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Zilog’s ZDU0110RFX Digital Universal Asynchronous Receiver/Transmitter (UART) is a single-chip CMOS communications device which provides full duplex asynchronous communications with a 128 byte FIFO buffer, of which 64 bytes each are allocated to Receive and Transmit operations.

This device also contains a 4 kbit EEPROM and General-Purpose Input and Output (GPIO) with programmable interrupt capability. Zilog’s Digital UART has an internal 8 MHz oscillator, which eliminates the requirement for an external crystal oscilla-tor. This Digital UART is controlled by the simple I2C protocol (2-Wire Interface), allowing up to eight devices in the same I2C network. Although this device is fully programmable through the exposed commands, it is preconfigured to operate at a 57,600 baud rate; therefore, configuration is not required to access the UART or the EEPROM.

This Digital UART provides separate programmable interrupts and interrupt lines for UART notification and GPIO notifications, so the controlling device does not have to poll the device for data.

ZDU0110RFX Features
  • Single power supply from 1.8 V to 5.5 V
  • No external crystal needed
  • Minimal pin count for space saving Interrupt lines for UARTs and GPIOs for notification
  • Control via I2C standard protocol, up to 400 K
  • Default UART setting: 57600 baud, no flow control, no parity, 8 bits
  • 1 industry standard full duplex individual UART channel
  • 4 KB built-in I2C EEPROM
  • 3 GPIO pins
  • 16 pin TSSOP package
Digital UART Block Diagram

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