X9271TVI-2.7 datasheet(7/22 Pages) INTERSIL

Part #	X9271TVI-2.7

Description	Single Supply/Low Power/256-Tap/SPI Bus

Download	22 Pages

Scroll/Zoom	100%

Manufacturer	INTERSIL [Intersil Corporation]

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

Logo

7 / 22 page

7

FN8174.1

March 31, 2005

DEVICE DESCRIPTION

Instructions

IDENTIFICATION BYTE (ID AND A)

The first byte sent to the X9271 from the host,

following a CS going HIGH to LOW, is called the

Identification byte. The most significant four bits of the

slave address are a device type identifier. The ID[3:0]

bits is the device id for the X9271; this is fixed as

0101[B] (refer to Table 4).

The A1 - A0 bits in the ID byte is the internal slave

address. The physical device address is defined by the

state of the A1 - A0 input pins. The slave address is

externally specified by the user. The X9271 compares

the serial data stream with the address input state; a

successful compare of both address bits is required for

the X9271 to successfully continue the command

sequence. Only the device which slave address

matches the incoming device address sent by the

master executes the instruction. The A1 - A0 inputs

can be actively driven by CMOS input signals or tied to

VCC or VSS.

INSTRUCTION BYTE (I[3:0])

The next byte sent to the X9271 contains the

instruction and register pointer information. The three

most significant bits are used provide the instruction

opcode (I[3:0]). The RB and RA bits point to one of the

four Data Registers. P0 is the POT selection; since the

X9271 is single POT, the P0=0. The format is shown in

Table 5.

REGISTER BANK SELECTION (R1, R0, P1, P0)

There are 16 registers organized into four banks. Bank

0 is the default bank of registers. Only Bank 0 registers

can be used for data register to Wiper Counter

Register operations.

Banks 1, 2, and 3 are additional banks of registers (12

total) that can be used for SPI write and read

operations. The data registers in Banks 1, 2, and 3

cannot be used for direct read/write operations

between the Wiper Counter Register.

Register Selection (DR0 to DR3) Table

Register Bank Selection (Bank 0 to Bank 3) Table

Table 4. Identification 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

A1

A0

0101

(MSB)

(LSB)

Device Type

Identifier

Set to 0

for proper operation

Internal

Slave Address

X9271

Similar Part No. - X9271TVI-2.7

Manufacturer	Part #	Datasheet	Description
Xicor Inc.	X9271TVI-2.7	403Kb / 23P	Single Digitally-Controlled (XDCP) Potentiometer

More results

Similar Description - X9271TVI-2.7

Manufacturer	Part #	Datasheet	Description
Intersil Corporation	X9261	393Kb / 21P	Single Supply/Low Power/256-Tap/SPI Bus
Intersil Corporation	X9251	354Kb / 22P	Single Supply/Low Power/256-Tap/SPI Bus
Renesas Technology Corp	X9261	442Kb / 20P	Single Supply/Low Power/256-Tap/SPI Bus October 12, 2006
Intersil Corporation	X9260	407Kb / 25P	Dual Supply/Low Power/256-Tap/SPI bus
Renesas Technology Corp	X9260	434Kb / 23P	Dual Supply/Low Power/256-Tap/SPI bus August 29, 2006
Intersil Corporation	X9251US24Z	438Kb / 21P	Single Supply/Low Power/256-Tap/SPI Bus, Quad Digitally-Controlled Potentiometer December 3, 2014
Renesas Technology Corp	X9271	791Kb / 19P	Single Supply/Low Power/256-Tap/SPI Bus Single, Digitally Controlled (XDCP?? Potentiometer
Intersil Corporation	X9111	359Kb / 18P	Single Supply/Low Power/1024-Tap/SPI Bus
Intersil Corporation	X9259	364Kb / 21P	Single Supply/Low Power/256-Tap/2-Wire bus
Renesas Technology Corp	X9251	849Kb / 21P	Single Supply/Low Power/256-Tap/SPI Bus, Quad Digitally-Controlled (XDCP??Potentiometer

More results

X9271TVI-2.7 Datasheet(PDF) 7 Page - Intersil Corporation

X9271TVI-2.7 Datasheet(HTML) 7 Page - Intersil Corporation

Similar Part No. - X9271TVI-2.7

Similar Description - X9271TVI-2.7

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

Datasheet Download

Link URL