AT25QL321 datasheet(23/79 Pages) DIALOG

部件名	AT25QL321

功能描述	32-Mbit, 1.7V Minimum SPI Serial Flash Memory with Dual I/O, Quad I/O and QPI Support

PDF	79 Pages

Scroll/Zoom	100%

制造商	DIALOG [Dialog Semiconductor]

网页	http://www.dialog-semiconductor.com/

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23 / 79 page

AT25QL321

DS-25QL321–131C–5/2017

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

7.11 Fast Read Dual Output (3Bh)

By using two pins (IO0 and IO1, instead of just IO0), The Fast Read Dual Output instruction allows data to be transferred from

the AT25QL321 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 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 IO0 pin should be high‐impedance prior to the falling edge of the first data out clock.

Figure 7-14. Fast Read Dual Output instruction (SPI Mode)

AT25QL321 数据表(PDF) 23 Page - Dialog Semiconductor