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FIBOCOM NL668-LA Series Hardware Guide
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UART x 2, PCM, I2C, SGMII, SPI, SDIO, GPIOs
ADC x 2
Software
Protocol Stack
Embedded TCP/IP and UDP/IP protocol stack
AT Command
3GPP TS 27.007 and 27.005, and proprietary FIBOCOM AT
Firmware update
USB (UART does not support DOWNLOAD) and DFOTA upgrade
2
Voice service
3
VoLTE, HR, FR, EFR, AMR, DTMF, Caller ID, Call Transfer, Call Hold, Call
Waiting and Multi-Talk, etc.
SMS
point-to-point MO, MT; cell broadcast; support Text and PDU modes
Note:
1. When the temperature is beyond the normal operating temperature range (-30 °C to +
75 °C), the RF performance of the module may slightly exceed the 3GPP specification.
2. Models with Memory configured as 1Gbit Flash + 1Gbit RAM are optional and available in
two versions. Data version supports DFOTA upgrade, voice version does not support
DFOTA upgrade.
3. The data version does not support voice services, but the voice version supports voice
services.
2.3 Functional Diagram
Functional diagram shows the main hardware features of the NL668-LA series module, including
baseband and RF features.
Baseband includes:
PMIC
MCP
USB, (U)SIM, PCM, I2C, SPI, UART, SGMII, SDIO, GPIOs
WCDMA /LTE FDD controller
RF includes:
RF Transceiver
RF PA
RF filter
Antenna