Read Byte Timing; Write Byte Timing; Write Byte Stop Timing - Texas Instruments UCD3138 Technical Reference Manual

PMBus Slave Mode Low Level Timing
PMBUS_CLK
PMBUS_DATA
DATA_REQUEST(3)
Write to TXBUF
Note: Stretch is optional, depending on firmware timing.
PMBUS_CLK
PMBUS_DATA
DATA_RDY
RD_BYTE_COUNT
PMBUS_CLK
PMBUS_DATA
EOM
PEC_VALID
DATA_RDY
RD_BYTE_COUNT
370
PMBus Interface/I2C Interface
Data Byte
1 2
Figure 10-19. Read Byte Timing
A
1
Figure 10-20. Write Byte Timing
Data Byte
1 2
Figure 10-21. Write Byte Stop Timing
Copyright © 2016, Texas Instruments Incorporated
(Stretch)
7 8
t
DREQ3
Data Byte
2 7
A
7 8
SNIU028A – February 2016 – Revised April 2016
www.ti.com
A
t
TXBWRITE
8
t
DRDY
P
t
EOM
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