The 1-Wire protocol needs a very tight and time-critical signal generation, so it’s always been resource-consuming to write software able to communicate with 1-Wire slaves, or highly unreliable if running on a non-real-time operating system.
The AK-DS2482S-100 board allows to control one or many 1-Wire slave devices (like temperature sensors and EEPROMs) by simply sending I2C commands, relieving the task of generating the time-critical signals the 1-Wire protocol requires. It provides bidirectional protocol conversion between an I2C master (like a microcontroller) and 1-Wire slave devices.
The board is based on Maxim’s DS2482S-100+ chip and can be powered-up with 2.9V to 5.5V. It supports 100kHz and 400kHz I2C bus speed, includes solder jumpers to enable I2C bus pull-ups and a solder jumper to enable the Strong Pull-Up (SPU) through the on-board MOSFET.
- I2C to 1-Wire bridge
- Wide power supply range: 2.9V to 5.5V
- Supports 100kHz and 400kHz I2C
- Includes MOSFET for Strong Pull-Up control with the PCTLZ pin
- 1-Wire master IO with selectable active or passive 1-Wire pullup
- Provides reset/presence, 8-Bit, single-bit, and 3-Bit 1-wire IO sequences
- Standard and overdrive 1-Wire communication speeds
- Supports EEPROMs, temperature sensors, or other 1-Wire slaves that have momentary high source current modes
- Strong 1-Wire pull-up provided by an internal low-impedance signal path
- 2 mounting holes
- ENIG contacts
- Small size