The master supports three different modes. There are two low-level modes:

• I2C
• master transmitter
• master receiver
• combined transfers (master transmitter and receiver with a repeated START)
• SMBus
• quick command
• send/receive byte
• write/read byte
• write/read word
• process call
• block write/read
• block write block read process call
• packet error checking (PEC)

Additional there is high-level mode, which is based on the IRD concept

The master window of I2C Studio offers an impressive number of features:

• messages are structured in a list of macros
• macros can be disabled/enabled individually to include/exclude them from the next transfer
• messages/macros can be named
• messages/macros can be moved/copied
• binary data to be sent can be read from a file
• I2C bitrate can be configured (full-/high-speed)
• send loop: complete message tree can be sent in a loop
• detailed error messages
• monitoring of SCL/SDA-stretching (time-out)
• monitoring of I2C Vcc