Rainbow Electronics NUC140 - Manual (Page 39)

NUC140 Series DATA SHEET
Publication Release Date: May 31, 2010
- 39 - Revision V1.02
5.6.2 Features
The I2C bus uses two wires (SDA and SCL) to transfer information between devices connected to the
bus. The main features of the bus are:
y Master/Slave up to 1Mbit/s
y Bidirectional data transfer between masters and slaves
y Multi-master bus (no central master)
y Arbitration between simultaneously transmitting masters without corruption of serial data on the
bus
y Serial clock synchronization allows devices with different bit rates to communicate vian one serial
bus
y Serial clock synchronization can be used as a handshake mechanism to suspend and resume
serial transfer
y Built-in a 14-bit time-out counter will request the I2C interrupt if the I2C bus hangs up and timer-
out counter overflows.
y External pull-up are needed for high output
y Programmable clocks allow versatile rate control
y Supports 7-bit addressing mode
y I2C-bus controllers support multiple address recognition ( Four slave address with mask option)