at45db021d-ssh-sl955 ATMEL Corporation, at45db021d-ssh-sl955 Datasheet - Page 35

• Manufacturer Part Number: at45db021d-ssh-sl955
• Description: 2-megabit 2.7-volt Minimum Dataflash
• Manufacturer: ATMEL Corporation

19. Input Test Waveforms and Measurement Levels
20. Output Test Load
21. AC Waveforms
3638F–DFLASH–4/08
t
Six different timing waveforms are shown on
low when CS makes a high-to-low transition, and waveform 2 shows the SCK signal being high
when CS makes a high-to-low transition. In both cases, output SO becomes valid while the
SCK signal is still low (SCK low time is specified as t
RapidS serial interface but for frequencies up to 66 MHz. Waveforms 1 and 2 are compatible
with SPI Mode 0 and SPI Mode 3, respectively.
Waveform 3 and waveform 4 illustrate general timing diagram for RapidS serial interface. These
are similar to waveform 1 and waveform 2, except that output SO is not restricted to become
valid during the t
imum frequency = 66 MHz) of the RapidS serial case.
R
, t
F
< 2 ns (10% to 90%)
DRIVING
LEVELS
AC
WL
0.45V
period. These timing waveforms are valid over the full frequency range (max-
2.4V
DEVICE
UNDER
TEST
1.5V
30 pF
page
AC
MEASUREMENT
LEVEL
36. Waveform 1 shows the SCK signal being
WL
). Timing waveforms 1 and 2 conform to
AT45DB021D
35