TC664 datasheet(5/36 Pages) MICROCHIP

5 / 36 page

 2002 Microchip Technology Inc.

DS21737A-page 5

TC664/TC665

FIGURE 1-1:

Bus Timing Data.

tSU(START) tH(START)

tSU-DATA

tSU(STOP)tIDLE

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

I J

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

J = Acknowledge Clocked into Master

K = Acknowledge Clock Pulse

L = Stop Condition, Data Executed by Slave

M = New Start Condition

tLOW tHIGH

SCLK

SDA

tH-DATA

SMBus Write Timing Diagram

tSU(START) tH(START)

tSU-DATA

tSU(STOP)

tIDLE

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 F

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

tLOW tHIGH

I = Acknowledge Clock Pulse

J = Stop Condition

K = New Start Condition

SCLK

SDA

SMBus Read Timing Diagram

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