A25L016 Series
Read Data Bytes (READ)
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.
S
The device is first selected by driving Chip Select ( ) 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 (C).
Then the memory contents, at that address, is shifted out on
Serial Data Output (DO), each bit being shifted out, at a
maximum frequency fR, during the falling edge of Serial Clock
(C).
The Read Data Bytes (READ) instruction is terminated by
S
S
driving Chip Select ( ) High. Chip Select ( ) 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.
The instruction sequence is shown in Figure 8. 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,
Figure 8. Read Data Bytes (READ) Instruction Sequence and Data-Out Sequence
S
0
1
2
3
4
5
6
7
8
9 10
28 29 30 31
33 34 35 36 37 38 39
32
C
DIO
DO
Instruction
24-Bit Address
21
23
2
1
0
22
3
MSB
Data Out 2
Data Out 1
High Impedance
5
4
1
0
6
3
2
7
7
MSB
Note:. Address bits A23 to A21 are Don’t Care, for A25L016.
(March, 2012, Version 2.0)
15
AMIC Technology Corp.
AMICC [ AMIC TECHNOLOGY ]
