8XC552 Datasheet, PDF (12/60 Pages) NXP Semiconductors – 80C51 FAMILY DERIVATIVES

Philips Semiconductors
80C51 Family Derivatives
8XC552/562 overview
I²C bus
V_DD
R_P
R_P
SDA
SCL
P1.7/SDA P1.6/SCL
8XC552
Other Device with
I²C Interface
Other Device with
I²C Interface
Figure 10. Typical I²C Bus Configuration
SDA
MSB
Slave Address
SCL
S
1
2
Start
Condition
R/W
Direction
Bit
Acknowledgment
Signal from Receiver
Acknowledgment
Signal from Receiver
Clock Line Held Low While
Interrupts Are Serviced
7
8
9
ACK
1
2
3–8
9
ACK
Repeated if more bytes
are transferred
Figure 11. Data Transfer on the I²C Bus
Stop
Condition
Repeated
Start
Condition
P/S
1996 Aug 06
12