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15
Servicing the Interrupt
After servicing this interrupt, and transmitting the second part of the address, the Status register
contains one of the codes in Table 3-2.
Note: If a repeated START condition transmits, the status code is 10h instead of 08h.
Table 3-2. Codes After Servicing Interrupts (Master Transmit)
Code I
2
C State Microprocessor Response Next I
2
C Action
38h Arbitration lost Clear IFLG
OR
Set STA, clear IFLG
Return to idle
Transmit START when bus free
68h Arbitration lost,
SLA + W received,
ACK transmitted
Clear IFLG, AAK=0
OR
Clear IFLG, AAK=1
Receive data byte, transmit not ACK
Receive data byte, transmit ACK
B0h Arbitration lost,
SLA + R received,
ACK transmitted
Write byte to DATA, Clear IFLG,
AAK=0
OR
Write byte to DATA, Clear IFLG,
AAK=1
Transmit data byte, receive ACK
Transmit data byte, receive ACK
D0h Second Address byte +
W, transmitted ACK
received
Write byte to DATA, clear IFLG
OR
Set STA, clear IFLG
OR
Set STP, clear IFLG
OR
Set STA & STP, clear IFLG
Transmit data byte, receive ACK
Transmit repeated START
Transmit STOP
Transmit STOP, then START
D8h Second Address byte +
W, transmitted ACK
received
Same as code D0h Same as code D0h