User's Manual

UMTS/HSPA Module Series
UC20 User Manual
UC20_Hardware_Design Confidential / Released 15 / 84
for PPP connections.
SMS
Text and PDU mode
Point to point MO and MT
SMS cell broadcast
SMS storage: ME by default
USIM Interface
Support USIM/SIM card: 1.8V, 3.0V
Audio Features
Support one digital audio interface: PCM interface
GSM: HR/FR/EFR/AMR/AMR-WB
WCDMA: AMR/AMR-WB
Echo cancellation and noise suppression
PCM Interface
Used for audio function with external codec.
Support 8-bit A-law, μ-law and 16-bit linear data formats.
Support long frame sync and short frame sync.
Support master and slave mode, but must be the master in long frame
sync.
UART Interface
Support two UART interfaces: main UART interface and debug UART
interface.
Main UART interface:
 Seven lines on main UART interface
 Support RTS and CTS hardware flow control
 Baud rate can reach up to 921600bps, 115200bps by default
 Used for AT command, data transmission or firmware upgrade
 Support multiplexing function
Debug UART interface:
 Two lines on debug UART interface: DBG_TXD and DBG_RXD
 Can be used for GNSS NMEA sentences output
USB Interface
Compliant with USB 2.0 specification (slave only), the data transfer
rate can reach up to 480Mbps.
Used for AT command communication, data transmission, GNSS
NMEA output, software debug and firmware upgrade.
USB Driver: Windows XP, Windows Vista, Windows 7, Windows 8,
Windows CE5.0/6.0/7.0, Linux 2.6/3.0, Android 2.3/4.0/4.2.
Rx-diversity
Support UMTS Rx-diversity
GNSS Features
Gen8 of Qualcomm GNSS engine (GPS and GLONASS)
Protocol: NMEA 0183
AT Commands
Compliant with 3GPP TS 27.007, 27.005 and Quectel enhanced AT
commands.
Real Time Clock
Implemented
Network Indication
Two pins including NET_MODE and NET_STATUS to indicate
network connectivity status.