80C554 Datasheet, PDF (44/76 Pages) NXP Semiconductors – 80C51 8-bit microcontroller . 6 clock operation 16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O, 64L LQFP

Philips Semiconductors
80C51 8-bit microcontroller – 6 clock operation
16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I²C, PWM,
capture/compare, high I/O, 64L LQFP
Preliminary specification
80C554/83C554/87C554
Table 6. Master Transmitter Mode
STATUS
CODE
(S1STA)
STATUS OF THE
I²C BUS AND
SIO1 HARDWARE
APPLICATION SOFTWARE RESPONSE
TO/FROM S1DAT
TO S1CON
STA STO SI AA
NEXT ACTION TAKEN BY SIO1 HARDWARE
08H A START condition has Load SLA+W
been transmitted
X
0
0 X SLA+W will be transmitted;
ACK bit will be received
10H A repeated START
condition has been
transmitted
Load SLA+W or
Load SLA+R
X
0
0 X As above
X
0
0 X SLA+W will be transmitted;
SIO1 will be switched to MST/REC mode
18H SLA+W has been
Load data byte or
0
transmitted; ACK has
been received
no S1DAT action or 1
no S1DAT action or 0
no S1DAT action
1
0 0 X Data byte will be transmitted;
ACK bit will be received
0 0 X Repeated START will be transmitted;
1 0 X STOP condition will be transmitted;
STO flag will be reset
1 0 X STOP condition followed by a
START condition will be transmitted;
STO flag will be reset
20H SLA+W has been
Load data byte or
0
transmitted; NOT ACK
has been received
no S1DAT action or 1
no S1DAT action or 0
no S1DAT action
1
0 0 X Data byte will be transmitted;
ACK bit will be received
0 0 X Repeated START will be transmitted;
1 0 X STOP condition will be transmitted;
STO flag will be reset
1 0 X STOP condition followed by a
START condition will be transmitted;
STO flag will be reset
28H Data byte in S1DAT has Load data byte or
0
been transmitted; ACK
has been received
no S1DAT action or 1
no S1DAT action or 0
no S1DAT action
1
0 0 X Data byte will be transmitted;
ACK bit will be received
0 0 X Repeated START will be transmitted;
1 0 X STOP condition will be transmitted;
STO flag will be reset
1 0 X STOP condition followed by a
START condition will be transmitted;
STO flag will be reset
30H Data byte in S1DAT has Load data byte or
0
been transmitted; NOT
ACK has been received _{no S1DAT action or}
1
no S1DAT action or 0
no S1DAT action
1
0 0 X Data byte will be transmitted;
ACK bit will be received
0 0 X Repeated START will be transmitted;
1 0 X STOP condition will be transmitted;
STO flag will be reset
1 0 X STOP condition followed by a
START condition will be transmitted;
STO flag will be reset
38H Arbitration lost in
SLA+R/W or
Data bytes
No S1DAT action or 0
0
0 X I²C bus will be released;
not addressed slave will be entered
No S1DAT action
1
0 0 X A START condition will be transmitted when the
bus becomes free
2000 Nov 10
44