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CML Microcircuits
COMMUNICATION SEMICONDUCTORS
CMX909B
GMSK Packet Data Modem
D/909B/2 November 2008
Features
• GMSK Modulation/Demodulation • On-chip Packet Detection
• Rx or Tx up to 38.4kbits/sec
• Parallel Host Processor Interface
• Full and Short Data Packet Framing • Low Power 3.0V/5.0V Operation
• Mobitex Compatible including R14N Short Block Frames
• Flexible Operating and Powersave Modes
1. Brief Description
The CMX909B is a half-duplex Gaussian Minimum Shift Keyed (GMSK) BT=0.3 modem data pump with on-chip packet data handling.