ISL59450IQZ Intersil, ISL59450IQZ Datasheet - Page 36

• Manufacturer Part Number: ISL59450IQZ
• Description: IC SWITCH VID CRSSPNT 128-MQFP
• Manufacturer: Intersil

Specifications of ISL59450IQZ

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Signals from
the Host
SDA Bus
Signals from
the ISL59450
A7
D7
1
1
A6
D6
0
0
A5
S
A
R
T
T
D5
ISL59450 Serial Bus
0
0
ISL59450 Serial Bus
a a a a a a a 0
Serial Bus
Address
(Repeat if desired)
START Command
START Command
STOP Command
36
A4
D4
0
0
A
C
K
AAAAAAAA
A3
D3
0
0
FIGURE 38. CONFIGURATION REGISTER READ
Register
Address
1
A2
1
D2
C
A
K
Address
Address
R
E
S
T
A
R
T
A1
a a a a a a a 1
D1
Serial Bus
Address
ISL59450
R/W
A0
R/W
D0
0
1
A
C
K
d d d d d d d d
Signals the ending of serial I/O
ISL59450 Device Select Address Write
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.
Signals the beginning of serial I/O
ISL59450 Register Data Read(s)
This is the data read from the ISL59450’s configuration register.
Note: The ISL59450’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.
ISL59450 Register Address Write
This sets the initial address of the ISL59450’s configuration
register for subsequent reading.
Ends the previous transaction and starts a new one
ISL59450 Serial Bus Address Read
This is the 7-bit address of the ISL59450 on the 2-wire bus. The
address is 0x85 if pin 92 is low, 0x87 if pin 92 is high. R/W = 1,
indicating next transaction(s) will be a read.
Read*
Data
C
A
K
O
S
T
P
* The data read step may be repeated to read
from the ISL59450’s Configuration Register
sequentially, beginning at the Register
Address written in the two previous steps.
February 14, 2008
FN7510.0