X9118_09 Datasheet, PDF (6/17 Pages) Intersil Corporation – Single Digitally-Controlled (XDCP™) Potentiometer

ID3
0
(MSB)
X9118
DEVICE TYPE
IDENTIFIES
ID2
ID1
1
0
TABLE 1. IDENTIFICATION BYTE FORMAT
SET TO 0
FOR PROPER
OPERATION
INTERNAL SLAVE
ADDRESS
ID0
0
A1
A0
1
0
A1
A0
READ OR
WRITE BIT
R/W
R/W
(LSB)
I2
(MSB)
INSTRUCTION
OPCODE
I1
TABLE 2. INSTRUCTION BYTE FORMAT
SET TO 0
FOR PROPER
OPERATION
REGISTER
SELECTION
I0
0
RB
RA
SET TO 0 FOR
PROPER OPERATION
0
0
(LSB)
REGISTER SELECTED
RB
RA
DR0
0
0
DR1
0
1
DR2
1
0
DR3
1
1
TABLE 3. INSTRUCTION SET
INSTRUCTION SET
INSTRUCTION
R/W I₂ I₁ I₀
Read Wiper Counter Register 1
100
0 RB RA 0
00 0 0
0
OPERATION
0 Read the contents of the Wiper Counter Register
Write Wiper Counter Register 0
10100
0
0 0 Write new value to the Wiper Counter Register
Read Data Register
1
1 0 1 0 1/0 1/0 0 0 Read the contents of the Data Register pointed to
RB-RA.
Write Data Register
0
1 1 0 0 1/0 1/0 0 0 Write new value to the Data Register pointed to
RB-RA.
XFR Data Register to Wiper
1
1 1 0 0 1/0 1/0 0 0 Transfer the contents of the Data Register pointed to
Counter Register
by RB-RA to the Wiper Counter Register
XFR Wiper Counter Register
0
1 1 1 0 1/0 1/0 0 0 Transfer the contents of the Wiper Counter Register
to Data Register
to the Data Register pointed to by RB-RA.
NOTE:
3. 1/∅ = data is one or zero.
6
FN8161.4
December 4, 2009