AT45DB081B-CU ATMEL [ATMEL Corporation], AT45DB081B-CU Datasheet - Page 14
![no-image](/images/no-image-200.jpg)
AT45DB081B-CU
Manufacturer Part Number
AT45DB081B-CU
Description
8-megabit 2.5-volt Only or 2.7-volt Only DataFlash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT45DB081B-CU.pdf
(33 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT45DB081B-CU
Manufacturer:
ATMEL
Quantity:
1 200
Input Test Waveforms and Measurement Levels
Output Test Load
AC Waveforms
Waveform 1 – Inactive Clock Polarity Low and SPI Mode 0
Waveform 2 – Inactive Clock Polarity High and SPI Mode 3
14
AT45DB081B
SCK
SCK
SO
SO
CS
CS
SI
SI
HIGH IMPEDANCE
HIGH Z
t
CSS
t
Two different timing diagrams are shown below. Waveform 1 shows the SCK signal
being low when CS makes a high-to-low transition, and Waveform 2 shows the SCK sig-
nal being high when CS makes a high-to-low transition. Both waveforms show valid
timing diagrams. The setup and hold times for the SI signal are referenced to the low-to-
high transition on the SCK signal.
Waveform 1 shows timing that is also compatible with SPI Mode 0, and Waveform 2
shows timing that is compatible with SPI Mode 3.
R
, t
t
t
SU
t
V
CSS
t
DRIVING
F
SU
LEVELS
< 3 ns (10% to 90%)
AC
t
VALID IN
WL
VALID IN
0.45V
VALID OUT
2.4V
t
WH
t
WH
t
t
V
HO
DEVICE
UNDER
TEST
t
H
t
H
t
WL
VALID OUT
2.0
0.8
30 pF
t
HO
AC
MEASUREMENT
LEVEL
t
CSH
t
CSH
HIGH IMPEDANCE
HIGH IMPEDANCE
t
t
t
t
DIS
DIS
CS
CS
2225I–DFLSH–9/05