
Philips Semiconductors
80C51 Family Derivatives
8XC552/562 overview
1996 Aug 06
26
Table 5.
Slave Receiver Mode
(Continued)
STATUS
STATUS OF THE
I
2
C BUS AND
APPLICATION SOFTWARE RESPONSE
CODE
TO/FROM S1DAT
TO S1CON
NEXT ACTION TAKEN BY SIO1 HARDWARE
(S1STA)
SIO1 HARDWARE
STA
STO
SI
AA
A0H
A STOP condition or
repeated START
condition has been
received while still
addressed as
SLV/REC or SLV/TRX
No STDAT action or
No STDAT action or
No STDAT action or
No STDAT action
0
0
1
1
0
0
0
0
0
0
0
0
0
1
0
1
Switched to not addressed SLV mode; no
recognition of own SLA or General call address
Switched to not addressed SLV mode; Own SLA will
be recognized; General call address will be
recognized if S1ADR.0 = logic 1
Switched to not addressed SLV mode; no
recognition of own SLA or General call address. A
START condition will be transmitted when the bus
becomes free
Switched to not addressed SLV mode; Own SLA will
be recognized; General call address will be
recognized if S1ADR.0 = logic 1. A START condition
will be transmitted when the bus becomes free.
Table 6.
Slave Transmitter Mode
STATUS
STATUS OF THE
I
2
C BUS AND
APPLICATION SOFTWARE RESPONSE
CODE
TO/FROM S1DAT
TO S1CON
NEXT ACTION TAKEN BY SIO1 HARDWARE
(S1STA)
SIO1 HARDWARE
STA
STO
SI
AA
A8H
Own SLA+R has been
received; ACK has
been returned
Load data byte or
load data byte
X
X
0
0
0
0
0
1
Last data byte will be transmitted and
ACK bit will be received
Data byte will be transmitted; ACK will be received
B0H
Arbitration lost in
SLA+R/W as master;
Own SLA+R has been
received, ACK has
been returned
Load data byte or
load data byte
X
X
0
0
0
0
0
1
Last data byte will be transmitted and ACK bit will
be received
Data byte will be transmitted; ACK bit will be
received
B8H
Data byte in S1DAT
has been transmitted;
ACK has been
received
Load data byte or
load data byte
X
X
0
0
0
0
0
1
Last data byte will be transmitted and
ACK bit will be received
Data byte will be transmitted; ACK bit will be
received
C0H
Data byte in S1DAT
has been transmitted;
NOT ACK has been
received
No S1DAT action or
no S1DAT action or
no S1DAT action or
no S1DAT action
0
0
1
1
0
0
0
0
0
0
0
0
0
1
0
1
Switched to not addressed SLV mode; no
recognition of own SLA or General call address
Switched to not addressed SLV mode; Own SLA will
be recognized; General call address will be
recognized if S1ADR.0 = logic 1
Switched to not addressed SLV mode; no
recognition of own SLA or General call address. A
START condition will be transmitted when the bus
becomes free
Switched to not addressed SLV mode; Own SLA will
be recognized; General call address will be
recognized if S1ADR.0 = logic 1. A START condition
will be transmitted when the bus becomes free.
C8H
Last data byte in
S1DAT has been
transmitted (AA = 0);
ACK has been
received
No S1DAT action or
no S1DAT action or
no S1DAT action or
no S1DAT action
0
0
1
1
0
0
0
0
0
0
0
0
0
1
0
1
Switched to not addressed SLV mode; no
recognition of own SLA or General call address
Switched to not addressed SLV mode; Own SLA will
be recognized; General call address will be
recognized if S1ADR.0 = logic 1
Switched to not addressed SLV mode; no
recognition of own SLA or General call address. A
START condition will be transmitted when the bus
becomes free
Switched to not addressed SLV mode; Own SLA will
be recognized; General call address will be
recognized if S1ADR.0 = logic 1. A START condition
will be transmitted when the bus becomes free.