X9221 查看數據表（PDF） - Xicor -> Intersil

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X9221

Dual E2POT™ Nonvolatile Digital Potentiometer

Xicor -> Intersil 

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

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