AT25256W-10SC Atmel, AT25256W-10SC Datasheet - Page 6

• Manufacturer Part Number: AT25256W-10SC
• Description: IC EEPROM 256KBIT 3MHZ 8SOIC
• Manufacturer: Atmel

Specifications of AT25256W-10SC

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 256K (32K x 8)
• Speed: 3MHz
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Figure 2. SPI Serial Interface
Functional
Description
6
AT25128/256
The AT25128/256 is designed to interface directly with the synchronous serial periph-
eral interface (SPI) of the 6800 type series of microcontrollers.
The AT25128/256 utilizes an 8-bit instruction register. The list of instructions and their
operation codes are contained in Table 5. All instructions, addresses, and data are
transferred with the MSB first and start with a high-to-low CS transition.
Table 5. Instruction Set for the AT25128/256
Instruction Name
WREN
WRDI
RDSR
WRSR
READ
WRITE
Instruction Format
0000 X110
0000 X100
0000 X101
0000 X001
0000 X011
0000 X010
AT25128/256
Operation
Set Write Enable Latch
Reset Write Enable Latch
Read Status Register
Write Status Register
Read Data from Memory Array
Write Data to Memory Array
0872O–SEEPR–03/05