SEPTENTRIO AsteRx4, Руководство по оборудованию

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AsteRx4_OEM
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Pin# Name Type Level Description Connection Tips
1 Gnd Gnd 0 Ground. All ground pins must be connected.
3 USB_D- I/O USB USB data signal negative D-. Leave unconnected if USB not used. See
also section 2.8.
5 USB_D+ I/O USB USB data signal positive D+. Leave unconnected if USB not used. See
also section 2.8.
7 Gnd Gnd 0 Ground. All ground pins must be connected.
9 Reserved Reserved for future use Leave unconnected.
11 LANLED O LVTTL LAN link and activity indicator, see Appendix A. Leave unconnected if not used.
Max output current: 8mA.
13 Reserved Reserved for future use Leave unconnected.
15 Vin P 3.0V
<Vin
<5.5V Main power supply input. Both Vin pins (pin#16 and pin#15) must be
tied together.
17 Gnd Gnd 0 Ground. All ground pins must be connected.
19 SCOM_RX1 I LVTTL Serial COM 1 receive line (inactive state is high).
Disabled when pin#69 is tied to ground. Pull up to 3.3V if not used (see warning
above).
21 SCOM_RX2 I LVTTL Serial COM 2 receive line (inactive state is high).
Disabled when pin#69 is tied to ground. Pull up to 3.3V if not used (see warning
above).
23 SCOM_RX3 I LVTTL Serial COM 3 receive line (inactive state is high) Pull up to 3.3V if not used (see warning
above).
25 SCOM_RX4 I LVTTL Serial COM 4 receive line (inactive state is high). Pull up to 3.3V if not used (see warning
above).
27 Gnd Gnd 0 Ground. All ground pins must be connected.
29 VCC_3V3
_OUT P 3.3V
3.3V power supply output (10mA max), or 0V if the
receiver is in sleep or stand-by mode. See warning at the beginning of this
section.
31 Reserved Reserved for future use Leave unconnected.
33 Gnd Gnd 0 Ground. All ground pins must be connected
35 EVENT_B I LVTTL Event B input (see Firmware User Manual for
operation instructions) Tie to ground if not used.
37 Gnd Gnd 0 Ground. All ground pins must be connected.
39 REF_O O LVTTL Output depends on the EXTREF_STAT pin level:
EXTREF_STAT left open: 10-MHz square wave output
from the internal frequency reference.
EXTREF_STAT tied to ground: REF_O is disabled. See also section 2.4.
41 Gnd Gnd 0 Ground. All ground pins must be connected.
43 REF_I I LVTTL 10-MHz square wave frequency reference input.
Input ignored when EXTREF_STAT is left open. Leave unconnected when using the
internal TCXO reference. See also section
2.4.
45 SCOM_CTS2 I LVTTL Serial COM 2 CTS line Tie to ground if not used.
47 SCOM_CTS3 I LVTTL Serial COM 3 CTS line Tie to ground if not used.
49 LOGLED O LVTTL Internal logging status indicator, see Appendix A. Leave unconnected if not used.
Max output current: 8mA.
51 TRACKLED O LVTTL Tracking status indicator, see Appendix A. Leave unconnected if not used.
Max output current: 8mA.
53 GP1 O LVTTL GP1 in setGPIOFunctionality command. Leave unconnected if not used.
See also section 2.6.
55 EXTREF
_STAT I LVTTL Sets the source of the 10-MHz frequency reference
(internal or external). Leave unconnected to use the internal
frequency reference, or tie to ground
otherwise (see also section 2.4).
Internally pulled-up.
57 Gnd Gnd 0 Ground. All ground pins must be connected.
59 Reserved Reserved for future use Leave unconnected.
61 SD_CMD O LVTTL SD card CMD line Leave unconnected, or connect to SD card
socket (see section 2.11).
63 SD_CLK O LVTTL SD card CLK line Leave unconnected, or connect to SD card
socket (see section 2.11).
65 Reserved Reserved for future use Leave unconnected.
67 Gnd Gnd 0 Ground. All ground pins must be connected.
69 TTLnRS232 I LVTTL TTL vs RS232 selection for COM1 and COM2 Leave unconnected to enable COM1&2 RX
lines on pins #19 and #21.
Tie to ground to enable COM1&2 RX lines
on pins #76 and #80.
71 Reserved Reserved for future use Leave unconnected.
73 O Ethernet Ethernet TX+ Leave unconnected if not used. See section
2.9 otherwise.
75 ETH_TX- O Ethernet Ethernet TX- Leave unconnected if not used. See section
2.9 otherwise.
77 I Ethernet Ethernet RX+ Leave unconnected if not used. See section
2.9 otherwise.
79 ETH_RX- I Ethernet Ethernet RX- Leave unconnected if not used. See section
2.9 otherwise.