An I2C/SPI master interface board using bit-bang techniques and utilizes the Z80-Retro! parallel printer port. The PCB design includes 4 I2C ports and 4 SPI ports. The I2C ports are all common and the SPI ports include 4 individual chip select (CS) lines.

SPI SD Card Interface for Z80 Systems This web page documents a high-speed SPI interface I built for a Z80 system. It is capable of transferring a byte in just 1 µs. Assembly Interface

2022年7月10日 · Of course you can interface a Z80 with an SPI device, just like you can with any CPU or MCU that has no built-in SPI. All you need is a GPIO port of some sorts and control the pins in software. This is how CPUs and MCUs interfaced with synchronous serial devices before Motorola decided to integrate a configurable peripheral to interface with ...

Example of using the Z-80 PIO to communicate with the SPI style interface, just sends data no receive function. My first test was using only two pins to drive the data and clk lines, just...

SuperMEZ80-SPI is a Z80 mezzanine board for simple single board computer EMUZ80. SuperMEZ80-SPI add SRAM and SPI micro SD Card slot to the EMUZ80. With SuperMEZ80-SPI, you can run CP/M 2.2 disk images from the z80pack on the EMUZ80.

2015年10月26日 · I am attempting to make a retro computer using a z80 and ideally would like to give it the ability to boot from an SD card. I am 100% set on using a z80 and do not want to use a microcontroller with an internal SPI hardware interface.

你可以在常规的io上进行spi通信。你只需要一个边沿中断来控制时钟信号，以及一个电平中断来控制芯片选择。其他所有操作都可以在软件中完成。发送数据时，将芯片选择保持低电平，并按照所需速率在mosi上时钟输出位。

The Serial Interface board was designed by Peter Murray to allow the Z80 to communicate on its 8-bit parallel data bus through a 5v Arduino Nano to your I2C and SPI devices like RTC, SD, weather sensor, etc.

2021年4月25日 · I've been experimenting with a Z80 SPI interface and I found this interesting Z80 SPI interface article on the web. I attached a PDF of the article which includes the original link and author. I've implemented the circuit making some adjustments for voltage level translation from 5v to 3.3v although the circuit is a mix of 5v TTL and an 3.3v SD ...

It is capable of transferring a byte in just 1 μs. First the byte to be transmitted is written to port 0, then a write to port 1 causes the SPI transfer to take place. Finally, a read from port 0 retrieves …