AT25DF321A-MH-T datasheet(4/58 Pages) ATMEL

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3686C–DFLASH–12/08

AT25DF321A [Preliminary]

HOLD

HOLD: The HOLD pin is used to temporarily pause serial communication without

deselecting or resetting the device. While the HOLD pin is asserted, transitions on the SCK

pin and data on the SI pin will be ignored, and the SO pin will be in a high-impedance state.

The CS pin must be asserted, and the SCK pin must be in the low state in order for a Hold

condition to start. A Hold condition pauses serial communication only and does not have an

effect on internally self-timed operations such as a program or erase cycle. Please refer to

“Hold” on page 46 for additional details on the Hold operation.

The HOLD pin is internally pulled-high and may be left floating if the Hold function will not be

used. However, it is recommended that the HOLD pin also be externally connected to VCC

whenever possible.

Low

Input

VCC

DEVICE POWER SUPPLY: The VCC pin is used to supply the source voltage to the device.

Operations at invalid V

CC voltages may produce spurious results and should not be

attempted.

-Power

GND

GROUND: The ground reference for the power supply. GND should be connected to the

system ground.

-Power

Figure 2-1.

8-SOIC (Top View)

Figure 2-2.

8-UDFN (Top View)

Table 2-1.

Pin Descriptions (Continued)

Symbol

Name and Function

Asserted

State

Type

SO (SOI)

GND

VCC

HOLD

SCK

SI (SIO)

SO (SOI)

GND

VCC

HOLD

SCK

SI (SIO)

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