|
|
PDF AT25F2048 Data sheet ( Hoja de datos )
| Número de pieza | AT25F2048 | |
| Descripción | SPI Serial Memory 2M (262/144 x 8) | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AT25F2048 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
|
No Preview Available !
Features
• Serial Peripheral Interface (SPI) Compatible
• Supports SPI Modes 0 (0,0) and 3 (1,1)
• 20 MHz Clock Rate
• Byte Mode and 256-byte Page Mode for Program Operations
• Sector Architecture:
– Four Sectors with 64K Bytes Each
– 256 Pages per Sector
• Product Identification Mode
• Low-voltage Operation
– 2.7 (VCC = 2.7V to 3.6V)
• Sector Write Protection
– Protect 1/4, 1/2 or Entire Array
• Write Protect (WP) Pin and Write Disable Instructions for
both Hardware and Software Data Protection
• Self-timed Program Cycle (30 µs/Byte Typical)
• Self-timed Sector Erase Cycle (1 second/Sector Typical)
• Single Cycle Reprogramming (Erase and Program) for Status Register
• High Reliability
– Endurance: 10,000 Write Cycles Typical
• 8-lead JEDEC SOIC
Description
The AT25F2048 provides 2,097,152 bits of serial reprogrammable Flash memory
organized as 262,144 words of 8 bits each. The device is optimized for use in many
industrial and commercial applications where low-power and low-voltage operation
are essential. The AT25F2048 is available in a space-saving 8-lead JEDEC SOIC
package.
SPI Serial
Memory
2M (262,144 x 8)
AT25F2048
Preliminary
Pin Configurations
Pin Name
CS
Function
Chip Select
SCK
SI
SO
Serial Data Clock
Serial Data Input
Serial Data Output
GND
VCC
WP
HOLD
Ground
Power Supply
Write Protect
Suspends Serial Input
8-lead SOIC
CS
SO
WP
GND
1
2
3
4
8 VCC
7 HOLD
6 SCK
5 SI
Rev. 2455D–SEEPR–7/04
1
1 page  
Serial Interface
Description
AT25F2048
MASTER: The device that generates the serial clock.
SLAVE: Because the Serial Clock pin (SCK) is always an input, the AT25F2048 always
operates as a slave.
TRANSMITTER/RECEIVER: The AT25F2048 has separate pins designated for data
transmission (SO) and reception (SI).
MSB: The Most Significant Bit (MSB) is the first bit transmitted and received.
SERIAL OP-CODE: After the device is selected with CS going low, the first byte will be
received. This byte contains the op-code that defines the operations to be performed.
INVALID OP-CODE: If an invalid op-code is received, no data will be shifted into the
AT25F2048, and the serial output pin (SO) will remain in a high impedance state until
the falling edge of CS is detected again. This will reinitialize the serial communication.
CHIP SELECT: The AT25F2048 is selected when the CS pin is low. When the device is
not selected, data will not be accepted via the SI pin, and the serial output pin (SO) will
remain in a high impedance state.
HOLD: The HOLD pin is used in conjunction with the CS pin to select the AT25F2048.
When the device is selected and a serial sequence is underway, HOLD can be used to
pause the serial communication with the master device without resetting the serial
sequence. To pause, the HOLD pin must be brought low while the SCK pin is low. To
resume serial communication, the HOLD pin is brought high while the SCK pin is low
(SCK may still toggle during HOLD). Inputs to the SI pin will be ignored while the SO pin
is in the high impedance state.
WRITE PROTECT: The 25F2048 has a write lockout feature that can be activated by
asserting the write protect pin (WP). When the lockout feature is activated, locked-out
sectors will be READ only. The write protect pin will allow normal read/write operations
when held high. When the WP is brought low and WPEN bit is “1”, all write operations to
the status register are inhibited. WP going low while CS is still low will interrupt a write to
the status register. If the internal status register write cycle has already been initiated,
WP going low will have no effect on any write operation to the status register. The WP
pin function is blocked when the WPEN bit in the status register is “0”. This will allow the
user to install the AT25F2048 in a system with the WP pin tied to ground and still be
able to write to the status register. All WP pin functions are enabled when the WPEN bit
is set to “1”.
2455D–SEEPR–7/04
5
5 Page 
Timing Diagrams (for SPI Mode 0 (0, 0))
Synchronous Data Timing
CS
SCK
VIH
VIL
tCSS
VIH
VIL
VIH
SI
VIL
VOH
SO
VOL
HI-Z
tWH
tSU
VALID IN
tH
tWL
tV
WREN Timing
AT25F2048
tCS
tCSH
tHO tDIS
HI-Z
WRDI Timing
2455D–SEEPR–7/04
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet AT25F2048.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AT25F2048 | SPI Serial Memory 2M (262/144 x 8) | ATMEL Corporation |
| AT25F2048N | SPI Serial Memory 2M (262/144 x 8) | ATMEL Corporation |
| AT25F2048N-10SU-2.7 | SPI Serial Memory 2M (262/144 x 8) | ATMEL Corporation |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |