C8051F330-GMR Datasheet, PDF (147/210 Pages) Silicon Laboratories – Mixed-Signal ISP Flash MCU

C8051F330/1/2/3/4/5
Table 15.4. SMBus Status Decoding
Values Read
Current SMbus State
Typical Response Options
Values
Written
1110
0
0
X
A master START was generated.
Load slave address + R/W
into SMB0DAT.
00X
0
0
0
A master data or address byte
was transmitted; NACK received.
Set STA to restart transfer.
Abort transfer.
10X
01X
Load next data byte into
SMB0DAT.
00X
End transfer with STOP.
01X
1100
0
0
1
A master data or address byte
was transmitted; ACK received.
End transfer with STOP and
start another transfer.
1
1
X
Send repeated START.
10X
Switch to Master Receiver _{0 0 X}
Mode (clear SI without writ-
ing new data to SMB0DAT).
Acknowledge received byte; _{0 0 1}
Read SMB0DAT.
Send NACK to indicate last _{0 1 0}
byte, and send STOP.
Send NACK to indicate last
byte, and send STOP fol-
lowed by START.
110
Send ACK followed by
repeated START.
1000
1
0
X
A master data byte was received;
ACK requested.
Send NACK to indicate last
byte, and send repeated
START.
101
100
Send ACK and switch to
Master Transmitter Mode
(write to SMB0DAT before
clearing SI).
001
Send NACK and switch to
Master Transmitter Mode
(write to SMB0DAT before
clearing SI).
000
Rev. 1.7
151