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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

C State Microprocessor Response Next I

C Action

38h Arbitration lost Clear IFLG

Set STA, clear IFLG

Return to idle

Transmit START when bus free

68h Arbitration lost,

SLA + W received,

ACK transmitted

Clear IFLG, AAK=0

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

Write byte to DATA, Clear IFLG,

AAK=1

Transmit data byte, receive ACK

D0h Second Address byte +

W, transmitted ACK

received

Write byte to DATA, clear IFLG

Set STA, clear IFLG

Set STP, clear IFLG

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

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 94 95

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