Reading data from the AT25080B/AT25160B via the SO pin requires the
following sequence. After the CS line is pulled low to select a
device, the READ (03h) instruction is transmitted via the SI line,
followed by the 16‑bit address to be read. Refer to Table 7-1 for the AT25080B/AT25160B address
bits.
Table 7-1. AT25080B/AT25160B Address Bits
Address
AT25080B
AT25160B
AN
A9–A0
A10–A0
Don’t Care Bits
A15–A10
A15–A11
Upon completion of the 16‑bit address, any data present on the SI line will be ignored.
The data (D7‑D0) at the specified address are then shifted out onto the SO line. If only
one byte is to be read, the CS line should be driven high after
the data are output. The read sequence can continue because the byte address is
automatically incremented, allowing data to continue shifting out. When the
highest‑order address is reached, the address counter rolls over to the lowest‑order
address, allowing the entire memory array to be read in one continuous read cycle
regardless of the starting address.Figure 7-1. Read Waveform
DS20006244C
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