FM25V20-DGTR datasheet(4/17 Pages) RAMTRON

Numer części	FM25V20-DGTR

Szczegółowy opis	2Mb Serial 3V F-RAM Memory

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Producent	RAMTRON [Ramtron International Corporation]

Strona internetowa	http://www.ramtron.com

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4 / 17 page

FM25V20 – 2Mb SPI F-RAM

Rev. 3.0

August 2012

Page 4 of 17

System Hookup

The SPI interface uses a total of four pins: clock,

data-in, data-out, and chip select. A typical system

configuration uses one or more FM25V20 devices

with a microcontroller that has a dedicated SPI port,

as Figure 3 illustrates. Note that the clock, data-in,

and data-out pins are common among all devices.

The Chip Select and Hold pins must be driven

separately for each FM25V20 device.

For a microcontroller that has no dedicated SPI bus, a

general purpose port may be used. To reduce

hardware resources on the controller, it is possible to

connect the two data pins together and tie off the

Hold pin. Figure 4 shows a configuration that uses

only three pins.

SPI

Microcontroller

FM25V20

Q

D

C

S

HOLD

FM25V20

Q

D

C

S

HOLD

SCK

MOSI

MISO

SS1

SS2

HOLD1

HOLD2

MOSI : Master Out Slave In

MISO : Master In Slave Out

SS : Slave Select

Figure 3. 4Mbit (512KB) System Configuration with SPI port

Microcontroller

FM25V20

Q

D

C

S

HOLD

P1.0

P1.1

P1.2

VDD

Figure 4. System Configuration without SPI port

Podobny numer części - FM25V20-DGTR

Producent	Numer części	Arkusz danych	Szczegółowy opis
Cypress Semiconductor	FM25V20-DGTR	531Kb / 17P	2Mb Serial 3V F-RAM Memory

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Podobny opis - FM25V20-DGTR

Producent	Numer części	Arkusz danych	Szczegółowy opis
Cypress Semiconductor	FM25H20	438Kb / 16P	2Mb Serial 3V F-RAM Memory
Cypress Semiconductor	FM25V20	531Kb / 17P	2Mb Serial 3V F-RAM Memory
Ramtron International C...	FM25H20	342Kb / 15P	2Mb Serial 3V F-RAM Memory
	FM25V02	343Kb / 17P	256Kb Serial 3V F-RAM Memory
	FM25V10	333Kb / 16P	1Mb Serial 3V F-RAM Memory
Cypress Semiconductor	FM24CL64B	354Kb / 13P	64Kb Serial 3V F-RAM Memory
	FM24V01	378Kb / 14P	128Kb Serial 3V F-RAM Memory
	FM24V02	401Kb / 16P	256Kb Serial 3V F-RAM Memory
	FM25L16B	473Kb / 14P	16Kb Serial 3V F-RAM Memory
	FM24CL16B	364Kb / 14P	16Kb Serial 3V F-RAM Memory

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FM25V20-DGTR Arkusz danych(PDF) 4 Page - Ramtron International Corporation

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