c8051t623-g Silicon Laboratories, c8051t623-g Datasheet - Page 160

• Manufacturer Part Number: c8051t623-g
• Description: Full Speed Usb Eprom Mcu Family
• Manufacturer: Silicon Laboratories

Table 19.5. SMBus Status Decoding With Hardware ACK Generation Disabled (EHACK = 0)
0100
0101 0 X X
0010
0001
0000 1
Values Read
0
0
0
1
1
0
1
0
0
1 X
0 X
1 X
0 X
1 X
0 X
0
1
A slave byte was transmitted;
NACK received.
A slave byte was transmitted;
ACK received.
A Slave byte was transmitted;
error detected.
An illegal STOP or bus error
was detected while a Slave
Transmission was in progress.
A slave address + R/W was
received; ACK requested.
Lost arbitration as master;
slave address + R/W received;
ACK requested.
A STOP was detected while
addressed as a Slave Trans-
mitter or Slave Receiver.
Lost arbitration while attempt-
ing a STOP.
A slave byte was received;
ACK requested.
Current SMbus State
C8051T622/3 and C8051T326/7
(Continued)
Rev. 1.1
No action required (expecting
STOP condition).
Load SMB0DAT with next data
byte to transmit.
No action required (expecting
Master to end transfer).
Clear STO.
If Write, Acknowledge received
address
If Read, Load SMB0DAT with
data byte; ACK received address
NACK received address.
If Write, Acknowledge received
address
If Read, Load SMB0DAT with
data byte; ACK received address
NACK received address.
Reschedule failed transfer;
NACK received address.
Clear STO.
No action required (transfer
complete/aborted).
Acknowledge received byte;
Read SMB0DAT.
NACK received byte.
Typical Response Options
Values to
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
Write
0 X 0001
0 X 0100
0 X 0001
0 X
0 1
0 1
0 0
0 1
0 1
0 0
0 0
0 X
0 0
0 1
0 0
0000
0100
0000
0100
0000
1110
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