X9111 Datasheet, PDF (8/21 Pages) Xicor Inc. – Single Digitally-Controlled Potentiometer

X9111 – Preliminary Information
Figure 3. Four-Byte Instruction Sequence (Write or Read for WCR or Data Registers)
CS
SCK
SI
0101 0
0
0 X X 0 0 X X XX XX
ID3 ID2 ID1 ID0 0 A1 A0 R/W I2 I1 I0 0 RB RA 0 0
Device ID
Internal Instruction Register
Address Opcode Address
WW W W WWW W W W
CC C C CCC C C C
RR R R RRR R R R
98 7 6 543 2 1 0
Wiper
Position
Figure 4. Four-Byte Instruction Sequence (Read Status Registers)
CS
SCK
SI
0101 0
1
0 X X 0 0 X X X X X XXX 0 0 0 0 0 00
ID3 ID2 ID1 ID0 0 A1 A0 R/W I2 I1 I0 0 RB RA 0 0
WIP
Device ID Internal Instruction Register
Address Opcode Address
Status
Bit
REV 1.1.15 5/9/03
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Characteristics subject to change without notice. 8 of 21