• SL869-V2S: ROM based, GPS-only
• SL869L-V2S: Switching Mode Power Supply, Added LNA and DC blocking
capacitor, Added 2nd UART port for RTCM input.
2.3.1. SL869-V2S and SL869L-V2S Features
• GPS-only
• ROM-based (Firmware cannot be updated)
• The second port is UART only (I2C is not supported)
• Locally generated AGPS (EASY - Embedded Assist System) on SL869-V2S and
SL869L-V2S is supported only on MT3337E ROM (version 2.3) after Oct. 2015.
o Earlier ROM versions did not support EASY.
• Server-generated AGPS (EPO - Extended Prediction Orbit) is supported via a host
system (e.g. a microprocessor) for the SL869-V2S and SL869L-V2S.
Please refer to the MT333x Host EPO Application Note.
2.3.1.1. ROM versions
The current SL869-V2S and SL869L-V2S have the MT3337E (enhanced) ROM with the
following changes:
Added features:
• Improved TTFF and Position
• EASY
• PPS sync with NMEA
Deleted features:
• SBAS
• Always Locate
• LOCUS
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