Recently, in collaboration with engineers from Renesas and RT-Thread, we have completed the framework and tutorial for creating the RT-Thread BSP for the Renesas Cortex-M RA series MCUs. This means that developers using the RA series MCUs (RA2 series, RA4 series, RA6 series) can quickly create their own BSPs based on the tutorial and develop … Read more
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Today, the ARM Cortex-M processor family has 8 processor members. In addition, ARM’s product line includes many other processor members. For many beginners, and even for some chip designers with rich experience but not familiar with ARM series processors, it is easy to confuse these products. Different ARM processors have different instruction sets, system functions, … Read more
With the widespread development of smartphones, users’ understanding of smart devices has become increasingly profound. The notion that “user experience does not equal hardware stacking” has taken root in people’s minds. Indeed, a product’s user experience is determined by many factors, including design, configuration, software, network, and battery life… Many aspects influence your experience when … Read more
[Image]Whether it’s CPU, GPU, or flash memory, the manufacturing process is a core factor that determines their performance. From the surface numbers, a smaller process number indicates more advanced technology, allowing more transistors to fit into a smaller space, reducing leakage current, enhancing overall chip performance, and lowering power consumption. However, due to the lack … Read more
Qualcomm‘s Snapdragon processors are one of the most common SoCs in the Android smartphone field. Samsung uses Snapdragon in its various market Galaxy S series, but these chips also power the vast majority of flagship Android phones on the market. However, Snapdragon chips are not only found in expensive flagship smartphones; there is a whole … Read more
How to Disassemble and Reassemble CPU at 230 Degrees – A Guide for A10, A9, A8 and More
Cortex-X1: The Bigger Arm Arm targets larger, bigger, and smaller designs with X1 and Cortex-A78 Linley Gwennap (June 1, 2020) To assist mobile users in developing a three-layer CPU cluster, Arm has introduced two new high-end cores: the larger Cortex-A78 and the even larger Cortex-X1. The X1 is the first in the more powerful mobile … Read more
Source: Chip Theory Introduction: Nowadays, CPUs or SoCs are basically integrated with multiple CPU cores in a single chip, forming what is commonly referred to as 4-core, 8-core, or more core CPUs or SoC chips. Why adopt this approach? How do multiple CPU cores work together? Is more CPU cores always better? With these questions, … Read more
关注、星标公众号，直达精彩内容 来源：ZYNQ 作者：小墨 每个 Cortex-A9 处理器都有自己的私有 32 位定时器和 32 位看门狗定时器，两个处理器共享一个全局 64 位定时器，这些定时器始终以 CPU 频率 (CPU_3x2x) 的 1/2 计时。 CPU 专用和看门狗模块都具有以下特性： 32 位计数器在达到零时产生中断 8 位预分频器可更好地控制中断周期 可配置的单发或自动重新加载模式 计数器的可配置起始值 时钟 所有私有计时器和看门狗计时器始终以 CPU 频率 (CPU_3x2x) 的 1/2 计时 中断到 PS 中断控制器 发送到中断控制器的中断CPU专用外设中断(PPI) 中描述，每个 CPU 都连接到一组私有的五个外设中断，PPI 列于如下 PPI 的灵敏度类型是固定的，不能更改，因此，ICDICFR1 寄存器是只读的，因为它指定了所有 5 个 PPI 的敏感类型。 注意，来自PL的快速中断（FIQ）信号和中断（IRQ）信号被反转，然后发送到中断控制器。 因此，它们在 PS-PL 接口处为高电平有效，尽管 ICDICFR1 寄存器将它们反映为低电平有效 … Read more