X9251UV24Z-2.7 datasheet(8/22 Pages) INTERSIL

Part #	X9251UV24Z-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

8 / 22 page

8

FN8166.2

September 14, 2005

Instructions

Four of the nine instructions are three bytes in length.

These instructions are:

– Read Wiper Counter Register – read the current

wiper position of the selected potentiometer,

– Write Wiper Counter Register – change current

wiper position of the selected potentiometer,

– Read Data Register – read the contents of the

selected Data Register,

– Write Data Register – write a new value to the

selected Data Register,

– Read Status – this command returns the contents

of the WIP bit which indicates if the internal write

cycle is in progress.

The basic sequence of the three byte instructions is

illustrated in Figure 3. These three-byte instructions

exchange data between the WCR and one of the Data

Registers. A transfer from a Data Register to a WCR is

essentially a write to a static RAM, with the static RAM

controlling the wiper position. The response of the

wiper to this action is delayed by tWRL. A transfer from

the WCR (current wiper position), to a Data Register is

a write to non-volatile memory and takes a minimum of

tWR to complete. The transfer can occur between one

of the four potentiometer’s WCR, and one of its

associated registers, DRs; or it may occur globally,

where the transfer occurs between all potentiometers

and one associated register. The Read Status

Register instruction is the only unique format (See

Figure 5).

Four instructions require a two-byte sequence to

complete. These instructions transfer data between

the host and the X9251; either between the host and

one of the data registers or directly between the host

and the Wiper Counter Register. These instructions

are:

– XFR Data Register to Wiper Counter Register –

This transfers the contents of one specified Data

Register to the associated Wiper Counter Register.

– XFR Wiper Counter Register to Data Register –

This transfers the contents of the specified Wiper

Counter Register to the specified associated Data

Register.

– Global XFR Data Register to Wiper Counter

Register – This transfers the contents of all speci-

fied Data Registers to the associated Wiper Counter

Registers.

– Global XFR Wiper Counter Register to Data

Register – This transfers the contents of all Wiper

Counter Registers to the specified associated Data

Registers.

INCREMENT/DECREMENT COMMAND

The final command is Increment/Decrement (See

Figures 6 and 7). The Increment/Decrement command

is different from the other commands. Once the

command is issued and the X9251 has responded

with an Acknowledge, the master can clock the

selected wiper up and/or down in one segment steps;

thereby, providing a fine tuning capability to the host.

For each SCK clock pulse (tHIGH) while SI is HIGH,

the selected wiper moves one wiper position towards

the RH terminal. Similarly, for each SCK clock pulse

while SI is LOW, the selected wiper moves one wiper

position towards the RL terminal. A detailed illustration

of the sequence and timing for this operation are

shown. See Instruction format for more details.

X9251

Similar Part No. - X9251UV24Z-2.7

Manufacturer	Part #	Datasheet	Description
Intersil Corporation	X9251UV24Z-2.7	331Kb / 20P	Quad Digitally-Controlled (XDCP?? Potentiometer
Intersil Corporation	X9251UV24Z-2.7	438Kb / 21P	Single Supply/Low Power/256-Tap/SPI Bus, Quad Digitally-Controlled Potentiometer December 3, 2014
Renesas Technology Corp	X9251UV24Z-2.7	849Kb / 21P	Single Supply/Low Power/256-Tap/SPI Bus, Quad Digitally-Controlled (XDCP??Potentiometer

More results

Similar Description - X9251UV24Z-2.7

Manufacturer	Part #	Datasheet	Description
Intersil Corporation	X9261	393Kb / 21P	Single Supply/Low Power/256-Tap/SPI Bus
Intersil Corporation	X9271	373Kb / 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

X9251UV24Z-2.7 Datasheet(PDF) 8 Page - Intersil Corporation

X9251UV24Z-2.7 Datasheet(HTML) 8 Page - Intersil Corporation

Similar Part No. - X9251UV24Z-2.7

Similar Description - X9251UV24Z-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