RGPSM202 Semtech, RGPSM202 Datasheet - Page 8

• Manufacturer Part Number: RGPSM202
• Description: MODULE SLIM GPS RECEIVER LP
• Manufacturer: Semtech

Specifications of RGPSM202

• Frequency: 1.575GHz
• Sensitivity: -143dBm
• Modulation Or Protocol: GPS
• Applications: Automotive, Laptop, PDA
• Current - Receiving: 25mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 3 V ~ 3.65 V
• Package / Case: Module
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Operating Temperature: -
• Memory Size: -
• Data Rate - Maximum: -

5.2
The receiver has 3 main operating modes, as summarized in the table below
Notes on TTFF / start-up condition:
5.2.1
The simplest and easiest way to operate the RGPSM202 is the stand-alone configuration described below. In this case,
the GPS receiver is simply controlled by its main power supply. It only sends NMEA strings through its TXDA line. The
data interface should be connected as follows:
© Semtech 2005
Mode
Active Mode
Low Power Mode
Power Down Mode
•
OPERATING MODES
Pin
1, 2
3
4
5
6, 9, 17, 20, 21
When switching from any state to Active mode, the start up condition will be
Operating the GPS receiver in a basic “stand-alone” configuration
o
o
o
Hot start if Almanac is valid, Ephemeris is valid (less than 4 hours old), approximate position is known
and RTC is valid
Warm start if Almanac is valid, Ephemeris is not valid, approximate position is known and RTC is valid
Cold start otherwise
Description
Receiver is running, doing acquisition,
tracking, position fixes
GPS receiver functions are turned OFF,
MCU clock is running
GPS receiver functions are turned OFF,
MCU clock is stopped, RTC is running
on the Back-up supply
Name
TDI, TCK,
TDO
TMS
RXDA
DGND
Figure 5 - Switching between operating modes
Table 3 – Operating Modes
To digital ground
Connection
To VCC
N.C.
To VCC or N.C
To VCC or N.C
Power down
Active
VCC switched Off
8
“LP” NMEA
com
VCC pin
Powered
Powered
No power
“LP” NMEA
Low Power
com
VCC switched On
Low
through “LP”
NMEA
command
SlimGPS™ Receiver
RGPSM202
Current cons.
25 mA
2.2 mA
2 uA
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