The GY7508 RS232-SPI conversion module is a module that can convert RS232 (UART) serial port to SPI bus interface. It supports SPI master mode and slave mode, and has functions of hardware setting of serial port rate and software setting of SPI bus rate. This module is suitable for adding SPI bus interface to computers or control boards, performing SPI interface testing through RS232 or UART serial ports, and performing register reading and writing of components and EEPROM through SPI interface.
The GY7508 is a single‑channel RS232 (UART) to SPI bus converter that provides a standard SPI master interface and optional slave mode. It operates from a +5 V supply, outputs 3.3 V TTL signals and supports SPI clock rates up to 12 MHz. The module includes pins for baud‑rate selection, power, ground and the four SPI signals (SCK, MISO, MOSI, CS0).
The manual details the hardware layout, pin definitions, electrical characteristics, baud‑rate configuration, and a full set of serial commands for configuring SPI mode, channel, clock frequency and performing Easy‑SPI read/write operations. Example code for common SPI devices such as EEPROMs and DACs is provided, along with timing diagrams and application schematics. This manual is written in Chinese.
| Power Input | +5 V |
|---|---|
| Supply Voltage Range | 4.5 V – 5.5 V |
| Output Signal Level | 3.3 V TTL |
| Input Signal Level | 5 V TTL |
| Maximum SPI Clock Rate | 12 MHz |
| Supported Baud Rates | 9600, 19200, 57600, 115200 bps |
| Number of SPI Channels | 1 (CS0) |
The default baud rate is 115200 bps when the COMSET pins are not connected.
The GY7508 provides a single SPI channel (CS0).
The module can operate up to a 12 MHz SPI clock frequency.
It accepts 5 V TTL input signals.