at25df321a ATMEL Corporation, at25df321a Datasheet - Page 4

• Manufacturer Part Number: at25df321a
• Description: 32-megabit 2.7-volt Minimum Spi Serial Flash Memory
• Manufacturer: ATMEL Corporation

Table 2-1.
4
Symbol
HOLD
V
GND
Figure 2-1.
Figure 2-2.
CC
AT25DF321A [Preliminary]
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
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
whenever possible.
DEVICE POWER SUPPLY: The V
Operations at invalid V
attempted.
GROUND: The ground reference for the power supply. GND should be connected to the
system ground.
SO (SOI)
SO (SOI)
Pin Descriptions (Continued)
8-SOIC (Top View)
8-UDFN (Top View)
GND
GND
WP
WP
CS
CS
1
2
3
4
1
2
3
4
for additional details on the Hold operation.
CC
voltages may produce spurious results and should not be
8
7
6
5
8
7
6
5
VCC
HOLD
SCK
SI (SIO)
VCC
HOLD
SCK
SI (SIO)
CC
pin is used to supply the source voltage to the device.
CC
Asserted
State
Low
-
-
3686C–DFLASH–12/08
Power
Power
Type
Input