Winbond ARM W90N740 chip and its application in tax control machines and routers: This article introduces the characteristics and structural framework of Winbond ARM chip W90N740 in the current domestic market, and elaborates on the application of two typical solutions of W90N740 in the tax control and network terminal markets. Keywords: W90N740, tax control, tax control cash register, router, network terminal 1. Characteristics of Winbond ARM W90N740 Winbond\'s W90N740 is an ARM7 chip with ARM7TDMI core and RISC structure. W90N740 contains two 10/100Mb MAC Ethernet controllers and uses network accelerator NAT. The device accelerates the conversion of network data packets in hardware, reduces the burden of W90N740, and improves the overall system performance. The two USB HOST1.1 integrated in the chip connect various peripheral USB devices through the USB interface, increasing the function of the product and making the product more convenient and practical. W90N740 adopts RISC (Reduced Instruction) instruction system, with 8K instruction cache and 2K data cache integrated in the chip, which can also be set as internal RAM or CACHE. It can be interconnected with external SDRAM, ROM/SRAM, flash or other I/O devices through EBI (External Expansion Bus). In addition, W90N740 also integrates GDMA controller and WDT. Therefore, it has a wide range of applications in many application fields, especially network products, such as routers, network monitoring, IP Phone and other fields. Figure 1 is the structure of Winbond ARM chip W90N740D. Let\'s take a look at two solutions based on W90N740 to understand this Winbond ARM chip.
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