SEPTENTRIO AsteRx-m2a, Hardware Manual

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AsteRx-m2a OEM
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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 2.11
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 2.7
21 Reserved Reserved
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 2.10.
27 LOGLED O LVTTL Internal logging status indicator.
Max output current: 10 mA; output impedance: 20 Ohms See Appendix A
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 PPSout O LVTTL 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: 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 2.10
28 SD_CMD O LVTTL SD card CMD line See section 2.10
30 SD_DAT0 I/O LVTTL SD card DAT0 line See section 2.10
1 29
30 2