Description

The SC28L92A1B is a UART (Universal Asynchronous Receiver Transmitter) electronic component, which is a pin and function replacement for the SCC2692 and SC26C92. It operates at 3.3 or 5 volts supply with added features and deeper FIFOs. Its configuration on power-up is that of the SC26C92. Its differences from the 2692 include a 16 character receiver, 16 character transmit FIFOs, watch dog timer for each receiver, mode register 0 is added, extended baud rate, overall faster speeds, and programmable receiver and transmitter interrupts. (Neither the SC26C92 nor the SCC2692 is being discontinued.)

Specifications and features

• Member of IMPACT family: 3.3 to 5.0 volt, -40°C to +85°C and 68K for 80xxx bus interface for all devices.
• Dual full-duplex independent asynchronous receiver/transmitters.
• 16 character FIFOs for each receiver and transmitter.
• Pin programming selects 68K or 80xxx bus interface.
• Programmable data format:
  • 5 to 8 data bits plus parity.
  • Odd, even, no parity or force parity.
  • -1, 1.5, or 2 stop bits programmable in 1/16-bit increments.
• 16-bit programmable Counter/Timer.
• Programmable baud rate for each receiver and transmitter selectable from:
  • 28 fixed rates: 50 to 230.4k baud.
  • Other baud rates to MHz at 16X.
  • Programmable user-defined rates derived from a programmable counter/timer.
  • External 1X or 16X clock.
• Parity, framing, and overrun error detection.
• False start bit detection.
• Line break detection and generation.
• Programmable channel mode:
  • Normal (full-duplex).
  • Automatic echo.
  • Local loop back.
  • Remote loop back.
  • Multi-drop mode (also called ‘wake-up’ or ‘9-bit’).
• Multi-function 7-bit input port (includes IACKN):
  • Can serve as clock or control inputs.
  • Change of state detection on four inputs.
  • Inputs have typically >100k pull-up resistors.
  • Change of state detectors for modem control.
• Multi-function 8-bit output port:
  • Individual bit set/reset capability.
  • Outputs can be programmed to be status/interrupt signals.
  • FIFO status for DMA interface.
• Versatile interrupt system:
  • Single interrupt output with eight maskable interrupting conditions.
  • Output port can be configured to provide a total of up to six separate interrupt outputs that may be wire ORed.
  • Each FIFO can be programmed for four different interrupt levels.
  • Watch dog timer for each receiver.
• Maximum data transfer rates: 1X – 1Mb/sec, 16X – 1Mb/sec.
• Automatic wake-up mode for multi-drop applications.
• Start-end break interrupt/status.
• Detects break which originates in the middle of a character.
• On-chip crystal oscillator.
• Power down mode.
• Receiver time-out mode.
• Single +3.3V or +5V power supply.
• Powers up to emulate SC26C92.

Application Scenarios

The SC28L92A1B is ideal for use in various electronic devices requiring a UART component, such as computers, consumer electronics devices, communications devices, and more.

Comparison

• Pin and function replacement for popular models.
• Operates at 3.3 or 5 volts supply.
• Added features and deeper FIFOs, including watch dog timer for each receiver, mode register 0, extended baud rate, overall faster speeds, and programmable receiver and transmitter interrupts.
• Dual full-duplex independent asynchronous receiver/transmitters.
• Various programmable settings for data format, channel mode, and more.
• Multi-function input/output ports.
• Versatile interrupt system with watch dog timer for each receiver.
• Maximum data transfer rates up to 1 Mb/sec.
• Automatic wake-up mode for multi-drop applications.
• On-chip crystal oscillator.
• Single +3.3V or +5V power supply.

• None found.