C8051F850-C-GM Datasheet, PDF (255/328 Pages) Silicon Laboratories – Low-Cost 8-bit MCU Family with up to 8 kB of Flash

Table 24.4. Hardware Address Recognition Examples (EHACK = 1)
Hardware Slave Address
SLV
0x34
0x34
0x34
0x34
0x70
Slave Address Mask
SLVM
0x7F
0x7F
0x7E
0x7E
0x73
GC bit Slave Addresses Recognized by
Hardware
0
0x34
1
0x34, 0x00 (General Call)
0
0x34, 0x35
1
0x34, 0x35, 0x00 (General Call)
0
0x70, 0x74, 0x78, 0x7C
24.4.6. Data Register
The SMBus Data register SMB0DAT holds a byte of serial data to be transmitted or one that has just been
received. Software may safely read or write to the data register when the SI flag is set. Software should not
attempt to access the SMB0DAT register when the SMBus is enabled and the SI flag is cleared to logic 0,
as the interface may be in the process of shifting a byte of data into or out of the register.
Data in SMB0DAT is always shifted out MSB first. After a byte has been received, the first bit of received
data is located at the MSB of SMB0DAT. While data is being shifted out, data on the bus is simultaneously
being shifted in. SMB0DAT always contains the last data byte present on the bus. In the event of lost
arbitration, the transition from master transmitter to slave receiver is made with the correct data or address
in SMB0DAT.
Rev. 1.0
230