X9279UV14I datasheet(8/22 Pages) INTERSIL

Part #	X9279UV14I

Description	Single Supply/Low Power/256-Tap/2-Wire Bus

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Manufacturer	INTERSIL [Intersil Corporation]

Direct Link	http://www.intersil.com/cda/home

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8 / 22 page

8

FN8175.2

September 27, 2005

Register Selection (R0 to R3) Table

Register Bank Selection (Bank 0 to Bank 3) Table

Table 1. Identification Byte Format

Table 2. Instruction Byte Format

RB

RA

Register

Selection

Operations

0

Data Register Read and Write;

Wiper Counter Register

Operations

0

1

Data Register Read and Write;

Wiper Counter Register

Operations

1

0

2

Data Register Read and Write;

Wiper Counter Register

Operations

1

3

Data Register Read and Write;

Wiper Counter Register

Operations

P1

P0

Bank

Selection

Operations

0

Data Register Read and Write;

Wiper Counter Register

Operations

0

1

Data Register Read and

Write Only

1

0

2

Data Register Read and

Write Only

1

3

Data Register Read and

Write Only

ID3

ID2

ID1

ID0

0

A2

A1

A0

0101

(MSB)

(LSB)

Device Type

Identifier

Set to 0

for proper operation

Internal Slave

Address

I3

I2

I1

I0

RB

RA

P1

P0

(MSB)

(LSB)

Instruction Opcode

Register

Pot Selection (Bank Selection)

Set to P0 = 0 for potentiometer operations

Selection

P1 and P0 are used also for register Bank Selection

for 2-Wire Register Write and Read operations

Register Selection

Register Selected

RB

RA

DR0

0

DR1

0

1

DR2

1

0

DR3

1

X9279

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X9279UV14I Datasheet(PDF) 8 Page - Intersil Corporation

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