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Quad universal asynchronous receiver and transmitter

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PHILIPS, represented in Australia by Adilam , has released the SC16C654B/654DB quad universal asynchronous receiver and transmitter (QUART) for serial data communications. Its principal function is to convert parallel data into serial data and vice versa.

It can handle serial data rates of up to 5 Mbit/s and comes with an Intel or Motorola interface. It is pin-compatible with the ST16C654 and TL16C754 and it will power-up to be functionally equivalent to the 16C454. Programming of control registers enables the added features of the SC16C654B/654DB, including the 64-byte receive and transmit FIFOs, automatic hardware or software flow control and infrared encoding/decoding.

The selectable auto-flow control feature significantly reduces software overload and increases system efficiency while in FIFO mode by automatically controlling serial data flow using RTS output and CTS input signals.

The SC16C654B/654DB provides DMA mode data transfers through FIFO trigger levels and the TXRDY and RXRDY signals. TXRDY and RXRDY signals are not available in the HVQFN48 package.

Onboard status registers provide the user with error indications, operational status and modem interface control. System interrupts may be tailored to meet user requirements. An internal loop-back capability allows onboard diagnostics.

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