About ARM chip examination questions, need detailed answers!
Author:Zhang dingchu Time:2021-07-20 12:30 Browse(62)
Just go to several ARM chip companies to see the solutions. You've got all of them, and they're more detailed
Go to several ARM chip companies to see the solutions. You've got all of these, and you'll have more details.
Huabang W90P710 / w90n745 adopts arm's ARM7TDMI microprocessor core and 0.18 μ In addition, the W90P710 / w90n745 also integrates USB 1.1 master / device controller, which enables various applications to connect various computer peripheral products through USB interface, The W90P710 / w90n745 integrates highly scalable EBI (external bus interface) interface.

About ARM chip examination questions, need detailed answers!

it can access ROM, flash, SDRAM, pcmcta card and other I / O components through EBI.
w90p7lo supports high-resolution TFT, STN LCD controller.
in addition to USB and EBI.
W90P710 / w90n745 also has UART interface, When designing various applications, customers can connect more devices, such as barcode scanner, VFD module, debugging port and Bluetooth module.
in addition to POS (point of sale) applications,
W90P710 is also suitable for data acquisition, data processing and data processing The standard operating frequency of MCU is 80 MHz.
W90P710 integrates abundant on-chip resources on the basis of arm7tdml,It can minimize the cost, reduce the expansion of the system, and reduce the volume of the product.
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smart card: it can be mounted through EBI bus with high cost performance The tda8007 chip with reliable performance can support tax control card and user card.
the card slot is on the back of the evaluation board.
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memory module: in this design, the memory is mounted in the system through EBI bus.
the memory can reach 16MB.
the program memory adopts 8MB norflash.
it is divided into two areas, the first area stores boot code, kernel image and file system, The second partition is used to store data.
in order to meet the needs of big data storage.
this design also implements a pluggable NAND memory, which separates the data storage module from the system motherboard.
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communication module: W90P710 supports three serial ports.
users can connect the scanner gun, VFD module, USB module, etc A Mac is built in W90P710.
a 10 / 100Mbps network port can be built by adding PHY, and a USB host and USB device controller are built in. The USB device can simulate the serial port.
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display module: W90P710 has built-in high-resolution TFT and stnlcd controllers.
it supports 8-bit LCD module and 192 ×
support VFD module display through SPI interface.
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keyboard: support 16 key matrix keyboard and PS2 keyboard.
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SD card: support SD card operation.
the card slot is on the back of the evaluation board.
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the evaluation board is equipped with the following functions:
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keyboard: support 16 key matrix keyboard and PS2 keyboard.
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SD card: support SD card operationAudio: headphone socket.
can play sound.
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debug module: use ice for tracking debugging and bootloader's first burning.
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3.1 application of Huabang W90P710 in tax controlled cash register.
the design scheme of tax controlled cash register based on W90P710 has embedded operating system, graphical operation interface, network processing, network management, etc Modem communication and file operation, etc.
the product is easy to expand.
large screen LCD screen is used.
a better man-machine interface is realized.
a unique data protection circuit is provided.
high reliability and anti-interference are realized to ensure the generation, storage and maintenance of tax data The hardware structure is shown in Figure 2.
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3.2 application of Huabang W90P710 in remote monitoring.
monitoring system can be divided into real-time monitoring and trigger mode monitoring.
appropriate monitoring mode can be designed according to specific situation.
if real-time monitoring is adopted, more network resources will be occupied and the cost is relatively high, However, the operation cost of the trigger mode is lower.
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after the trigger monitoring terminal is triggered.
start to take pictures; At the same time, its internal embedded control module completes the Internet access (including dial-up, PPP and TCP / IP protocol processing), and sends the captured image data to the control center host after packaging; After the host computer of the control center logs in to the Internet, it can browse the pictures sent by the monitoring point by running the server software.
the hardware structure diagram is shown in Figure 3.
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