A25L16P Просмотр технического описания (PDF) - AMIC Technology

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A25L16P

16 Mbit, Low Voltage, Serial Flash Memory With 85MHz SPI Bus Interface

AMIC Technology 

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 A25L16P 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 of fC (See AC Characteristics). This is

A25L16P Series

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.

Figure 11. FAST_READ_DUAL_INPUT-OUTPUT Instruction Sequence and Data-Out Sequence

Note: Address bits A23 to A21 are Don’t Care.

PRELIMINARY (April, 2007, Version 0.6)

17

AMIC Technology Corp.

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