NUTINY-SDK-M0516 Nuvoton Technology Corporation of America, NUTINY-SDK-M0516 Datasheet - Page 161

• Manufacturer Part Number: NUTINY-SDK-M0516
• Description: BOARD EVAL NUMICRO M051 SERIES
• Manufacturer: Nuvoton Technology Corporation of America
• Series: NuMicro M051™r
• Type: MCUr

Specifications of NUTINY-SDK-M0516

• Contents: Board, Cable
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: M051™ Series, M052/M054/M058/M0516

6.5.3.2 Data transfer on the I2C-bus
6.5.3.3 START or Repeated START signal
NuMicro M051
A master-transmitter addressing a slave receiver with a 7-bit address
The transfer direction is not changed
A master reads a slave immediately after the first byte (address)
The transfer direction is changed
When the bus is free/idle, meaning no master device is engaging the bus (both SCL and SDA
lines are high), a master can initiate a transfer by sending a START signal. A START signal,
usually referred to as the S-bit, is defined as a HIGH to LOW transition on the SDA line while SCL
is HIGH. The START signal denotes the beginning of a new data transfer.
A Repeated START (Sr) is no STOP signal between two START signals. The master uses this
method to communicate with another slave or the same slave in a different transfer direction (e.g.
from writing to a device to reading from a device) without releasing the bus.
STOP signal
The master can terminate the communication by generating a STOP signal. A STOP signal,
Figure 6.5-3 Master Transmits Data to Slave
Figure 6.5-4 Master Reads Data from Slave
™
Series Technical Reference Manual
- 161 -
Publication Release Date: Sept 14, 2010
Revision V1.2