MC74 Datasheet, PDF (6/12 Pages) ON Semiconductor – Serial Digital Temperature Sensor

SMBUS Write Timing Diagram
A
B
C
ILOW IHIGH
SCL
MC74
D
EF
G
H
IJ
K
LM
SDA
t _SU(START) t _H(START)
t _SU–DATA
t _H–DATA
t _SU(STOP) t _IDLE
A = Start Condition
B = MSB of Address Clocked into Slave
C = LSB of Address Clocked into Slave
D = R/W Bit Clocked into Slave
E = Slave Pulls SDA Line Low
F = Acknowledge Bit Clocked into Master J = Acknowledge Clocked into Master
G = MSB of Data Clocked into Slave
K = Acknowledge Clock Pulse
H = LSB of Data Clocked into Slave
L = Stop Condition, Data Executed by Slave
I = Slave Pulls SDA Line Low
M= New Start Condition
SMBUS Read Timing Diagram
A
B
C
D
EF
G
ILOW IHIGH
SCL
H
I
JK
SDA
t _SU(START) t _H(START)
t _SU–DATA
A = Start Condition
B = MSB of Address Clocked into Slave
C = LSB of Address Clocked into Slave
D = R/W Bit Clocked into Slave
E = Slave Pulls SDA Line Low
F = Acknowledge Bit Clocked into Master
G = MSB of Data Clocked into Master
H = LSB of Data Clocked into Master
Figure 2.
t _SU(STOP) t _IDLE
I = Acknowledge Clock Pulse
J = Stop Condition
K = New Start Condition
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