1. SPI Bus The Serial Peripheral Interface (SPI) bus technology is a synchronous serial interface introduced by Motorola. Most MCUs (Microcontrollers) produced by Motorola, such as the 68 series MCUs, are equipped with SPI hardware interfaces. SPI is used for full-duplex, synchronous serial communication between the CPU and various peripheral devices. It can simultaneously transmit … Read more
Buses, buses, you always get caught up in them. All signals in this world are the same, but there are thousands of buses, which can be quite a headache. In general, there are three types of buses: internal buses, system buses, and external buses. The internal bus connects various peripheral chips within the microcomputer to … Read more
Background The I2S bus is a common bus that needs to be mastered. Concepts The I2S (Inter-IC Sound) bus, also known as the integrated circuit built-in audio bus, is a bus standard formulated by Philips for audio data transmission between digital audio devices. This bus is responsible for data transmission between audio devices and is … Read more
DAC Model: ES7148. Package: QFN12. Operating Temperature: -40~+85℃. 1. Overview The ES7148 is a 12-pin, 24-bit stereo D/A converter that uses PCM (Pulse Code Modulation). It supports 24-bit word length I2S serial audio data format input. Utilizing multi-bit ∆-Σ modulation technology, it converts digital signals to dual-channel analog signal output. The multi-bit ∆-Σ modulator makes … Read more
After successfully reading the SD card with the SDIO module on STM32F4 at the end of last month (see: STM32 SDIO Troubleshooting), I finally implemented a simple FAT32 file system, and then read the WAV files on the card to output signals to my CS4398 DAC to play music. Despite being quite rudimentary, I have … Read more
1. SPI BusThe Serial Peripheral Interface (SPI) bus technology was introduced by Motorola and is a synchronous serial interface. Most MCUs (Microcontrollers) produced by Motorola, such as the 68 series MCUs, are equipped with SPI hardware interfaces. SPI is used for full-duplex, synchronous serial communication between the CPU and various peripheral devices. SPI can simultaneously … Read more
Bus Buses are everywhere. Signals in this world are the same, but there are thousands of buses, which can be quite confusing. In general, there are three types of buses: internal buses, system buses, and external buses. Internal buses connect various peripheral chips with the processor within a microcomputer; system buses connect plug-in boards with … Read more