ISL59450 Datasheet, PDF (35/37 Pages) Intersil Corporation – Multiformat Video Crosspoint with Integrated Sync Separator

ISL59450
START Command
Signals the beginning of serial I/O
ISL59450 Serial Address
R/W
ISL59450 Device Select Address Write
1
0
0
0
0
1
Addr
0
The first 7 bits of the first byte select the ISL59450 on the 2-wire
bus at the address set by the Address pin. R/W = 0, indicating
the next transaction will be a write.
ISL59450 Register Address Write
A7
A6
A5
A4
A3
A2
A1
A0 _{This is the address of the ISL59450’s configuration register that}
the following byte will be written to.
ISL59450 Register Data Write(s)
D7
D6
D5
D4
D3
D2
D1
D0 _{This is the data to be written to the ISL59450’s configuration register.}
(Repeat if desired)
Note: The ISL59450’s Configuration Register’s address pointer auto
increments after each data write. Repeat this step to write multiple
sequential bytes of data to the Configuration Register.
Signals from
the Host
SDA Bus
Signals from
the ISL59450
STOP Command
Signals the ending of serial I/O
S
T _{Serial Bus}
A
R
Address
T
Register
Address
Data
Write*
S
T ^{* The data write step may be repeated to write to the}
O ISL59450’s Configuration Register sequentially, beginning at
P _{the Register Address written in the previous step.}
a a a a a a a 0 AAAAAAAA d d d d d d d d
A
A
A
C
C
C
K
K
K
FIGURE 37. CONFIGURATION REGISTER WRITE
35
FN7510.0
February 14, 2008