Philips Semiconductors
Product data
P83C654X2/P87C654X2
80C51 8-bit microcontroller family
16 kB OTP/ROM,
256B RAM, low voltage (2.7 to 5.5 V), low power, high speed
(30/33 MHz)
2004 Apr 20
45
Table 11.
Slave Receiver Mode
STATUS
CODE
(S1STA)
STATUS OF THE
I
2
C BUS AND
HARDWARE
APPLICATION SOFTWARE RESPONSE
TO/FROM S1DAT
TO S1CON
NEXT ACTION TAKEN BY I
2
C HARDWARE
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
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
Data byte will be received and NOT ACK will be
returned
no S1DAT action
X
0
0
1
Data byte will be received and ACK will be returned
70H
General call address
(00H) has been
received; ACK has
received ACK has
been returned
No S1DAT action or
X
0
0
0
Data byte will be received and NOT ACK will be
returned
no S1DAT action
X
0
0
1
Data byte will be received and ACK will be returned
78H
Arbitration lost in
SLA+R/W as master;
General call address
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
no S1DAT action
X
0
0
1
Data byte will be received and ACK will be returned
80H
Previously addressed
with own SLV
address; DATA has
been received ACK
has been returned
Read data byte or
X
0
0
0
Data byte will be received and NOT ACK will be
returned
read data byte
X
0
0
1
Data byte will be received and ACK will be returned
88H
Previously addressed
with own SLA; DATA
byte has been
received; NOT ACK
has been returned
Read data byte or
0
0
0
0
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.
read data byte or
0
0
0
1
read data byte or
1
0
0
0
read data byte
1
0
0
1
90H
Previously addressed
with General Call;
DATA byte has been
d ACK h
received; ACK has
been returned
Read data byte or
X
0
0
0
Data byte will be received and NOT ACK will be
returned
read data byte
X
0
0
1
Data byte will be received and ACK will be returned
98H
Previously addressed
with General Call;
DATA byte h
received; NOT ACK
has been returned
b
Read data byte or
0
0
0
0
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.
read data byte or
0
0
0
1
read data byte or
1
0
0
0
read data byte
1
0
0
1