6 Device Commands and Addressing
The AT25512 is designed to interface directly with the synchronous Serial Peripheral Interface (SPI). The AT25512 utilizes an 8‑bit instruction register. The list of instructions and their operation codes are contained in Table 6-1. All instructions, addresses and data are transferred with the MSb first and start with a high‑to‑low CS transition.
| Instruction Name | Instruction Format | Operates On | Operation Description |
|---|---|---|---|
WREN | 0000 X110 | STATUS Register | Set Write Enable Latch (WEL) |
WRDI | 0000 X100 | STATUS Register | Reset Write Enable Latch (WEL) |
RDSR | 0000 X101 | STATUS Register | Read STATUS Register |
WRSR | 0000 X001 | STATUS Register | Write STATUS Register |
READ | 0000 X011 | Memory Array | Read from Memory Array |
WRITE | 0000 X010 | Memory Array | Write to Memory Array |