11
11
AsteRx-m3 OEM
11
2.5.1
30-pin Connector
Connector type: Hirose 30 pins DF40HC (3.5)-30DS-0.4V(51)
Mating connector: Hirose DF40C-30DP-0.4V(51)
See the pin numbering convention in the above picture.
Pin#
Name
Type
Level
Description
Comment
1
Vin
P
3.3V
+/-5%
Main power supply input
Both Vin pins (pin#1 and pin#2) must
be tied together.
3
GND
Gnd
0
Ground.
5
USB_D+
I/O
USB
USB data signal positive D+.
7
USB_Vbus
Ctrl
4.40V
≤V≤
5.25V
USB VBUS.
This pin cannot be used to power the receiver!
Mandatory if USB is used.
See section 2.12
9
TX1
O
LVTTL
Serial COM 1 transmit line (inactive state is high)
11
GND
Gnd
0
Ground.
13
TX2
O
LVTTL
Serial COM 2 transmit line (inactive state is high)
15
TX3
O
LVTTL
Serial COM 3 transmit line (inactive state is high)
17
GND
Gnd
0
Ground.
19
EventA
I, PD
LVTTL
Event A input.
See section 2.8
21
PPS2
O
LVTTL
Second PPS output. Output impedance: 50 ohms. Output current:
24 mA. Polarity and rate user selectable independently of PPS1 on
pin#12. During start up, this pin is floating, See Reference Guide for
operating instructions. Pulse duration controllable with the
setPPS2Parameters
command (default: 5ms).
External pull up/down can be used to
impose level during start up.
23
GND
Gnd
0
Ground.
25
Button
I, K
LVTTL
Input can be connected to a push button used to control SD card
logging. Low state is interpreted as “button pressed”.
Debouncing must be done externally
(no debouncing circuit on board).
See also section 2.11.
27
LOGLED
O
LVTTL
Internal logging status indicator.
Max output current: 10 mA; output impedance: 20 Ohms
29
GND
Gnd
0
Ground.
Pin#
Name
Type
Level
Description
Comment
2
Vin
P
3.3V
+/-5%
Main power supply input
Both Vin pins (pin#1 and pin#2) must be
tied together.
4
GND
Gnd
0
Ground.
6
USB_D-
I/O
USB
USB data signal negative D-.
8
nRST
Ctrl,PU
LVTTL
Reset input, active negative. Receiver resets when driven low.
10
RX1
I, K
LVTTL
Serial COM 1 receive line (inactive state is high).
12
PPS1
O,PD
LVTTL
First PPS output. Output impedance: 50 ohms. Output current: 24
mA. Polarity and rate user selectable. During start up, this pin is
pulled low with a 100-kOhm resistor.
See Reference Guide for operating instructions. Pulse duration
controllable with the
setPPSParameters
command (default: 5ms).
14
RX2
I, K
LVTTL
Serial COM 2 receive line (inactive state is high).
16
RX3
I, K
LVTTL
Serial COM 3 receive line (inactive state is high).
18
VANT
P
3<
VANT
< 5.5V
Antenna supply.
See section 2.4.1
20
nPDN
Ctrl,PU
LVTTL
Receiver is put in standby mode (low power mode) when driven low.
Normal operation resumes when the pin level is high.
22
GPLED
O
LVTTL
General purpose LED.
Max output current: 10 mA; output impedance: 20 Ohms
See Appendix A
24
Reserved
26
SD_CLK
O
LVTTL
SD card CLK line
See section 2.11
28
SD_CMD
O
LVTTL
SD card CMD line
See section 2.11
30
SD_DAT0
I/O
LVTTL
SD card DAT0 line
See section 2.11
1
29
30
2
