AT45DB021E datasheet(49/74 Pages) DIALOG

Part #	AT45DB021E

Description	2-Mbit DataFlash (with Extra 64 kbits) 1.65 V Minimum SPI Serial Flash Memory

PDF	74 Pages

Scroll/Zoom	100%

Manufacturer	DIALOG [Dialog Semiconductor]

Direct Link	http://www.dialog-semiconductor.com/

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49 / 74 page

AT45DB021E

DS-AT45DB021E—8789J—03/2021

System Considerations

The serial interface is controlled by the Serial Clock (SCK), Serial Input (SI), and Chip Select (CS) pins. These

signals must rise and fall monotonically and be free from noise. Excessive noise or ringing on these pins can be

misinterpreted as multiple edges and cause improper operation of the device. PCB traces must be kept to a

minimum distance or appropriately terminated to ensure proper operation. If necessary, decoupling capacitors can

be added on these pins to provide filtering against noise glitches.

As system complexity continues to increase, voltage regulation is becoming more important. A key element of any

voltage regulation scheme is its current sourcing capability. Like all Flash memories, the peak current for

DataFlash devices occurs during programming and erasing operations. The supply voltage regulator must be able

to supply this peak current requirement. An under specified regulator can cause current starvation. Besides

increasing system noise, current starvation during programming or erasing can lead to improper operation and

possible data corruption.

AT45DB021E Datasheet(PDF) 49 Page - Dialog Semiconductor