Serial Communication Controller

Features

• Product Features
• Designed for use with 8 and 16-bit microprocessors.
• Reliable operation with 25Mhz clock.
• On-chip crystal clock oscillator, DPLL and Baud Rate Generator.
• Two Independent full-duplex channels.
• Receiver data registers quadruply buffered.
• NRZ, NRZI, FM encoding/decoding.
• Fully synthesizable Register Transfer Level (RTL) VHDL
• Synchronous / Isosynchronous data rates
• Upto ¼ of the PCLK (2.5 Mbits/sec) maximum data rate with 10 MHz PCLK using external phase locked loop.
• Upto 625 Kbit/sec with a 10 MHz clock rate. Upto 500Kbit/sec with a 8MHz clock rate (FM encoding using DPLL).
• Upto 372.5 Kbit/sec with a 10 MHz clock rate. Upto 250 Kbit/sec with a 8 MHz clock rate (NRZI encoding using DPLL).
• Asynchronous capabilities
• 5,6,7 or 8 bits per character.
• 1,1-½ or 2 stop bits.
• Odd or Even parity.
• Times 1,16,32 or 64 clock modes.
• Spike rejection mechanism, break generation and detection and also parity overrun and framing error detection.
• Synchronous capabilities
• Internal or external synchronization.
• 5,6,7 or 8 bits per character with 1 or 2 sync characters in separate registers.
• Automatic CRC generation (CRC-16/SDLC- CRC) generation/detection
• SDLC / HDLC Capabilities
• 5,6,7 or 8 bits per character.
• Abort sequence generation and checking.
• Automatic zero insertion/deletion and detection.
• Automatic flag insertion between messages.
• Address field recognition.
• SDLC Loop-mode with EOP recognition/loop entry and exit.
• CRC-16/SDLC-CRC generation/detection.