NuMicro® NUC029LEE/NUC029SEE
32-bit Arm
®
Cortex
®
-M0 Microcontroller
Aug, 2018
Page
389
of
497
Rev 1.00
N
U
MICRO
®
N
UC02
9L
E
E
/N
UC029
S
E
E
T
E
CHN
ICA
L R
E
F
E
R
E
NC
E
M
A
NU
A
L
6.14 I
2
C Serial Interface Controller (I
2
C)
6.14.1 Overview
I
2
C is a two-wire, bi-directional serial bus that provides a simple and efficient method of data exchange
between devices. The I
2
C standard is a true multi-master bus including collision detection and
arbitration that prevents data corruption if two or more masters attempt to control the bus
simultaneously.
6.14.2 Features
The I
2
C bus uses two wires (I2Cn_SDA and I2Cn_SCL) to transfer information between devices
connected to the bus. The main features of the I
2
C bus include:
Supports up to two I
2
C serial interface controller
Master/Slave mode
Bidirectional data transfer between masters and slaves
Multi-master bus (no central master)
Arbitration between simultaneously transmitting masters without corruption of serial data on
the bus
Serial clock synchronization allow devices with different bit rates to communicate via one
serial bus
Built-in a 14-bit time-out counter requesting the I
2
C interrupt if the I
2
C bus hangs up and
timer-out counter overflows.
Programmable clocks allow for versatile rate control
Supports 7-bit addressing mode
Supports multiple address recognition ( four slave address with mask option)
Supports Power-down wake-up function