at25128-10si-2.7 ATMEL Corporation, at25128-10si-2.7 Datasheet - Page 6

• Manufacturer Part Number: at25128-10si-2.7
• Description: Spi Serial Eeproms 128k 16,384 X 8 256k 32,768 X 8
• Manufacturer: ATMEL Corporation

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