SEPTENTRIO AsteRx4, Hardware Manual

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AsteRx4_OEM
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Pin# Name Type Level Description Connection Tips
2 Gnd Gnd 0 Ground. All ground pins must be connected.
4 USB_Vbus P 4.35V
≤V
high
≤
5.25V
USB Power. Cannot be used to power the receiver. Leave unconnected if USB not used.
6 Gnd Gnd 0 Ground. All ground pins must be connected.
8 nPWR_
TOGGLE I LVTTL Power toggling input, active negative. Applying a
negative pulse to this pin orders the receiver to enter
stand-by mode if it was operating, and to start
operation if it was in stand-by mode (see section 2.10
of this document). Leave unconnected if not used (there is an
internal pull-up). For proper operation, the
duration of the negative pulse must be at
least 200ms and no longer than 5s.
10 nRST_IN I LVTTL Reset input, active negative. Receiver resets when
driven low for at least 1ms. The net effect is similar to
shortly disconnecting the power supply. Leave unconnected if not used.
12 Reserved Reserved for future use Leave unconnected.
14 Vantenna P 3.15V
<Vant<
12V Antenna supply, max current per antenna 200mA.
The voltage provided on this pin is transferred to the
central conductor of the antenna MMCX connectors.
16 Vin P 3.0V
<Vin<
5.5V Main power supply input Both Vin pins (pin#16 and pin#15) must be
tied together.
18 Gnd Gnd 0 Ground. All ground pins must be connected.
20 SCOM_TX1 O LVTTL Serial COM 1 transmit line (inactive state is high) Leave unconnected if not used.
22 SCOM_TX2 O LVTTL Serial COM 2 transmit line (inactive state is high) Leave unconnected if not used.
24 SCOM_TX3 O LVTTL Serial COM 3 transmit line (inactive state is high) Leave unconnected if not used.
26 SCOM_TX4 O LVTTL Serial COM 4 transmit line (inactive state is high) Leave unconnected if not used.
28 Gnd Gnd 0 Ground. All ground pins must be connected.
30 Reserved Reserved for future use Leave unconnected.
32 Gnd Gnd 0 Ground. All ground pins must be connected.
34 EVENT_A I LVTTL Event A input (see Firmware User Manual for
operation instructions) Tie to ground if not used.
36 Gnd Gnd 0 Ground. All ground pins must be connected.
38 PPSout O LVTTL PPS output. See section 2.5. Leave unconnected if not used.
40 Gnd Gnd 0 Ground. All ground pins must be connected.
42 SSNIn1 I LVTTL Proprietary input Tie to ground.
44 Button I LVTTL Input can be connected to a push button, used to
enable and disable internal SBF and NMEA logging.
High to low transitions are detected as “button
pressed” events.
Debouncing must be done externally (no
debouncing circuit on board). External pull
up to 3.3V is necessary. Pull up to 3.3V if
not used (see warning above).
46 SCOM_RTS2 O LVTTL Serial COM 2 RTS line Leave unconnected if not used.
48 SCOM_RTS3 O LVTTL Serial COM 3 RTS line Leave unconnected if not used.
50 GPLED O LVTTL General-purpose status indicator, see Appendix A. Leave unconnected if not used.
Max output current: 8mA.
52 GP3 O LVTTL GP3 in setGPIOFunctionality command. Leave unconnected if not used.
See also section 2.6.
54 GP2 O LVTTL GP2 in setGPIOFunctionality command. Leave unconnected if not used.
See also section 2.6.
56 PVTLED O LVTTL PVT status indicator, see Appendix A. Leave unconnected if not used.
Max output current: 8mA.
58 Gnd Gnd 0 Ground. All ground pins must be connected.
60 Reserved Reserved for future use Leave unconnected.
62 SD_DAT0 I/O LVTTL SD card DAT0 line Leave unconnected, or connect to SD card
socket (see section 2.11).
64 Reserved Reserved for future use Leave unconnected.
66 Reserved Reserved for future use Leave unconnected.
68 Gnd Gnd 0 Ground. All ground pins must be connected.
70 Reserved Reserved for future use Leave unconnected.
72 ETH_BIAS P Ethernet Bias pin for centre tap of Ethernet transformer Leave unconnected if not used. See section
2.9 otherwise.
74 RS232_TX1 O RS232 Serial COM 1 transmit line (RS232 level) Leave unconnected if not used.
76 RS232_RX1 I RS232 Serial COM 1 receive line (RS232 level) Leave unconnected if not used. This pin is
active only if pin#69 is tied to ground.
78 RS232_TX2 O RS232 Serial COM 2 transmit line (RS232 level) Leave unconnected if not used.
80 RS232_RX2 I RS232 Serial COM 2 receive line (RS232 level) Leave unconnected if not used. This pin is
active only if pin#69 is tied to ground.