NEC Electronics Develops GPS Chipset for
Mobile Applications with Three-mode Positioning System
JapanCorp: <http://www.japancorp.net/?page_num=1>
NEC Electronics Develops GPS Chipset for Mobile Applications with
Three-mode Positioning System
Tokyo, Japan, July. 04, 2003 - (JCN Newswire) - NEC Electronics
Corporation today announced that it has developed a new signal
processing device (uPD77534) and an RF/IF down converter IC (uPB1009) to
enhance Global Positioning System (GPS) functions for cellular phones
and other mobile applications.
The uPD77534 is an ARM7 TDMI-based System LSI for signal processing,
fabricated on 0.15-micron process. As a chipset solution with uPD77534,
NEC Electronics has also developed a new RF/IF down converter chip which
is connected to the signal processor device and converts the high
frequency GPS satellite signal to a low frequency signal used to
establish location.
The new chipset, uPD77534 and uPB1009, enables correspondence in three
modes: Mobile Station (MS)-assisted mode, MS-based mode, and autonomous
mode. MS-assisted mode offers high sensitivity and fast positioning
time, while it requires communication with the location servers which
incurs transmission cost. On the other hand, autonomous mode does not
require the transaction with the servers in obtaining assistant data but
needs relatively longer time for positioning. MS-based mode has the
characteristics that stay in the middle between the two. MS-assisted
mode has already been introduced in the existing chipset (uPD77533 and
µPB1007), and the two new modes are added this time allowing an optimal
solution for the positioning in each occasion.
While enhancing the performance, the new chipset has achieved a
remarkably low power consumption. The total power consumed in location
mode is below 61mA, reduced by 40% from the existing chipset. In
operating mode, the power consumption of uPD77534 and uPB1009 are 34mA
and 27mA, respectively. The mounting area will also be reduced by 40%
thanks to the smaller package size, which will greatly benefit the
mobile handset makers who intend to implement GPS function in their
products.
"These days, as mobile terminals such as cellular phone are starting to
offer GPS services, calls for small and lightweight GPS handsets are
increasing rapidly," said Tetsuro Kanai, general manager, 1st System LSI
Division, NEC Electronics Corporation. "To meet such demands, we have to
implement the functions that can minimize the amount of position
detection calculation needed at the handset side, in addition to offer
high-performance and compact devices. By introducing this chipset, we
believe we can expand the potential of mobile applications deploying GPS
function. New services such as position identification of emergency
calls, providing town map and recreation information of the location to
the phone callers, position identification of lost children and pets,
and so on will be made available."
With its first product uPD77533, the signal processor of previous
generation, NEC Electronics has been providing the solution to its
customers that mitigates processing load at the mobile terminal for the
past couple of years. The MS-based mode, incorporated in the device,
decreases the amount of calculation at the handset by utilizing the data
that the servers in the network called Serving Mobile Location Center
(SMLC) download from GPS satellites and by having the servers operate
the final calculation for positioning. However, while realizing highly
accurate positioning even inside or between buildings, this method
requires transmission cost in exchanging data between the terminal and
the server. To pursue inexpensive optimal positioning, therefore, the
new two modes are added in the new device uPD77534. In the MS-based
mode, mobile handset receives assistant data from the server but does
the final position calculation itself. In the autonomous mode, all the
calculations are done in the handset side and data from the server is
not required. By flexibly shifting the mode from one to another
according to the situation, cost-effective GPS function can be achieved
in mobile applications.
Pricing, Packaging and Availability
The uPB1009 is packaged in 44-pin Quad Flat Non Lead (QFN) package and
will be available for volume production in October this year, at the
price of 350 yen when ordered in quantities of 500,000 pieces or more.
The uPD77534 is packaged in 161-pin Tape Fine Pitch BGA (TFPBGA) and
will be priced at 1,000 yen for orders of 500,000 pieces or more. Its
mass production is planned to start in April 2004.
Main Specifications of the uPD77534F9
- 3MGPS signal processor device
- 16.368MHz clock input
- Power supply: Internal: 1.35-1.65V I/O: 2.3-3.3V
- Power dissipation: 34mA TYP. (1.5V)
- Package: 8mm square 161-pin Tape Fine Pitch Ball Grid array (TFPBGA)
Main Specifications of the uPB1009K
- Double conversion high-frequency receiver block IC
- Single chip RF/IF frequency down converter and PLL frequency
synthesizer
- Onboard pre-amp, total gain 110dB.
- 40dB Gain converter function
- Onboard 2nd IF filter
- Onboard 4bit AD converter.
- Power supply: 2.7V-3.3V
- Power dissipation: 27mA TYP (3V)
- Package: 6mm square 44-pin quad flat non lead (QFN)
About NEC Electronics Inc.
NEC Electronics worldwide specializes in semiconductor products
encompassing advanced technology solutions for the high-end computing
and broadband networking markets, system solutions for the mobile
handsets, PC peripherals, automotive and digital consumer markets, and
platform solutions for a wide range of customer applications. NEC
Electronics Corporation has 24 subsidiaries worldwide including NEC
Electronics America, Inc. (www.necelam.com) and NEC Electronics (Europe)
GmbH (www.ee.nec.de). In addition to marketing, selling and supporting
NEC Electronics products to customers in their respective regions, NEC
Electronics America and NEC Electronics Europe also operate local
manufacturing facilities in Roseville, California, and Ballivor,
Ireland, respectively. Additionally, NEC Electronics America is the
exclusive North American sales and marketing channel of NEC AM-LCD and
PDP modules. NEC Electronics Corporation is a wholly owned subsidiary of
NEC Corporation (FTSE: 6701q.l), one of the world's
leading providers of Internet, broadband network and enterprise business
solutions.For further information, please visit the NEC Electronics Inc.
home page at: www.necel.com <http://www.necel.com>
Contact
NEC Electronics Inc.
Denise Viereck Garibaldi
denise_garibaldi@el.nec.com
(408) 588-6620
_____
July. 04, 2003, 12:34 (JST)
Source: NEC Electronics Inc.
NEC Electronics Inc.
www.necel.com <http://www.necel.com>
From the Japan Corporate News Network
www.japancorp.net <http://www.japancorp.net>
Topic: New Product
Sectors: Wireless, Telematics & Software, Semiconductors, Electronic
Components
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