LMH0318_15 Datasheet, PDF (20/57 Pages) Texas Instruments – LMH0318 3 Gbps HD/SD SDI Reclocker with Integrated Cable Driver

LMH0318
SNLS508 – SEPTEMBER 2015
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Writing data from a master to a slave comprises of 3 parts as noted in figure Figure 5
• The master begins with start condition followed by the slave device address with the R/W bit cleared
• The 8-bit register address that will be written
• The data byte to write
Figure 5. SMBus Write Operation
SMBus read operation consists of four parts
• The master initiates the read cycle with start condition followed by slave device address with the R/W bit
cleared
• The 8-bit register address that is to be read
• After acknowledgment from the slave, the master initiates a re-start condition
• The slave device address is resent followed with R/W bit set
• After acknowledgment from the slave, the data is read back from the slave to the master. The last ACK is
high if there are no more bytes to read
Figure 6. SMBus Read Operation
t_BUF
t_HD:STA
Se_*e
Note
t_LOW
t_R
t_HD:DAT
t_HIGH
t_F
t_SU:STA
t_SU:DAT
SP
ST
ST
Figure 7. SMBus Timing Parameters
t_SU:STO
SP
SCL
SDA
20
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