x9268us24c7979 Intersil Corporation, x9268us24c7979 Datasheet - Page 14

• Manufacturer Part Number: x9268us24c7979
• Description: Dual Digitally Controlled Xdcp? Potentiometers
• Manufacturer: Intersil Corporation

Global XFR Wiper Counter Register (WCR) to Data Register (DR)
Transfer Wiper Counter Register (WCR) to Data Register (DR)
Transfer Data Register (DR) to Wiper Counter Register (WCR)
Increment/Decrement Wiper Counter Register (WCR)
Notes: (1) “MACK”/”SACK”: stands for the acknowledge sent by the master/slave.
R
R
S
T
A
T
S
T
A
R
T
S
T
A
T
S
A
R
T
T
Device Type
0
0
0 1 0 1 A3 A2 A1 A0
0
Device Type
Device Type
Device Type
Identifier
Identifier
Identifier
(2) “A3 ~ A0”: stands for the device addresses sent by the master.
(3) “X”: indicates that it is a “0” for testing purpose but physically it is a “don’t care” condition.
(4) “I”: stands for the increment operation, SDA held high during active SCL phase (high).
(5) “D”: stands for the decrement operation, SDA held low during active SCL phase (high).
Identifier
1
1
1
0
0
0
1 A3 A2 A1 A0
1 A3 A2 A1 A0
1 A3 A2 A1 A0
Addresses
Addresses
Addresses
Device
Addresses
Device
Device
Device
14
S
A
C
K
C
S
A
K
S
A
C
K
S
A
C
K
0 0 1 0 0 0
Instruction
1 0 0 0 RB RA 0 0
Instruction
1 1 1 0 RB RA
Opcode
Instruction
1 1 0 1 RB RA
Instruction
Opcode
Opcode
Opcode
Addresses
Addresses
DR/WCR
DR/WCR
Addresses
Addresses
X9268
DR/WCR
DR/WCR
0
0
0
P0
P0
P0
S
A
C
K
S
A
C
K
S
A
C
K
C
S
A
K
O
S
T
P
I/D I/D .
O
S
T
P
O
S
P
T
(Sent by Master on SDA)
HIGH-VOLTAGE
Increment/Decrement
WRITE CYCLE
HIGH-VOLTAGE
WRITE CYCLE
.
.
. I/D I/D
O
S
P
T
August 29, 2006
FN8172.4