AT26DF041-MU ATMEL [ATMEL Corporation], AT26DF041-MU Datasheet - Page 13

• Manufacturer Part Number: AT26DF041-MU
• Description: 4-MEGABIT 3.0-VOLT ONLY OR 2.7-VOLT ONLY SERIAL FIRMWARE DATAFLASH-R
• Manufacturer: ATMEL [ATMEL Corporation]

10. Input Test Waveforms and Measurement Levels
11. Output Test Load
12. AC Waveforms
3495B–DFLSH–8/05
t
Two different timing diagrams are shown below. Waveform 1 shows timing that is compatible
with SPI Mode 0, and Waveform 2 shows timing that is compatible with SPI Mode 3. The setup
and hold times for the SI signal are referenced to the low-to-high transition on the SCK signal.
Figure 12-1. Waveform 1 – SPI Mode 0
Figure 12-2. Waveform 2 – SPI Mode 3
R
DRIVING
LEVELS
, t
F
AC
< 3 ns (10% to 90%)
SCK
SCK
SO
SO
CS
CS
SI
SI
0.45V
2.4V
HIGH IMPEDANCE
HIGH Z
t
CSS
t
t
SU
DEVICE
t
V
UNDER
CSS
t
TEST
SU
t
VALID IN
WL
VALID IN
2.0
0.8
VALID OUT
t
WH
t
WH
t
AC
MEASUREMENT
LEVEL
t
30 pF
V
HO
tH
t
H
t
WL
VALID OUT
t
HO
t
CSH
t
CSH
HIGH IMPEDANCE
HIGH IMPEDANCE
t
t
t
t
DIS
DIS
CS
CS
AT26DF041
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