing family of
flexible integrated RESET
circuits (ICs). Using Summit's
GUI-based programming technology,
system designers can customize
the SMR101 to address hundreds of
unique combinations of voltage
and timing requirements. This
unique method is a vast
improvement over conventional
"fixed" RESET ICs where the
customer must specify, procure
and inventory a unique part
number for each application
The SMR101 offers dual RESET
outputs that respond to either an
external manual pushbutton input
or an internal voltage monitor.
The "soft" RESET output will
assert under one of the following
conditions: 1) when the monitored
voltage falls below the user
programmed threshold of 2.30V to
4.50V; or 2) when the external
input is asserted and held for a
user-programmed hold time of
0.125s to 10s. The "hard" RESET
output will assert when the
external input is asserted and
held for a user programmed hold
time of 0.5s to 40s. Both RESET
outputs are held valid for a
"timeout" duration that is user
programmable from 1ms to
200ms.
The SMR101's dual RESET output
capability allows the system
designer to implement a two-level
RESET function, thereby providing
an initial "soft" RESET before
completely shutting down the
system with the "hard" RESET. In
a typical application the "soft"
RESET would apply to volatile
registers in an embedded
controller while the hard RESET
would result to a full power
cycle without the associated
power-up delays. Alternatively
the dual RESET outputs can be
linked to the system power-up
sequence and allow multiple
system start-up modes such as
"normal" and "diagnostic".
This innovative functionality of
the SMR101, combined with the
long duration (up to 40s) of the
input hold-down time, prevents
accidental RESET operation and
eliminates the need for many
consumer electronics to hide the
push-button. Consequently, this
feature improves user-experience
and application usability. To
ensure robust system operation
the manual RESET input is
"de-bounced" to suppress noise
from manual pushbutton switches.
Furthermore, an integrated time
domain glitch filter provides
power supply transient immunity,
thereby avoiding false RESET
assertions.
The SMR101's small size, low
power and high level of
programmability make it ideal for
a wide variety of applications in
consumer and customer-premises
equipment. These include set-top
boxes, GPS devices, home DSL
routers, cable modems, video
equipment, POS terminals, digital
cameras, and other handheld
computing devices.
Packaging, Pricing, and
Availability
The SMR101 operates from
+2.7V to +5.5V and consumes only
40_A. It is offered in a tiny
6-bump 1.2mm x 1.8mm Ultra CSP
package, making it more than 70%
smaller than conventional SOT-23
solutions. An 8-lead SOIC package
is also available. Both packages
are available as lead-free and
RoHS-standard compliant. The
operating temperature range for
the SMR101 is -5C to +70C.
Available now in production
quantities, the SMR101 is priced
at $0.56 each in quantities of
10,000 units for the CSP package
and at $0.76 each in quantities
of 10,000 units for the SOIC
package.
Design Software and Programmer
for Prototype Development
To speed user product
development, Summit offers
customers the SMR101EV companion
evaluation board providing a
graphic user interface (GUI)
software so designers can quickly
see the features and benefits and
design a prototype power
monitoring system with the
SMR101. This is a complete
development tool that lets
designers easily manipulate the
characteristics of their systems.
The SMR101EV design kits includes
menu-driven Microsoft
Windows® graphic user
interface (GUI) software to
automate programming tasks and
also includes all necessary
hardware to interface to the
parallel or USB port of a laptop
or PC.
Once a user completes design and
prototyping, the SMR101 kit
automatically generates a HEX
data file that can be transmitted
to Summit for review and
approval. Summit then assigns a
unique customer identification
code to the HEX file and programs
the customer's production devices
prior to final electrical test
operations. This ensures that the
device will operate properly in
the end application. The design
kit software can be downloaded
today from Summit's website
(www.summitmicro.com).
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About
Summit Microelectronics --
"Programmable analog for a
digital world".
Summit
Microelectronics supplies
semiconductors that manage and
provide power functions in
networking/communications,
storage/computing, industrial,
military, and consumer products.
Customers can very rapidly tailor
Summit's programmable analog
technology to multiple
applications by programming the
same part.
Founded in 1997, Summit is
headquartered in San Jose,
California. The Company is ISO
9001 certified.
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