X9260TS24-27 datasheet(4/25 Pages) INTERSIL

Part #	X9260TS24-27

Description	Dual Supply/Low Power/256-Tap/SPI bus

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Manufacturer	INTERSIL [Intersil Corporation]

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

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4

FN8170.0

February 28, 2005

PIN DESCRIPTIONS

Bus Interface Pins

SERIAL OUTPUT (SO)

SO is a serial data output pin. During a read cycle,

data is shifted out on this pin. Data is clocked out by

the falling edge of the serial clock.

SERIAL INPUT

SI is the serial data input pin. All opcodes, byte

addresses and data to be written to the pots and pot

registers are input on this pin. Data is latched by the

rising edge of the serial clock.

SERIAL CLOCK (SCK)

The SCK input is used to clock data into and out of the

X9260.

HOLD (HOLD)

HOLD is used in conjunction with the CS pin to select

the device. Once the part is selected and a serial

sequence is underway, HOLD may be used to pause

the serial communication with the controller without

resetting the serial sequence. To pause, HOLD must

be brought LOW while SCK is LOW. To resume

communication, HOLD is brought HIGH, again while

SCK is LOW. If the pause feature is not used, HOLD

should be held HIGH at all times.

DEVICE ADDRESS (A1 - A0)

The address inputs are used to set the 4-bit slave

address. A match in the slave address serial data

stream must be made with the address input in order

to initiate communication with the X9260.

CHIP SELECT (CS)

When CS is HIGH, the X9260 is deselected and the

SO pin is at high impedance, and (unless an internal

write cycle is underway) the device will be in the

standby state. CS LOW enables the X9260, placing it

in the active power mode. It should be noted that after

a power-up, a HIGH to LOW transition on CS is

required prior to the start of any operation.

Potentiometer Pins

RH, RL

The RH and RL pins are equivalent to the terminal

connections on a mechanical potentiometer. Since

there are 2 potentiometers, there are 2 sets of RH and

RL such that RH0 and RL0 are the terminals of POT 0

and so on.

RW

The wiper pin are equivalent to the wiper terminal of a

mechanical

potentiometer.

Since

there

are

2

potentiometers, there are 2 sets of RW such that RW0

is the terminals of POT 0 and so on.

Supply Pins

SYSTEM SUPPLY VOLTAGE (VCC) AND SUPPLY

GROUND (VSS)

The VCC pin is the system supply voltage. The VSS

pin is the system ground.

Analog Supply Voltages (V+ and V

-)

These supplies are the analog voltage supplies for the

potentiometer. The V+ supply is tied to the wiper

switches while the V- supply is used to bias the

switches and the internal P+ substrate of the

integrated circuit. Both of these supplies set the

voltage limits of the potentiometer.

Other Pins

NO CONNECT

No connect pins should be left floating. This pins are

used for Intersil manufacturing and testing purposes.

HARDWARE WRITE PROTECT INPUT (WP)

The WP pin when LOW prevents nonvolatile writes to

the Data Registers.

X9260

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X9260TS24-27 Datasheet(PDF) 4 Page - Intersil Corporation

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