MCF51CN128CLH Freescale Semiconductor, MCF51CN128CLH Datasheet - Page 21

• Manufacturer Part Number: MCF51CN128CLH
• Description: IC MCU 32BIT 128K FLASH 64-LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF51CNr

Specifications of MCF51CN128CLH

• Core Processor: Coldfire V1
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: Ethernet, I²C, SCI, SPI
• Peripherals: LVD, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 24K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 12x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-LQFP
• Processor Series: MCF51CN
• Core: ColdFire V1
• Data Bus Width: 32 bit
• Data Ram Size: 24 KB
• Interface Type: I2C, SPI, SCI
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 54
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JLINK-CF-BDM26, EWCF
• Development Tools By Supplier: TWR-MCF51CN-KIT, TWR-SER, TWR-ELEV, TOWER
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 12 Channel
• Package: 64LQFP
• Device Core: ColdFire
• Family Name: MCF51CN
• Maximum Speed: 50.33 MHz
• Number Of Timers: 2
• For Use With: TWR-MCF51CN - KIT TOWER BOARDTWR-MCF51CN-KIT - KIT TOWER BOARD/SERIAL/ELEVATOR
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The serial bridge uses a debugging service that uses two FreeRTOS services called
configUSE_TRACE_FACILITY and INCLUDE_vTaskDelete. The first one is used to show tasks’ usage
at run time. The second is used to delete a task at run time. Both can be disabled if a final release doesn’t
need them, then decrease the memory footprint.
4.1.2
This active open-source software handles all the Ethernet transactions and enables the TCP/IP suite.
This TCP/IP stack is also highly coupled for this serial bridge and limited RAM memory on this MCU
(24 KB). LwIP takes 12.15 KB from RAM memory at compile time to start all the TCP/IP services needed
by the serial bridge. At run time, it takes necessary RAM memory available from the HEAP. It allocates
and releases some buffers at run time. It uses a very limited set of network buffers to send and receive
information from application higher layers.
Some of LwIP features are:
The implementation of a layered software architecture allows to easily migrate this application software
to other Freescale MCUs like MCF5225x, MCF5223x, or even higher processors if more resources are
needed like FlexCAN, Encryption, or USB. The following sections give more detail.
Freescale Semiconductor
•
•
•
•
•
•
•
•
•
IP
ICMP
UDP
TCP
Specialized raw API (used for this serial bridge)
Optional socket API
DHCP
PPP
ARP
LwIP v1.3.0
Memory footprint doesn’t consider RAM space taken by the kernel or the
tasks at run time, only at compile time.
Serial-to-Ethernet Bridge Using MCF51CN Family and FreeRTOS, Rev. 0
Table 4. FreeRTOS Memory Footprint for the Serial Bridge
list.c
queue.c
tasks.c
heap_3.c
port.c
portasm.s
FreeRTOS Files
Total
NOTE
5690 B
ROM
1728
3134
212
300
248
68
344 B
RAM
340
0
0
0
4
0
Serial-to-Ethernet Software
21