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| AT45DB021D_08 Datasheet, PDF (36/52 Pages) ATMEL Corporation – 2-megabit 2.7-volt Minimum DataFlash | |||
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21.1
Waveform 1 â SPI Mode 0 Compatible (for Frequencies up to 66 MHz)
tCS
CS
SCK
tCSS
tWH
tWL
tCSH
tV
HIGH IMPEDANCE
SO
tHO
VALID OUT
tDIS
HIGH IMPEDANCE
tSU
tH
SI
VALID IN
21.2
Waveform 2 â SPI Mode 3 Compatible (for Frequencies up to 66 MHz)
tCS
CS
SCK
tCSS
tWL
tWH
tCSH
tV
HIGH Z
SO
tHO
VALID OUT
tDIS
HIGH IMPEDANCE
tSU
tH
SI
VALID IN
21.3 Waveform 3 â RapidS Mode 0 (FMAX = 66 MHz)
CS
SCK
SO
SI
tCSS
tWH
tWL
tV
HIGH IMPEDANCE
tSU
tH
VALID IN
tCSH
tHO
VALID OUT
tCS
tDIS
HIGH IMPEDANCE
21.4 Waveform 4 â RapidS Mode 3 (FMAX = 66 MHz)
CS
SCK
SO
SI
tCSS
tWL
tWH
tV
HIGH Z
tSU
tHO
VALID OUT
tH
VALID IN
tCSH
tCS
tDIS
HIGH IMPEDANCE
36 AT45DB021D
3638FâDFLASHâ4/08
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