The GY7632 RS232-SPI Adapter is a product produced by Wuhan Jiyang Optoelectronics Technology Co., Ltd. It is an adapter that converts RS232 serial port to SPI bus interface. It has a standard SPI master interface and slave interface, supports SPI slave mode and SPI master mode, and can perform SPI read and write operations. The adapter can control the SPI interface read and write operations through serial port software commands, suitable for serial port to SPI conversion requirements of PC and embedded systems.
The GY7632 RS232‑SPI Adapter provides a conversion between a standard RS232 DB9 serial port and a dual‑channel SPI bus. It supplies 3.3 V TTL output, accepts 5 V TTL input, and supports up to 12 MHz SPI clock rates. The device is powered from a +5 V supply and measures 70 × 45 mm.
The manual describes the physical connectors, electrical characteristics, default serial baud rate (115200 bps), how to change baud settings, software command set for SPI read/write operations, timing diagrams, and example applications such as EEPROM programming. Troubleshooting tips address common connection and command issues. This manual is written in Chinese.
| Power Input | +5 V |
|---|---|
| Output Signal Level | 3.3 V TTL |
| Input Signal Level | 5 V TTL (acceptable) |
| Supported Serial Baud Rates | 9600, 119200, 57600, 115200 bps |
| Maximum SPI Clock Frequency | 12 MHz |
| Physical Size | 70 × 45 mm |
| SPI Channels | 2 (CS0, CS1) |
| Default Serial Baud Rate | 115200 bps |
The adapter ships with a default serial baud rate of 115200 bps.
Baud rate is selected by the COMSET0 and COMSET1 pins: shorting a pin to GND sets a ‘0’, leaving it floating sets a ‘1’. The combination determines the baud rate.
The adapter can operate up to a 12 MHz SPI clock frequency.
It provides two SPI channels, selectable via CS0 and CS1 signals.