IBASE IBD185 - Manual (Page 18)

18 IBD185 User Guide
I2C Device Read/Write
The two interfaces are providing generic command format for I2C bus
read/write operation.
The generic command format of an I2C operation can be shown below:
BudID SlvAdd CmdLen CmdCode Flag DatLen DatBuff
Bud ID
1:I2C1
2:I2C2
(7bits
SADD
<<1)
Length of
CmdCode
Command
code
0:Normal
1:Block
Length of
DatBuff
Data
bytes
Limitation:
The max length of command code limits in 8 bytes.
The max length of data byte limits in 32 bytes.
The generic command can be varied to several types of I2C read/write
operations. Such as Byte Write/Byte Read, Word Write/Word Read,
Sequential Write/Sequential Read, and Block Write/Block Read.
Stuff the command interface with proper arguments to perform different
kinds of I2C read/write depends on your needs.
Please refer to the user’s manual of your I2C slave device to transmit the
I2C command in correct format.