A25L040O-F AMIC, A25L040O-F Datasheet - Page 17

• Manufacturer Part Number: A25L040O-F
• Description: 58T1309
• Manufacturer: AMIC

Specifications of A25L040O-F

• Memory Type: Flash
• Memory Size: 4Mbit
• Memory Configuration: 4M X 1
• Interface Type: Serial, SPI
• Clock Frequency: 100MHz
• Supply Voltage Range: 2.7V To 3.6V
• Memory Case Style: SOIC
• No. Of Pins: 8
• Rohs Compliant: Yes

Fast Read Dual Input-Output (BBh)
The Fast Read Dual Input-Output (BBh) instruction is similar
to the Fast_Read (0Bh) instruction except the data is input
and output on two pins, DO and DIO, instead of just DO. This
allows data to be transferred from the A25L040 at twice the
rate of standard SPI devices.
Similar to the Fast Read instruction, the Fast Read Dual
Output instruction can operate at the highest possible
frequency
Figure 11. FAST_READ_DUAL_INPUT-OUTPUT Instruction Sequence and Data-Out Sequence
(October, 2010, Version 1.2)
of
DIO
DIO
DO
DO
S
S
C
C
f
C
(See
Note: Address bits A23 to A19 are Don’t Care, for A25L040.
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
3 2 1 0
High Impedance
Dummy
0 1
Byte
AC
Characteristics).
2 3 4
Instruction
7 5 3 1
6 4 2 0
MSB
DIO switches from input to output
Data Out 1
5 6
7
MSB
6 4 2 0 6 4 2 0 6 4 2 0 6 4 2 0
This
7 5 3 1 7 5 3
MSB
22 20 18
23
8
Data Out 2
21 19
9
is
24-Bit Address
10
16
accomplished by adding four “dummy” clocks after the 24-bit
address as shown in figure 11. The dummy clocks allow the
device’s internal circuits additional time for setting up the
initial address. The input data during the dummy clocks is
“don’t care”. However, the DIO and DO pins should be
high-impedance prior to the falling edge of the first data out
clock.
7
6 4 2
16 17 18 19
Data Out 3
5 3
1
0
0
1
MSB
7 5 3 1 7 5 3 1
Data Out 4
AMIC Technology Corp.
Data Out 5
A25L040 Series
MSB
7