AT25QL641 datasheet(25/77 Pages) DIALOG

부품명	AT25QL641

상세설명	64-Mbit, 1.7V Minimum SPI Serial Flash Memory with Dual I/O, Quad I/O and QPI Support

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AT25QL641

DS-25QL641–130E–10/2018

Figure 7-12. Fast Read instruction (QPI Mode, 80 MHz)

Figure 7-13. Fast Read instruction (QPI Mode, 104 MHz)

7.11

Fast Read Dual Output (3Bh)

By using two pins (I/O0 and I/O1, instead of just I/O0), The Fast Read Dual Output instruction allows data to be transferred

from the AT25QL641 at twice the rate of standard SPI devices. The Fast Read Dual Output instruction is ideal for quickly

downloading code from Flash to RAM upon power-up or for application that cache code-segments to RAM for execution.

The Fast Read Dual Output instruction can operate at the highest possible frequency of FR (see Table 8-7, AC Electrical

Characteristics). After the 24-bit address, this is accomplished by adding eight “dummy” clocks as shown in Figure 7-14. The

dummy clocks allow the internal circuits additional time for setting up the initial address. During the dummy clocks, the data

value on the SO pin is a “don’t care”. However, the I/O0 pin should be high-impedance prior to the falling edge of the first data

out clock.

AT25QL641 데이터시트(PDF) 25 Page - Dialog Semiconductor