Preliminary W78E378/W78C378/W78C374
Master/Transmitter Mode
Set STA to generate
a START.
From Slave Mode (C)
08H
A START has been
transmitted.
(STA,STO,SI,AA)=(0,0,0,X)
SLA+W will be transmitted;
ACK bit will be received.
From Master/Receiver (B)
18H
SLA+W has been transmitted;
ACK has been received.
or
20H
SLA+W has been transmitted;
NOT ACK has been received.
(STA,STO,SI,AA)=(0,1,0,X)
A STOP will be transmitted;
STO flag will be reset.
(STA,STO,SI,AA)=(0,0,0,X)
Data byte will be transmitted;
ACK will be received.
(STA,STO,SI,AA)=(1,0,0,X)
A repeated START will be transmitted.
(STA,STO,SI,AA)=(1,1,0,X)
A STOP followed by a START will be
transmitted;
STO flag will be reset.
28H
10H
Send a STOP
Send a STOP
followed by a START
Data byte in S1DAT has been transmitted;
ACK has been received.
A repeated START has been
transmitted.
or
30H
Data byte in S1DAT has been transmitted;
NOT ACK has been received.
(STA,STO,SI,AA)=(0,0,0,X)
SLA+R will be transmitted;
38H
ACK bit will be received;
SIO1 will be switched to MST/REC mode.
Arbitration lost in SLA+R/W
or Data bytes.
To Master/Receiver (A)
(STA,STO,SI,AA)=(0,0,0,X)
(STA,STO,SI,AA)=(1,0,0,X)
A START will be transmitted when
the bus becomes free.
I2C bus will be released;
Not addressed SLV mode will be entered.
Enter NAslave
Send a START
when bus becomes free
Publication Release Date: December 1999
Revision A1
- 21 -
WINBOND [ WINBOND ]
