Philips Semiconductors
Preliminary specification
80C51 8-bit microcontroller
8K/256 OTP, 8 channel 10 bit A/D, I
2
C, PWM,
capture/compare, high I/O, low voltage (2.7V鈥?.5V), low power
P87C552
RECEPTION OF THE OWN SLAVE ADDRESS
AND ONE OR MORE DATA BYTES
ALL ARE ACKNOWLEDGED.
LAST DATA BYTE RECEIVED IS
NOT ACKNOWLEDGED
ARBITRATION LOST AS MST AND
ADDRESSED AS SLAVE
RECEPTION OF THE GENERAL CALL ADDRESS
AND ONE OR MORE DATA BYTES
LAST DATA BYTE IS NOT ACKNOWLEDGED
ARBITRATION LOST AS MST AND ADDRESSED AS SLAVE BY GENERAL CALL
FROM MASTER TO SLAVE
FROM SLAVE TO MASTER
Data
A
ANY NUMBER OF DATA BYTES AND THEIR ASSOCIATED ACKNOWLEDGE BITS
n
THIS NUMBER (CONTAINED IN S1STA) CORRESPONDS TO A DEFINED STATE OF THE I
2
C BUS. SEE TABLE 8.
Figure 41. Format and States in the Slave Receiver Mode
1999 Mar 30
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S
SLA
W
A
DATA
A
DATA
SLA
A
P or S
60H
80H
80H
A0H
A
P or S
88H
A
68H
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GENERAL
CALL
A
DATA
A
DATA
A
P or S
70H
90H
90H
A0H
A
P or S
98H
A
78H
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SU00973
41