Enhanced SDRAM bandwidth usage and memory management for TDM traffic

A system for performing interleaved access of time division multiplexed dataflows by a synchronous dynamic random access memory (SDRAM), comprising:

• a plurality of memory banks within the SDRAM;
• and
• a memory controller operable to:
• receive a data flow having virtually concatenated payloads;
• divide the received data into a first subflow and a second subflow;
• issue an active command for a row of data within a first memory bank;
• issue a sequence of consecutive write commands on said first memory bank using data from the first subflow, said first command comprising one from a group comprising a read command and a write command;
• issue a subsequent active command for a row of data within a second memory bank;
• issue a sequence of consecutive write commands on said second memory bank using data from the second subflow;
• reading data within the first and second memory banks after issuing the subsequent active command;
• and
• issue a refresh command for each row of the memory banks to prevent data within each row is from being lost.

A method for enabling interleaved reading and writing of time division multiplexed dataflows in a plurality of memory banks, comprising:

• receiving a data flow;
• dividing the received data into a first subflow and a second subflow;
• issuing an active command for a row of data within a first memory bank;
• issuing a sequence of consecutive write commands on said first memory bank using data from the first subflow;
• issuing a subsequent active command for a row of data within a second memory bank using data from the second subflow;
• issuing a sequence of consecutive write commands on said second memory bank using data from the second subflow;
• issuing a refresh command for each row of the memory banks to prevent data within each row is from being lost, wherein the refresh command is issued every nine read/write sequences, wherein a read/write sequence includes 16 read bursts and 16 write bursts;
• and
• reading data within the first and second memory banks after issuing the subsequent active command.