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SKYTRAQ PDF Datasheet - SkyTraq

Part Number SKYTRAQ
Description 65-Channel Low Power GPS Receiver
Manufacturers SkyTraq 
Logo SkyTraq Logo 
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SKYTRAQ datasheet, circuit
Data Sheet
SKYTRAQ
VENUS634FLPx 65 Channel Low Power GPS Receiver --- Flash
FEATURES
z GPS receiver in 10mm x 10mm x 1.1mm size
z Tests 8 million time-frequency hypothesis per sec
z Open sky cold start 29 second
z Signal detection better than -161dBm
z Accuracy 2.5m CEP
z ~28mA in tracking and navigation mode
z Multipath detection and suppression
z Data logging with external SPI serial Flash
z Supports active or passive antenna
z 1 SPI interface and 7 GPIO lines
z Flash-based, firmware customizable
z LGA44 package with 0.8 pitch
z Pb free RoHS compliant
The Venus634FLPx is a module-in-a-chip design targeting
mobile consumer and cellular handset applications. It
offers very low current consumption, high sensitivity, and
best in class signal acquisition and time-to-first-fix
performance.
The Venus634FLPx contains all the necessary
components of a complete GPS receiver module, includes
GPS RF front-end, GPS baseband signal processor,
0.5ppm TCXO, 32.768kHz RTC crystal, RTC LDO
regulator, and passive components. It requires very low
external component count and takes up only 100mm2
PCB footprint.
Dedicated massive-correlator signal parameter search
engine within the baseband enables rapid search of all the
available satellites and acquisition of very weak signal. An
advanced track engine allows weak signal tracking and
positioning in harsh environments such as urban canyons
and under deep foliage.
Programmable flash-based memory makes it ideal for
applications requiring customized firmware.
Figure-1 GPS Receiver based on Venus634FLPx
SkyTraq Technology, Inc.
empower mobility, without uncertainty
1
www.skytraq.com.tw

1 page
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SKYTRAQ pdf, schematic
TECHNICAL SPECIFICATIONS
Receiver Type
Accuracy
Open Sky TTFF
Reacquisition
Sensitivity
Update Rate
Dynamics
Operational Limits
Datum
Interface
Baud Rate
Protocol
Main Supply Voltage
Backup Voltage
Current Consumption
Operating Temperature
Storage Temperature
Package
L1 Frequency
GPS C/A code
SBAS Capable
51 Channel Acquisitions
14 Channel Tracking
Position
Velocity
Timing
2.5m CEP
0.1m/sec
300ns
Hot start 1 second
Cold start 29 seconds average
< 1s
Tracking -161dBm
1Hz standard
4G
Altitude < 18,000m*1 or
Velocity < 515m/s*1
Default WGS-84
UART LVTTL level
4800 / 9600 / 38400 / 115200 software configurable (9600 as default)
NMEA-0183 V3.01, GGA, GLL, GSA, GSV, RMC, VTG (default GGA, GSA, GSV, RMC, VTG)
SkyTraq Binary
2.8V ~ 3.6V
1.5V ~ 6V
~28mA tracking
-40 ~ +85 deg-C
-40 ~ +125 deg-C
LGA44 10mm x 10mm x 1.1mm, 0.8mm pitch
*1: COCOM limit, either may be exceeded but not both
SkyTraq Technology, Inc.
empower mobility, without uncertainty
2
www.skytraq.com.tw

2 Page
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SKYTRAQ equivalent

5 Page
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SKYTRAQ diode, scr
APPLICATION CIRCUIT INTERFACE SIGNALS
GND_A:
RF ground
LED_GPIO0:
Signal to indicate GPS position status, or for GPIO (3.3V LVTTL). Active LOW.
GPIO24:
GPIO pin, also serving as Search Engine Mode Selection upon power-up
1: Low power acquisition mode
0: Enhanced acquisition mode
PIO12, GPIO20:
GPIO pin
GND:
Digital ground
P1PPS:
1 pulse per second time-mark (3.3V LVTTL)
RSTN:
Active low reset input
PIO14, GPIO1, GPIO2:
GPIO pin
VCC33:
3.3V power input
FRXD0:
UART input (3.3V LVTTL)
FTXD0:
UART output (3.3V LVTTL)
VBAT:
Battery-backed RTC and SRAM supply input, must not be unconnected.
SPICSN_PIO6:
SPI chip select output or GPIO pin
MISO_PIO8:
SPI data input or GPIO pin
SPICLK_PIOO7:
SPI clock or general purpose output pin
MOSI_PIO9:
SPI data output or GPIO pin
SkyTraq Technology, Inc.
empower mobility, without uncertainty
7
www.skytraq.com.tw

9 Page





Information Total 18 Pages
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