ColdFire Soft Modem Reference Design
This newest design tool is ideally suited for applications with infrequent, small data transfers (less than a few hundred bytes) such as remote utility management, remote data logging, point-of-sale terminals, transaction terminals, home automation systems, security systems, and set-top box back channel operations. In these applications, less is more, with the soft modem connection quickly established and the transaction complete before a higher speed modem would have finished negotiating the connection. Connecting via a modem and phone line is convenient because the system can be called at any time, from any place, to get a up-to-the-minute, comprehensive status report on all conditions being monitored including statistics such as quality level, real-time pricing or even power, voltage, time and errors.
Features
The soft modem reference design was developed to enable customers to easily add connectivity features in applications where typical transactions contain less than a few hundred bytes of data.
Full schematics detailing the hardware design and software development
Detailed applications note
Soft modem application software available in optimized source code
Key features of the Coldfire MCF5407 microprocessor include:
V4 ColdFire processor core with Harvard memory architecture and branch cache acceleration logic
316 (Dhrystone 2.1) MIPS @ 220 MHz
16K instruction-cache, 8K data-cache
4KB SRAM
Multiply Accumulate (MAC) with integer and fractional capabilities
Industry leading debug module offering both background and real-time capability
Hardware integer divide unit
Integrated processor (DRAM controller, 1 UART, 1 synchronous UART, four fully programmable DMA Channels, eight chip selects, 16-bit general purpose I/O, two 16-bit timers, I2C module, System Integration -- PLL, Software watchdog)
应用手册:
http://www.freescale.com/files/product/doc/AN2451.pdf
参考设计:
http://www.freescale.com/files/dsp/doc/ref_manual/MCF5407ATRM.pdf |
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