ISL54105 Datasheet, PDF (15/16 Pages) Intersil Corporation – TMDS Regenerator

ISL54105
START Command
ISL54105 Serial Bus
R/W
ADDR6 ADDR5 ADDR4 ADDR3 ADDR2 ADDR1 ADDR0 0
A7
A6
A5
A4
A3
A2
A1
A0
START Command
ISL54105 Serial Bus
R/W
ADDR6 ADDR5 ADDR4 ADDR3 ADDR2 ADDR1 ADDR0 1
Signals the beginning of serial I/O
ISL54105 Device Select Address Write
The first 7 bits of the first byte select the ISL54105 on the 2-wire
bus at the address set by the ADDR[6:0} pins. R/W = 0,
indicating that the next transaction will be a write.
ISL54105 Register Address Write
This sets the initial address of the ISL54105’s configuration
register for subsequent reading.
Ends the previous transaction and starts a new one
ISL54105 Serial Bus Address Write
This is the same 7-bit address that was sent previously, however
the R/W bit is now a 1, indicating that the next transaction(s) will
be a read.
D7
D6
Signals from
the Host
SDA Bus
Signals from
the ISL54105
ISL54105 Register Data Read(s)
D5
D4
D3
D2
D1
D0 _{This is the data read from the ISL54105’s configuration register.}
(Repeat if desired)
Note: The ISL54105’s Configuration Register’s address pointer
auto increments after each data read: repeat this step to read
multiple sequential bytes of data from the Configuration Register.
STOP Command
Signals the ending of serial I/O
R
S
T _{Serial Bus}
A
R
Address
T
Register
Address
E
S
T _{Serial Bus}
A
R
Address
T
Data
Read*
S
T
A
O
P
C
a a a a a a a 0 AAAAAAAA a a a a a a a 1
K
A
A
C
C
A
C
d
d
d
d
d
d
d
d
K
K
K
* The data read step may be repeated to read
from the ISL54105’s Configuration Register
sequentially, beginning at the Register
Address written in the two steps previous.
FIGURE 18. CONFIGURATION REGISTER READ
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15
FN6723.0
June 11, 2008