General description

The SC18IM700 is designed to serve as an interface between the standard UART port of a microcontroller or microprocessor and the serial I2C-bus; this allows the microcontroller or microprocessor to communicate directly with other I2C-bus devices. The SC18IM700 can operate as an I2C-bus master. The SC18IM700 controls all the I2C-bus specific sequences, protocol, arbitration and timing. The host communicates with SC18IM700 with ASCII messages protocol; this makes the control sequences from the host to the SC18IM700 become very simple.

Features

■ UART host interface

■ I2C-bus controller

■ Eight programmable I/O pins

■ High-speed UART: baud rate up to 460.8 kbit/s

■ High-speed I2C-bus: 400 kbit/s

■ 16-byte TXFIFO

■ 16-byte RXFIFO

■ Programmable baud rate generator

■ 2.3 V and 3.6 V operation

■ Sleep mode (power-down)

■ UART message format resembles I2C-bus transaction format

■ I2C-bus master functions

■ Multi-master capability

■ 5 V tolerance on the input pins

■ 8 N 1 UART format (8 data bits, no parity bit, 1 stop bit)

■ Available in very small TSSOP16 package

Applications

■ Enable I2C-bus master support in a system

■ I2C-bus instrumentation and control

■ Industrial control

■ Medical equipment

■ Cellular telephones

■ Handheld computers