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1999 Aug 19
93
Philips Semiconductors
Objective Specification
Single-chip 8-bit microcontroller with CAN controller
P8xC591
Table 62
Master Receiver Mode
Table 63
Slave Receiver Mode
STATUS
CODE
(S1STA)
STATUS OF THE
I
2
C BUS AND
SIO1 HARDWARE
APPLICATION SOFTWARE RESPONSE
NEXT ACTION TAKEN BY SIO1
HARDWARE
TO/FROM S1DAT
TO S1CON
STA
STO
SI
AA
08H
A START condition has
been transmitted
A repeated START
condition has been
transmitted
Load SLA+WR
X
0
0
X
SLA+R will be transmitted; ACK bit will be
received
As above
SLA+W will be transmitted; SIO1 will be
switched to MST/TRX mode
I
2
C bus will be released; SIO1 will enter a
slave mode
A START condition will be transmitted
when the bus becomes free
Data byte will be received; NOT ACK bit
will be returned
Data byte will be received; ACK bit will be
returned
Repeated START condition will be
transmitted
STOP condition will be transmitted; STO
flag will be reset
STOP condition followed by a START
condition will be transmitted; STO flag will
be reset
Data byte will be received; NOT ACK bit
will be returned
Data byte will be received; ACK bit will be
returned
Repeated START condition will be
transmitted
STOP condition will be transmitted; STO
flag will be reset
STOP condition followed by a START
condition will be transmitted; STO flag will
be reset
10H
Load SLA+R or
Load SLA+W
X
X
0
0
0
0
X
X
38H
Arbitration lost in NOT
ACK bit
no S1DAT action or
0
0
0
X
no S1DAT action
1
0
0
X
40H
SLA+R has been
transmitted; ACK has
been received
no S1DAT action or
0
0
0
0
no S1DAT action
0
0
0
1
48H
SLA+R has been
transmitted; NOT ACK
has been received
no S1DAT action or
1
0
0
X
no S1DAT action or
0
1
0
X
no S1DAT action
1
1
0
X
50H
Data byte has been
received; NOT ACK has
been returned
Read data byte or
0
0
0
0
read data byte
0
0
0
1
58H
Data byte has been
received; ACK has
been returned
Read data byte or
1
0
0
X
read data byte or
0
1
0
X
read data byte
1
1
0
X
STATUS
CODE
(S1STA)
STATUS OF THE
I
2
C BUS AND
SIO1 HARDWARE
APPLICATION SOFTWARE RESPONSE
NEXT ACTION TAKEN BY SIO1
HARDWARE
TO/FROM S1DAT
TO S1CON
STA
STO
SI
AA
60H
Own SLA+W has been
received; ACK has
been returned
No S1DAT action or
X
0
0
0
Data byte will be received and NOT ACK
will be returned
Data byte will be received and ACK will be
returned
Data byte will be received and NOT ACK
will be returned
Data byte will be received and ACK will be
returned
no S1DAT action
X
0
0
1
68H
Arbitration lost in
SLA+R/W as master;
Own SLA+W has been
received, ACK returned
No S1DAT action or
X
0
0
0
no S1DAT action
X
0
0
1