X9118_09 Datasheet, PDF (8/17 Pages) Intersil Corporation – Single Digitally-Controlled (XDCP™) Potentiometer

X9118
SCL
SDA
01 0 1
0
00
S ID3 ID2 ID1 ID0
T
A
R
DEVICE ID
T
0 A1 A0 R/W
INTERNAL
ADDRESS
A I2 I1 I0 0
C
K _INSTRUCTION
OPCODE
RB RA 0
REGISTER
ADDRESS
AS
CT
KO
P
FIGURE 3. TWO-BYTE INSTRUCTION SEQUENCE
SCL
SDA
0 101 0
0
0X X0 0
X X XX X X
S ^{ID3 ID2 ID1 ID0 0 A1 A0 R/W} A I2 ^{I1 I0 0 RB RA 0}
A
T
C
C
A
R
DEVICE ID
T
INTERNAL ^K INSTRUCTION REGISTER
ADDRESS
OPCODE
ADDRESS
K
WW ^A W W WWW W W WA S
CC C C C CCC C C CC T
RR K R R RRR R R RK O
98
7 6 543 2 1 0
P
WIPER OR DATA
POSITION
FIGURE 4. FOUR-BYTE INSTRUCTION SEQUENCE (WRITE OR READ FOR WCR OR DATA REGISTERS)
Instruction Format
Read Wiper Counter Register (WCR)
Device Type
S _Identifier
T
Device
Addresses
A
R _{0 1 0 1 0 A1 A0}
T
Instruction Register
Wiper Position
Wiper Position
S ^{Opcode Addresses} S ^{(Sent by Slave on SDA)} M ^{(Sent by Slave on SDA)} M S
A
A
WWA WWWWWWWWA ^T
C
K
1
0
0
0
0
0
0
0
C
KX
X
X
X
X
X
CCCCCCCCCC
RRKRRRRRRR
CCO
RKP
98
76543210
Write Wiper Counter Register (WCR)
Device Type
S _Identifier
T
Device
Addresses
A
R _{0 1 0 1 0 A1 A0}
T
Instruction Register
Wiper Position
Wiper Position
S ^{Opcode Addresses} S ^{(Sent by Master on SDA)} S ^{(Sent by Master on SDA)} S S
A
A
WW ^A WWWWWWWW ^{A T}
C
K
1
0
1
0
0
0
0
0
C
K
X
X
X
X
X
X
C
R
C
R
C
K
CCCC
RRRR
C
R
C
R
C
R
C
R
CO
KP
98
76543210
Read Data Register (DR)
Device Type
S _Identifier
T
Device
Addresses
A
R _{0 1 0 1 0 A1 A0}
T
Instruction
Register
Wiper Position
Wiper Position or Data
S ^Opcode
Addresses _S (Sent by Slave on SDA) _M (Sent by Slave on SDA) _{M S}
A
A
WW ^A WWWWWWWW ^{A T}
C
K
1
0
1
0
RB
RA
0
0
C
KX
X
X
X
X
X
C
R
C
R
C
K
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
R
C
K
O
P
98
76543210
8
FN8161.4
December 4, 2009