WM_PRJ_Q2501_PTS_002
- 001
March
2004
confidential ©
Page:
48 / 79
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3.4.2 GPS serial links
3.4.2.1
Main GPS Serial Link implementation (GPS_UART2)
This 2-wire serial interface is a 3 V interface.
In default configuration, this interface allows GPS NMEA frame
communications.
Pin Description
Signal
Pin #
I/O
I/O type
Description
GPS_RXD2 1 O Open
Collector
with 10 k
Ω
internal
pull-up
CT104- Receive Serial Data
GPS_TXD2 2 I CMOS
2.8 V
CT103- Transmit Serial Data
C1+
C1-
C2+
C2-
T1IN
T2IN
R1OUT
R2OUT
V+
V-
T1OUT
T2OUT
R1IN
R2IN
GND
9
2
3
4
11
1
C203
470 nF
C0805
15
9
14
13
S_TXD2
7
S_RXD2
1
2
3
4
5
6
7
8
9
GND
NC
1
12
5
10
2
1
WISMO
Q2501
GND
C202
470 nF
C0805
GPS_TXD2
GPS_RXD2
3232
U200
SSOP16
2
1
2
1
C204
100 nF
C200
470 nF
C0805
C201
470 nF
C0805
2
6
16
3V3
VCC
GND
J200
SUB-D9F-C
Figure 30: Example of RS232 level shifter implementation for GPS UART2
Summary of Contents for WISMO Quik Q2501
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