X9221 Datasheet, PDF (6/14 Pages) Xicor Inc. – Dual E2POT™ Nonvolatile Digital Potentiometer

X9221
Table 1. Instruction Set
Instruction Format
Instruction
Read WCR
Write WCR
Read Data
Register
Write Data
Register
XFR Data Reg-
ister to WCR
I3 I2 I1 I0 0 P0
R1 Ro
Operation
1 0 0 1 0 1/0 N/A⁽⁷⁾ N/A Read the contents of the Wiper Counter
Register pointed to by P₀
1 0 1 0 0 1/0 N/A N/A Write new value to the Wiper Counter
Register pointed to by P₀
1 0 1 1 0 1/0 1/0 1/0 Read the contents of the Register
pointed to by P₀ and R₁–R₀
1 1 0 0 0 1/0 1/0 1/0 Write new value to the Register
pointed to by P₀ and R₁–R₀
1 1 0 1 0 1/0 1/0 1/0 Transfer the contents of the Register
pointed to by P₀ and R₁–R₀
to its associated WCR
XFR WCR to
Data Register
Global XFR Data
Register to WCR
1 1 1 0 0 1/0 1/0 1/0 Transfer the contents of the WCR
pointed to by P₀ to the Register
pointed to by R₁–R₀
0 0 0 1 N/A N/A 1/0 1/0 Transfer the contents of all four Data
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
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)
Figure 7. Acknowledge Response from Receiver
SCL FROM
MASTER
1
DATA
OUTPUT
FROM
TRANSMITTER
DATA
OUTPUT
FROM
RECEIVER
START
6
8
9
ACKNOWLEDGE
3079 ILL F14