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AT45DB321 数据表(PDF) 9 Page - ATMEL Corporation

部件名 AT45DB321
功能描述  32-Megabit 2.7-volt Only Serial DataFlash
PDF  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  ATMEL [ATMEL Corporation]
网页  http://www.atmel.com
标志 ATMEL - ATMEL Corporation

AT45DB321 数据表(HTML) 9 Page - ATMEL Corporation

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AT45DB321
9
AC Waveforms
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 signal
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
Waveform 1 – Inactive Clock Polarity Low
Waveform 2 – Inactive Clock Polarity High
CS
SCK
SI
SO
tCSS
VALID IN
tH
tSU
tWH
tWL
tCSH
tCS
tV
HIGH IMPEDANCE
VALID OUT
tHO
tDIS
HIGH IMPEDANCE
CS
SCK
SI
SO
tCSS
VALID IN
tH
tSU
tWL
tWH
tCSH
tCS
tV
HIGH Z
VALID OUT
tHO
tDIS
HIGH IMPEDANCE



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