4. List of Pin Functions....................................................................................................................................................... 12
Precautions for Product Design ................................................................................................................................... 58
6.2
Precautions for Package Mounting .............................................................................................................................. 59
6.3
Precautions for Use Environment ................................................................................................................................ 60
11. Pin Status in Each CPU State ........................................................................................................................................ 67
12.3 DC Characteristics....................................................................................................................................................... 76
12.3.1 Current Rating .............................................................................................................................................................. 76
12.4 AC Characteristics ....................................................................................................................................................... 80
12.4.1 Main Clock Input Characteristics .................................................................................................................................. 80
12.4.2 Sub Clock Input Characteristics ................................................................................................................................... 81
12.4.13 I C Timing ............................................................................................................................................................... 106
12.6 USB characteristics ................................................................................................................................................... 117
12.8.2 Write cycles and data hold time ................................................................................................................................. 122
12.9 Return Time from Low-Power Consumption Mode .................................................................................................... 123
Is the LTE Cat 1 module like the GPRS module, which can be used by simply inserting a common SIM card? Or does it require the cooperation of the operator to activate it like the NB-IOT module?...
How to use gpio32 and gpio33 as UART? Now I can only find one serial port in /dev, serial0, which is the serial port corresponding to GPIO14 and 15. I can't find the corresponding one for 32 and 33, a...
The concept of synchronization
Synchronization technology is a very important technology in digital communication systems. Generally speaking, digital communication systems must implement multiple syn...
[i=s]This post was last edited by fengke on 2021-4-20 16:30[/i]IntroductionThis document mainly introduces the modules needed when using the development board for development, as well as how to connec...
Next are the 2 review reports:
(1) https://en.eeworld.com/bbs/thread-1214040-1-1.html
(2) https://en.eeworld.com/bbs/thread-1214570-1-1.html
Continuing the research: printf
4. Serial port print inform...
0 Introduction In IT systems, single-point grounding faults are a very common fault. Once a single-point grounding fault occurs, the IT system will become a TN-S system. Although it can continue to o...[Details]
There are pros and cons to using STM32. There are many types --- but there are too many types, and the information is also messy. In addition, when calling the library, I often forget to use some fun...[Details]
Torque measurement methods can be divided into balanced force method, energy conversion method and transfer method. Among them, the transfer method involves the most types of torque measuring in...[Details]
Pure electric vehicles, PHEV plug-in hybrid vehicles, and ordinary hybrid vehicles, which one has more advanced technology? Pure electric vehicles are the most popular now and are also the focus of...[Details]
The weekly test has been going on for 23 weeks. This week's question is as follows: The oscilloscopes that engineers have on hand may not be the latest and most advanced. Taking the analysis of vario...[Details]
Batteries are the only source of power for portable electronic devices. Whether you're using a smartphone, fitness tracker, action camera, outdoor navigation device, camera, or handheld transceiver, ...[Details]
ITECH has recently launched a high-speed and high-performance photovoltaic/solar simulation power supply , which is another key product in the field of new energy testing. It can complete high-perf...[Details]
Santana died in Wolfsburg in 2012 and was buried in China in 2021. "With a Santana, you won't be afraid to travel around the world." A simple and direct advertising slogan portrays the reliable i...[Details]
In order to effectively manage the clock beat and ensure the real-time performance of the system, μC/OS-III not only adds a dedicated system task to manage the clock beat, but also adopts a hash ...[Details]
NI proposed the concept of virtual instruments in the 1970s. Virtual instruments are computer instrument systems designed by users on a computer-based platform, with virtual panels and software to im...[Details]
Recently, SIA published an article stating that the United States should indeed pay attention to the decline in its chip manufacturing share, but the focus should be placed on more places and not jus...[Details]
MAP gas mixtures are usually composed of common atmospheric gases such as carbon dioxide (CO2), nitrogen (N2) and oxygen (O2). The introduction of other gases, such as nitric oxide (N2O), argon (Ar) ...[Details]
Gasgoo recently learned from NavInfo that its wholly-owned subsidiary AutoChips has added another member to its automotive-grade MCU product line, the AC7801X. This is the first 32-bit Cortex-M0+ aut...[Details]
Using the powerful software function of OSC482L, the back electromotive force output of the permanent magnet motor can be measured and analyzed. The basic wiring form is: connect the A pen of the os...[Details]
New ST85MM programmable power line communication (PLC) modem natively supports the latest field-proven Meters and More and PRIME1.4 standards, increasing flexibility in smart meter deployments
...[Details]