Recommendations on ARM chip selection

Currently, arm is common in the Chinese market, including NXP (Philips), Samsung, Atmel, Ti, and Adi. According to user requirements and application fields, you can select from the following aspects:

1. Speed (for common applications): The main clock speed of ARM7 is 20 ~ 133 m, 100 ~ 233 m, arm10 up to 700 m, if the speed requirement is higher, you can also use multi-core arm, such as minspeed ARM chips.

2. Memory (conventional applications): Generally, arm is equipped with Flash (Program) and SRAM (data). ATMEL's arm comes with the largest memory capacity. If you want to expand external SDRAM, Atmel, Samsung, and NXP can all be used.

3. MCU upgrade (conventional applications): If you want to upgrade from the original single-chip microcomputer system (speed, gpio, etc.), you can choose NXP arm, which is the most cost-effective for the company's arm, some models can be purchased within 30 RMB, and have Zhou ligong SCM technical support, rich development tools and technical materials.

4. USB interface (special application): Samsung's arm has a built-in USB Host/device interface, and NXP's arm also has a built-in USB (full speed) interface.

5. AD/DA (data collection and industrial control): ADI is mainly used for analog chips. Therefore, its ARM chips are basically embedded with AD and DA, and the number of digits and speed are the best.

6. Ethernet (Embedded Web and modem): Samsung and ATMEL are equipped with multiple arm Ethernet controllers, and some NXP arm also have.

7. DSP (Signal Processing): ti dsp is the most famous company. Therefore, the arm produced by this company has built-in DSP processor. The arm of Motolora also has built-in DSP.

8. Audio/Video interfaces (audio/video devices): There is no doubt that we should select the Philips arm, such as saa7750.

9. FPGA (complex logic circuit): Altera specializes in EPLD/FPGA, and its arm has built-in FPGA, such as epxa1, epxa4, and epxa10. The number of built-in FPGA door circuits is 100 k, 400 k, and 1000 K, respectively.

10, Cortex-M3 (the latest ARM kernel, cost-effective): Domestic popular st stm32 series, NXP lpc13xx series and Ti lm3s series, among which stm32 is the most popular, show the limelight.