ISL22349_09 Datasheet, PDF (11/13 Pages) Intersil Corporation – Quad Digitally Controlled Potentiometers

ISL22349
SCL FROM
MASTER
1
SDA OUTPUT FROM
TRANSMITTER
8
9
HIGH IMPEDANCE
SDA OUTPUT FROM
RECEIVER
HIGH IMPEDANCE
START
ACK
FIGURE 13. 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
1 0 1 0 A2 A1 A0 0 0 0 0 0
SIGNALS FROM
THE SLAVE
A
A
A
C
C
C
K
K
K
FIGURE 14. BYTE WRITE SEQUENCE
S
S
SIGNALS T
T
FROM THE A IDENTIFICATION
A IDENTIFICATION
A
MASTER R
T
BYTE WITH
R/W = 0
ADDRESS
BYTE
R _{BYTE WITH}
T
R/W = 1
C
K
SIGNAL AT SDA 1 0 1 0 A2 A1 A0 0 0 0 0 0
A
SIGNALS FROM
C
THE SLAVE
K
1 0 1 0 A2 A1 A0 1
A
A
C
C _{FIRST READ}
K
K _{DATA BYTE}
FIGURE 15. READ SEQUENCE
A
C
K
S
AT
CO
KP
LAST READ
DATA BYTE
11
FN6331.3
May 28, 2009