AT25DF321A Datasheet, PDF (4/58 Pages) ATMEL Corporation – 32-Megabit 2.7-volt Minimum SPI Serial Flash Memory

Table 2-1. Pin Descriptions (Continued)
Symbol
HOLD
V_CC
GND
Name and Function
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 V_CC
whenever possible.
DEVICE POWER SUPPLY: The V_CC 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.
GROUND: The ground reference for the power supply. GND should be connected to the
system ground.
Asserted
State
Low
-
-
Type
Input
Power
Power
Figure 2-1. 8-SOIC (Top View)
CS 1
SO (SOI) 2
WP 3
GND 4
8 VCC
7 HOLD
6 SCK
5 SI (SIO)
Figure 2-2. 8-UDFN (Top View)
CS 1
SO (SOI) 2
WP 3
GND 4
8 VCC
7 HOLD
6 SCK
5 SI (SIO)
4 AT25DF321A [Preliminary]
3686C–DFLASH–12/08