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X9221 Datasheet(PDF) 6 Page - Xicor Inc.

Part No. X9221
Description  Dual E2POT™ Nonvolatile Digital Potentiometer
Download  14 Pages
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Maker  XICOR [Xicor Inc.]
Homepage  http://www.xicor.com
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X9221 Datasheet(HTML) 6 Page - Xicor Inc.

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6
X9221
Figure 7. Acknowledge Response from Receiver
Instruction Format
Instruction
I3
I2
I1
I0
0P0
R1
Ro
Operation
Read WCR
1
0
0
1
0
1/0
N/A(7)
N/A
Read the contents of the Wiper Counter
Register pointed to by P0
Write WCR
1
0
1
0
0
1/0
N/A
N/A
Write new value to the Wiper Counter
Register pointed to by P0
Read Data
1
0
1
1
0
1/0
1/0
1/0
Read the contents of the Register
Register
pointed to by P0 and R1–R0
Write Data
1
1
0
0
0
1/0
1/0
1/0
Write new value to the Register
Register
pointed to by P0 and R1–R0
XFR Data Reg-
1
1
0
1
0
1/0
1/0
1/0
Transfer the contents of the Register
ister to WCR
pointed to by P0 and R1–R0
to its associated WCR
XFR WCR to
1
1
1
0
0
1/0
1/0
1/0
Transfer the contents of the WCR
Data Register
pointed to by P0 to the Register
pointed to by R1–R0
Global XFR Data
0
0
0
1
N/A
N/A
1/0
1/0
Transfer the contents of all four Data
Register to WCR
Registers pointed to by R1–R0 to their
respective WCR
Global XFR WCR
1
0
0
0
N/A
N/A
1/0
1/0
Transfer the contents of all WCRs
to Data Register
to their respective data Registers
pointed to by R1–R0
Increment/Decre-
0
0
1
0
0
1/0
N/A
N/A
Enable Increment/decrement of the
ment Wiper
WCR pointed to by P0
3079 PGM T11.1
Table 1. Instruction Set
Notes: (7) N/A = Not applicable or don’t care; that is, a data register is not involved in the operation and need not be addressed (typical)
3079 ILL F14
SCL FROM
MASTER
DATA
OUTPUT
FROM
TRANSMITTER
1
89
DATA
OUTPUT
FROM
RECEIVER
START
ACKNOWLEDGE


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