ISL22316 Datasheet, PDF (12/15 Pages) Intersil Corporation – Single Digitally Controlled Potentiometer XDCP

ISL22316
SCL
SDA
START
DATA
DATA
DATA
STABLE CHANGE STABLE
STOP
FIGURE 16. VALID DATA CHANGES, START AND STOP CONDITIONS
SCL FROM
MASTER
1
SDA OUTPUT FROM
TRANSMITTER
8
9
HIGH IMPEDANCE
SDA OUTPUT FROM
RECEIVER
HIGH IMPEDANCE
START
ACK
FIGURE 17. ACKNOWLEDGE RESPONSE FROM RECEIVER
SIGNALS FROM
THE MASTER
WRITE
S
T
A _{IDENTIFICATION}
R
BYTE
T
ADDRESS
BYTE
S
DATA
T
BYTE
O
P
SIGNAL AT SDA
0 1 0 1 0 A1 A0 0 0 0 0 0
SIGNALS FROM
THE SLAVE
A
A
A
C
C
C
K
K
K
FIGURE 18. BYTE WRITE SEQUENCE
SIGNALS
FROM THE
MASTER
S
T
A IDENTIFICATION
R
BYTE WITH
T
R/W = 0
ADDRESS
BYTE
S
T
A IDENTIFICATION
R _{BYTE WITH}
T
R/W = 1
A
A
C
C
K
K
S
AT
CO
KP
SIGNAL AT SDA 0 1 0 1 0A1 A0 0 0 0 0 0
A
SIGNALS FROM
C
THE SLAVE
K
0 1 0 1 0 A1 A0 1
A
A
C
C _{FIRST READ}
K
K _{DATA BYTE}
FIGURE 19. READ SEQUENCE
LAST READ
DATA BYTE
12
FN6186.2
September 1, 2009