Reference
Last revision 2025/12/15
This article delves into the communication protocols of the SD740 module, highlighting three interfaces: I2C with 7-bit addressing, SPI in mode 0 with a maximum speed of 40 MHz, and Analog outputs with a resolution of 10-bit. Each interface's characteristics and operational details provide a comprehensive understanding of the module's capabilities.
Communication Protocol Description
The SD740 module supports three interfaces:
- I2C: 7-bit address (0x4E or 0x4F, set via MISO/ADDR pin), standard I2C communication speed.
- SPI: Mode 0 (CPOL=0, CPHA=0), maximum speed 40 MHz, uses CSN pin for chip selection.
- Analog: Ratio metric outputs with range Vdd0.1 to Vdd0.9, 10-bit resolution.
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