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| Freescale 自动汽油泵解决方案 | |||||
作者：Freescal… 文章来源：本站 点击数： 更新时间：2007-3-19  |
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Gas pumps have become information appliances allowing customers to fuel cars, pay for gas at the pump, offer merchandising opportunities to station owners and function as Web-based portals allowing remote monitoring without on-site personnel. Delivering comprehensive, high-level control; the MCF547x processor family enables next-generation automated gas pump/ATM, with a single device. Enabling significant design flexibility, the MCF547x devices offer multiple communications interfaces. Allows financial information and customer-specific marketing data to be collected with enhanced security and distributed via any Personal Area Network (PAN), Local Area Network (LAN) or Wide Area Network (WAN) interface, without significantly degrading system performance through the optional encryption accelerator featured on the MCF547x devices. A typical gas pump/ATM has several I/O systems, including card readers, cash-collection equipment, barcode scanners, speakers, pump electronics and a touch-screen interface. A control chip for this application requires many connectivity interfaces to control the system without having to add significant amounts of external logic. A number of different network connections are required. First, a LAN is typically offered for remotely monitoring the pump, printer paper and cash-acceptor levels; collecting diagnostic information; and performing system software upgrades. It is also useful to have a separate LAN interface to connect the fueling station to the Internet and to allow direct Web interaction with the customer. Many next-generation pumps include a WAN or PAN interface to collect user payment information, or to communicate directly between the pump and the vehicle. Because financial and personal data may be collected at the pump, it is essential that this information be transmitted securely without slowing the transaction. The Freescale Semiconductor MCF547x processor family is well suited to be the main control processor in next-generation information appliances, including automated gas fueling stations. The on-chip PCI interface offers straightforward control of LCD and touch-screen systems, and enables the use of different screen sizes and technologies. The wide range of connectivity peripherals on the MCF547x device - including four programmable serial controllers, two 10/100 Ethernet interfaces and the DMA-SPI (direct memory access–serial peripheral interface) - allows design flexibility. Block Diagram 
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