A25L80P
Read Data Bytes (READ)
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.
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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 (Q), 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
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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, therefore, be read with a
Figure 8. Read Data Bytes (READ) Instruction Sequence and Data-Out Sequence
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6
0
1
2
3
4
5
7
8
9 10
28 29 30 31 32 33 34 35 36 37 38 39
C
D
Q
Instruction
24-Bit Address
23
21
2
1
0
22
3
MSB
Data Out 2
Data Out 1
High Impedance
5
4
1
0
6
3
2
7
7
MSB
PRELIMINARY (May 2005, Version 0.0)
13
AMIC Technology Corp.
AMICC [ AMIC TECHNOLOGY ]
