MCF5307CFT66B Freescale Semiconductor, MCF5307CFT66B Datasheet - Page 206
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MCF5307CFT66B
Manufacturer Part Number
MCF5307CFT66B
Description
IC MPU 32BIT 66MHZ COLDF 208FQFP
Manufacturer
Freescale Semiconductor
Series
MCF530xr
Datasheets
1.MCF5307AI66B.pdf
(484 pages)
2.MCF5307AI66B.pdf
(16 pages)
3.MCF5307AI66B.pdf
(2 pages)
Specifications of MCF5307CFT66B
Core Processor
Coldfire V3
Core Size
32-Bit
Speed
66MHz
Connectivity
EBI/EMI, I²C, UART/USART
Peripherals
DMA, POR, WDT
Number Of I /o
16
Program Memory Type
ROMless
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
208-FQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
Available stocks
Company
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Manufacturer
Quantity
Price
Company:
Part Number:
MCF5307CFT66B
Manufacturer:
FREESCAL
Quantity:
154
Company:
Part Number:
MCF5307CFT66B
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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I
Instead of signalling a STOP, the master can repeat the START signal, followed by a calling
command, (A in Figure 8-3). A repeated START occurs when a START signal is generated
without first generating a STOP signal to end 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.
8.4.1 Arbitration Procedure
If multiple devices simultaneously request the bus, the bus clock is determined by a
synchronization procedure in which the low period equals the longest clock-low period
among the devices and the high period equals the shortest. A data arbitration procedure
8-4
2
C Protocol
SCL
SDA
3. Data transfer—When successful slave addressing is achieved, the data transfer can
4. STOP signal—The master can terminate communication by generating a STOP
START
Signal
The slave whose address matches that sent by the master pulls SDA low at the ninth
clock (D) to return an acknowledge bit.
proceed (E) on a byte-by-byte basis in the direction specified by the R/W bit sent by
the calling master.
Data can be changed only while SCL is low and must be held stable while SCL is
high, as Figure 8-2 shows. SCL is pulsed once for each data bit, with the msb being
sent first. The receiving device must acknowledge each byte by pulling SDA low at
the ninth clock; therefore, a data byte transfer takes nine clock pulses.
If it does not acknowledge the master, the slave receiver must leave SDA high. The
master can then generate a STOP signal to abort the data transfer or generate a
START signal (repeated start, shown in Figure 8-3) to start a new calling sequence.
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 SDA for the
master to generate a STOP or START signal.
signal to free the bus. A STOP signal is defined as a low-to-high transition of SDA
while SCL is at logical high (F). Note that a master can generate a STOP even if the
slave has made an acknowledgment, at which point the slave must release the bus.
AD7 AD6 AD5 AD4 AD3 AD2 AD1 R/W
msb
1
2
Calling Address
3
4
Freescale Semiconductor, Inc.
5
For More Information On This Product,
6
Figure 8-3. Repeated START
7
Go to: www.freescale.com
R/W
lsb
MCF5307 User’s Manual
8
ACK
Bit
9
XX
Repeated
START
Signal
AD7 AD6 AD5 AD4 AD3 AD2 AD1 R/W
msb
A
1
2
New Calling Address
Stop
3
4
5
6
7
R/W No
lsb
8
ACK
Bit
9
STOP
Signal
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