P87C554 NXP Semiconductors, P87C554 Datasheet - Page 45

• Manufacturer Part Number: P87C554
• Description: The P87C554 Single-Chip 8-Bit Microcontroller is manufactured inan advanced CMOS process and is a derivative of the 80C51microcontroller family
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 6.
2002 Mar 25
STATUS
STATUS
(S1STA)
(S1STA)
CODE
80C51 8-bit microcontroller – 12 clock operation
16K/512 OTP/RAM, 8 channel 10-bit A/D, I
capture/compare, high I/O
08H
10H
18H
20H
28H
30H
38H
A START condition has
been transmitted
A repeated START
condition has been
transmitted
SLA+W has been
transmitted; ACK has
b
been received
SLA+W has been
transmitted; NOT ACK
h
has been received
Data byte in S1DAT has
been transmitted; ACK
h
has been received
Data byte in S1DAT has
been transmitted; NOT
ACK h
ACK has been received
Arbitration lost in
SLA+R/W or
D
Data bytes
Master Transmitter Mode
SIO1 HARDWARE
SIO1 HARDWARE
STATUS OF THE
STATUS OF THE
diti
b
b
I
b
2
C BUS AND
b
h
i
d
b
i
i
d
d
i
d
Load SLA+W
Load SLA+W or
Load SLA+R
Load data byte or
no S1DAT action or
no S1DAT action or
no S1DAT action
Load data byte or
no S1DAT action or
no S1DAT action or
no S1DAT action
Load data byte or
no S1DAT action or
no S1DAT action or
no S1DAT action
Load data byte or
no S1DAT action or
no S1DAT action or
no S1DAT action
No S1DAT action or
No S1DAT action
TO/FROM S1DAT
TO/FROM S1DAT
APPLICATION SOFTWARE RESPONSE
2
C, PWM,
STA
X
X
X
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
TO S1CON
43
STO
0
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
SI
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
AA
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
SLA+W will be transmitted;
ACK bit will be received
As above
SLA+W will be transmitted;
SIO1 will be switched to MST/REC mode
Data byte will be transmitted;
ACK bit will be received
Repeated START 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 transmitted;
ACK bit will be received
Repeated START 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 transmitted;
ACK bit will be received
Repeated START 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 transmitted;
ACK bit will be received
Repeated START 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
I
not addressed slave will be entered
A START condition will be transmitted when the
bus becomes free
2
NEXT ACTION TAKEN BY SIO1 HARDWARE
C bus will be released;
P87C554
Product data