Product specifications
20
C
RESCENT
V
ECTOR
OEM
P
IN
O
UT
The Crescent Vector OEM module uses a 34-pin (17 pins by 2 rows) header
connector for interfacing to power, communications, and other signals. You can
identify the first pin of this connector by a small triangular corner on the silk-screen
of the header connector footprint. There is also a small diamond symbol next to pin1
and also printed beside the pin is ‘P900’. Pin numbering is the conventional row-by-
row approach. When you are looking at the board so that the ‘P900’ is right side up,
pin two is beside (to the right) of the first pin. Pin three is below the first pin, and so
on.
The following table provides a pin-out description for the Crescent Vector module’s
34-pin header connector.
Table 3-3. Crescent Vector Pin-out.
Pin Signal and Description Pin Signal and Description
1
3.3 Volts Input (range: 3.2-3.4VDC)
18
Differential Lock Indicator (Active
Low) (1 mA max, active low, 3.3 VDC
– optional connection)
2
3.3 Volts Input (range: 3.2-3.4VDC)
19
DGPS Lock Indicator (Active Low) (1
mA max, active low, 3.3 VDC –
optional connection)
3
Antenna Power (0 – 15VDC)
20
ARM Boot Select (Active Low) - leave
disconnected
4
Backup power input (1.6 - 3.5 VDC, <5 µA
consumption)
21
GPIO0
5
USB+
22
Slave GPS lock indicator (Active Low)
6
USB-
23
Auxiliary GPS lock indicator (Active
Low)
7
GND
24
Heading Lock indicator (Active Low)
8
GND
25
Speed radar pulse
9
Port A TX
26
Speed radar ready signal
10
Port A RX
27
GND
11
Port B TX
28
GND
12
Port B RX
29
CLK [RESERVED, CSI USE ONLY]
13
Port D TX
30
Alarm - RTC Alarm Output
14
Port D RX
31
Port C TX
15
1 PPS ( Active High )
32
Port C RX
16
Manual Mark ( Active Low )
33
GPIO4 [PRMUX]
17
GPS Lock Indicator (Active Low) (1 mA max,
active low, 3.3 VDC – optional connection)
34
Reset (Active Low) - Input/Output
Note: Any data or I/O pins should be left unconnected if not in use.
Note: The Crescent Vector OEM differs from its predecessor, the Vector OEM,
in that it does not have power supply or communication translation; this must
be accomplished by a carrier board.