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Hardware Reference Manual
Wireless Connectivity
With WCN3990, it supports 802.11 b/g/n/ac mode for 2.4GHz band and with MIMO
configuration; it supports 802.11 a/n/ac mode for 5GHz band with MIMO configuration.
WCN3990 also supports Bluetooth 5.0.
With SDR660 receiver, SDA660 supports GPS location suite.
Power Management
Combination of PM660 and PM660L interfaced through two 2-line SPMI.
Dedicated clock and reset lines; plus other GPIOs as needed.
6.2.2
Memory Interface
In ERAGON660 SBC integrates with single Embedded Multi Chip Package (eMCP) has dual function
of LPDDR4X RAM and eMMC v5.1 flash. SBC supports up to 4GB of LPDDR4X RAM at max 1833
MHz clock and 64GB of eMMC flash.
The LPDDR4X has 32-bit wide bus width interfaced with SDA660 through EBI.
The eMMC v5.1 has 8-bit wide bus width interfacing with SDA660 through SDC1
interface.
6.2.3
Wi-Fi + BT Interface
The ERAGON660 board deployed Qualcomm's RF chip WCN3990B solution that integrates two different
wireless connectivity technologies into a single device, the interfaces are:
Dual-band 2.4GHz and 5GHz WLAN compliant with IEEE 802.11 a/b/g/n/ac specifications and
supports external PA for both bands
Bluetooth compliant with the BT specifications version 5.0 (BR/EDR + BLE).
All above RF signal is routed through a dual antenna (MIMO). To connect external antenna on
ERAGON660 SBC board U.FL connector is provided. In addition, support for chip antenna is given on
ERAGON660 SBC. In default the RF path is connected with chip antenna.
6.2.4
GPS Interface
The ERAGON660 board supports GPS interface, for which SDA660 is interfaced with Qualcomm's GNSS
receiver chip SRD660G. U.FL connector is provided on SBC for GPS external antenna.
6.2.5
PMIC Interface
ERAGON660 SBC module has combination of PM660 and PM660L for Power management. Both the
PMICs are interfaced to SDA660 through two-line SPMI bus.
Version 1.0
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eInfochips Confidential
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