MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 573

• Manufacturer Part Number: MOD5234-100IR
• Description: MOD5234 10/100 ETHERNET MODULE
• Manufacturer: NetBurner Inc
• Type: Controllers & Processorsr

Specifications of MOD5234-100IR

• Interface: I²C, SPI, UART
• Voltage - Supply: 2.5V
• Mounting Type: Surface Mount
• Package / Case: Module
• Product: Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Format: -
• Baud Rates: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q4483564

If the master receiver does not acknowledge the slave transmitter after a byte transmission, it
means end-of-data to the slave. The slave releases I2C_SDA for the master to generate a STOP or
START signal
27.4.5 STOP Signal
The master can terminate communication by generating a STOP signal to free the bus. A STOP
signal is defined as a low-to-high transition of I2C_SDA while I2C_SCL is at logical high (F). The
master can generate a STOP even if the slave has generated an acknowledgment at which point the
slave must release the bus. The master may also generate a START signal following a calling
address, without first generating a STOP signal. Refer to
27.4.6 Repeated START
A repeated START signal is a START signal generated without first generating a STOP signal to
terminate the communication. The master uses a repeated START to communicate with another
slave or with the same slave in a different mode (transmit/receive mode) without releasing the bus.
Various combinations of read/write formats are then possible:
Freescale Semiconductor
I2C_SDA
I2C_SCL
I2C_SDA by Transmitter
START
Signal
I2C_SDA by Receiver
msb
AD7 AD6 AD5 AD4 AD3 AD2 AD1 R/W
(Figure
1
2
I2C_SCL
Calling Address
3
27-4).
Figure 27-4. Acknowledgement by Receiver
4
START Signal
5
Figure 27-5. Repeated START
6
MCF5235 Reference Manual, Rev. 2
lsb
7
Bit7
1
R/W
8
Bit6
ACK
2
Bit
9
Bit5
XX
3
Repeated
START
Signal
Bit4 Bit3 Bit2 Bit1
msb
4
AD7 AD6 AD5 AD4 AD3 AD2 AD1 R/W
A
1
5
Section 27.4.6, “Repeated START.”
2
New Calling Address
Stop
6
3
7
4
R/W
Bit0
5
8
6
9
lsb
7
I
2
R/W No
C System Configuration
8
ACK
Bit
9
STOP
Signal
27-5