PI2EQX5804CNJE Datasheet, PDF (16/23 Pages) Pericom Semiconductor Corporation – 5.0Gbps 4-Lane PCIe® 2.0 ReDriver™ with Equalization & Emphasis

I²C Data Transfer
1. Read sequence
PI2EQX5804C
PI2EQX5804C
ACK _{DATA OUT} ACK
PI2EQX5804C
5.0Gbps 4-Lane PCIe® 2.0 ReDriver™ with
Equalization & Emphasis
ACK DATA OUT N NO ACK
I²C Master
DEV SEL ^{R / W}
2. Write sequence
PI2EQX5804C
ACK
ACK
ACK
ACK
ACK
I²C Master
DEV SEL ^{R / W} DUMMY BYTE
DATA IN 1
3. Combined sequence
PI2EQX5804C
ACK DUMMY BYTE ACK
ACK DATA OUT 1 ACK
DATA IN N
ACK ^{DATA OUT N} NO
I²C Master
DEV SEL ^{R / W}
DEV SEL ^{R / W}
09-0001
Notes:
1. only block read and block write from the lowest byte
are supported for this application.
2. for some I2C application, an offset address byte will be
presented at the second byte in write command, which
is called dummy byte here and will be simply ignored in
this application for correct interoperation.
16
PS8926B
06/08/09