User guide

CY3280-MBR3 Evaluation Kit User Guide, Doc. #: 001-89905 Rev. *B 77

Advanced Topics

Figure 6-5. Reading from I

C Slave in BCP

The command format to communicate with this kit using the BCP is as follows:

■ Write data command format: To write ‘N’ bytes of data after the register offset address, use this

format to send data.

■ Read data command format: To read ‘N’ bytes of data beginning with the register offset address,

use this format to receive data.

Notes:

■ The Write/Read transaction with an MBR3 device requires specifying an offset address to the

MBR3 device from which the data reading/writing should start. The MBR3 device automatically

increments the register address for every byte after the offset address. Therefore, a Read/Write

transaction with an MBR3 device starts with an I

C write operation to specify the register offset to

the MBR3 device.

■ All bytes in the IIC file are in hex format.

The status box below the editor window shows the offset register content, where:

■ w – Write command.

■ Address – Slave device address (in hex). Default address for the device on this kit is 0x37.

■ Register offset – Offset address of the configuration register you want to write. See the datasheet

for the list of registers and their offset addresses.

■ Data – Write ‘N’ byte data here to write sequentially beginning with the offset address.