MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 53

• 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

processing. For all data cache configurations, the memory operates in write-through mode and all
operand writes generate an external bus cycle.
1.3.6.2
The SRAM module provides a general-purpose 64-Kbyte memory block that the ColdFire core
can access in a single cycle. The location of the memory block can be set to any 64-Kbyte
boundary within the 4-Gbyte address space. The memory is ideal for storing critical code or data
structures, for use as the system stack, or for storing FEC data buffers. Because the SRAM module
is physically connected to the processor's high-speed local bus, it can quickly service core-initiated
accesses or memory-referencing commands from the debug module.
The SRAM module is also accessible by the DMA and FEC non-core bus masters. The dual-ported
nature of the SRAM makes it ideal for implementing applications with double-buffer schemes,
where the processor and a DMA device operate in alternate regions of the SRAM to maximize
system performance. As an example, system performance can be increased significantly if
Ethernet packets are moved from the FEC into the SRAM (rather than external memory) prior to
any processing.
1.3.7
The MCF5235’s integrated Fast Ethernet Controller (FEC) performs the full set of IEEE
802.3/Ethernet CSMA/CD media access control and channel interface functions. The FEC
supports connection and functionality for the 10/100 Mbps 802.3 media independent interface
(MII). It requires an external transceiver (PHY) to complete the interface to the media.
1.3.8
There are up to two FlexCAN modules on the MCF5235 (refer to
module is a communication controller implementing the 2.0B CAN protocol. The CAN protocol
is commonly used as an industrial control serial data bus, meeting the specific requirements of
real-time processing, reliable operation in a harsh EMI environment, cost-effectiveness, and
required bandwidth. FlexCAN contains 16 message buffers.
1.3.9
The MCF5235 contains three full-duplex UARTs that function independently. The three UARTs
can be clocked by the system bus clock, eliminating the need for an externally supplied clock.
They can use DMA requests on transmit-ready and receive-ready as well as interrupt requests for
servicing. Flow control via UnCTS and UnRTS pins is provided on all three UARTS.
Freescale Semiconductor
Fast Ethernet Controller (FEC)
FlexCAN
UARTs
SRAM
MCF5235 Reference Manual, Rev. 2
Table
1-1). The FlexCAN
Features
1-13