GPS-41SMD Datasheet, PDF (4/11 Pages) rfsolutions.ltd – Fast-Acquisition Enhanced-Sensitivity 12-Channel SMD GPS Receiver Module

Embedded GPS Module
GPS-41SMDR
GPS-41SMDF
PINOUT DESCRIPTION
Pin Number Signal Name I/O Description
1
NC
- No connection
2
NC
- No connection
3
TXD0
O 3.3V LVTTL async serial output, to output NMEA message
4
RXD0
I 3.3V LVTTL async serial input, to input binary commands
5
NC
- No connection
6
DVCC
- Regulated 3.3V supply input for digital section
7
GND
- Ground
8
NC
- No connection
9
NC
- No connection
10
RESETN
I Manual reset input, active LOW. Leave open if not used.
11
VCC BAT
- 2.0V ~ 3.9V supply voltage to sustain RTC and SRAM data. Connect to
GND if not used; will cold start every time.
12
NC
- No conection
13
RF GND
- RF ground
14
RF GND
- RF ground
15
RF GND
- RF ground
16
RF IN
I GPS signal input. 50Ω impedance.
17
RF GND
- RF ground
18
VCC RF
- Regulated 3.3V supply voltage for the RF section
19
VCC ANT
- Power input for active antenna. Leave open if not used.
20
NC
- No connection
21
NC
- No connection
22
NC
- No connection
23
NC
- No connection
24
BAUD SEL0 I Baud rate selection 0
25
BAUD SEL1 I Baud rate selection 1
BAUDSEL[1:0] 00 4800 baud
01 9600 baud
10 19200 baud
11 38400 baud
26
GPIO11
(LED)
O 3.3V GPIO, default used for GPS status indication
27
NC
- No connection
28
P1PPS
O 1 pulse per second time mark
1PPS Output
The GPS receiver is in navigation mode upon power-up, with 1PPS output free running. After 3 minutes of valid
position fix and remaining under static-mode, the receiver changes to timing-mode, with 1PPS output signal
synchronized to the UTC second. The receiver will change to navigation-mode, with 1PPS output free running,
if the receiver is in motion. The 1PPS output will become synchronized to the UTC second again after the
receiver had remained in static mode for 3 minutes.
DS-41SMD-2 June ’06
©2006 RF Solutions Ltd, www.rfsolutions.co.uk
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