EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 244

• Manufacturer Part Number: EZ80F91MCU
• Description: eZ80Acclaim-TM Flash Microcontrollers
• Manufacturer: ZILOG [Zilog, Inc.]

PS019209-0504
Table 118. I
If 10-bit addressing is used, the status code is
10-bit address, plus the Write bit, are successfully transmitted.
After this interrupt is serviced and the second part of the 10-bit address is trans-
mitted, the I2C_SR register contains one of the codes listed in Table 119.
Code
18h
20h
38h
68h
78h
B0h
Notes:
1. W is defined as the Write bit; i.e., the lsb is cleared to 0.
2. AAK is an I 2 C control bit that identifies which ACK signal to transmit.
3. R is defined as the Read bit; i.e., the lsb is set to 1.
I
Addr+W transmitted
ACK received
Addr+W transmitted,
ACK not received
Arbitration lost
Arbitration lost,
+W received,
ACK transmitted
Arbitration lost,
General call address
received, ACK
transmitted
Arbitration lost,
SLA+R received,
ACK transmitted
2
2
C Master Transmit Status Codes
C State
1
P R E L I M I N A R Y
3
Microcontroller Response
For a 7-bit address: write byte
to DATA, clear IFLG
Or set STA, clear IFLG
Or set STP, clear IFLG
Or set STA & STP, clear IFLG Transmit STOP
For a 10-bit address: write
extended address byte to data,
clear IFLG
Same as code 18h
Clear IFLG
Or set STA, clear IFLG
Clear IFLG, AAK = 0
Or clear IFLG, AAK = 1
Same as code 68h
Write byte to DATA, clear
IFLG, clear AAK = 0
Or write byte to DATA, clear
IFLG, set AAK = 1
18h
or
2
20h
after the first part of a
Product Specification
Next I
Transmit data byte,
receive ACK.
Transmit repeated
START.
Transmit STOP.
then START.
Transmit extended
address byte.
Same as code 18h.
Return to idle.
Transmit START
when bus is free.
Receive data byte,
transmit NACK.
Receive data byte,
transmit ACK.
Same as code 68h.
Transmit last byte,
receive ACK.
Transmit data byte,
receive ACK.
I
2
C Serial I/O Interface
eZ80F91 MCU
2
C Action
225