EN25LF40
Read Data Bytes (READ) (03h)
The device is first selected by driving Chip Select (CS#) Low. The instruction code for the Read Data
Bytes (READ) instruction is followed by a 3-byte address (A23-A0), each bit being latched-in during the
rising edge of Serial Clock (CLK). Then the memory contents, at that address, is shifted out on Serial
Data Output (DO), each bit being shifted out, at a maximum frequency f , during the falling edge of
R
Serial Clock (CLK).
The instruction sequence is shown in Figure 9. The first byte addressed can be at any location. The
address is automatically incremented to the next higher address after each byte of data is shifted out.
The whole memory can, therefore, be read with a single Read Data Bytes (READ) instruction. When the
highest address is reached, the address counter rolls over to 000000h, allowing the read sequence to
be continued indefinitely.
The Read Data Bytes (READ) instruction is terminated by driving Chip Select (CS#) High. Chip Select
(CS#) can be driven High at any time during data output. Any Read Data Bytes (READ) instruction, while
an Erase, Program or Write cycle is in progress, is rejected without having any effects on the cycle that
is in progress.
Figure 9. Read Data Instruction Sequence Diagram
This Data Sheet may be revised by subsequent versions
or modifications due to changes in technical specifications.
©2004 Eon Silicon Solution, Inc.,
www.eonssi.com
14
Rev. G, Issue Date: 2010/05/31
EON [ EON SILICON SOLUTION INC. ]
