TC654 Microchip Technology, TC654 Datasheet - Page 5

• Manufacturer Part Number: TC654
• Description: (TC654 / TC655) PWM Fan Speed Controllers With Fan Fault Detection
• Manufacturer: Microchip Technology

FIGURE 1-1:
SCLK
SCLK
SMBus Read Timing Diagram
SDA
2002 Microchip Technology Inc.
SDA
SMBus Write Timing Diagram
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
A = Start Condition
B = MSB of Address Clocked into Slave
C = LSB of Address Clocked into Slave
D = R/W Bit Clocked into Slave
t
SU(START)
t
SU(START)
A
A
t
t
H(START)
H(START)
t
t
LOW
LOW
Bus Timing Data.
B
B
t
t
HIGH
HIGH
t
t
SU-DATA
SU-DATA
C
C
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
F = Acknowledge Bit Clocked into Master
G = MSB of Data Clocked into Slave
H = LSB of Data Clocked into Slave
I = Slave Pulls SDA Line Low
D
D
E
E
E F
F
t
H-DATA
G
G
J = Acknowledge Clocked into Master
K = Acknowledge Clock Pulse
L = Stop Condition, Data Executed by Slave
M = New Start Condition
J = Stop Condition
K = New Start Condition
H
I = Acknowledge Clock Pulse
H
TC654/TC655
I
I
J
t
SU(STOP)
K
DS21734A-page 5
t
SU(STOP)
L
J
t
t
IDLE
IDLE
M
K