AT45DB041B-TI-2.5 Atmel, AT45DB041B-TI-2.5 Datasheet - Page 15
![IC FLASH 4MBIT 20MHZ 28TSOP](/photos/7/21/72191/313-28-tsop_sml.jpg)
AT45DB041B-TI-2.5
Manufacturer Part Number
AT45DB041B-TI-2.5
Description
IC FLASH 4MBIT 20MHZ 28TSOP
Manufacturer
Atmel
Datasheet
1.AT45DB041B-CC.pdf
(35 pages)
Specifications of AT45DB041B-TI-2.5
Format - Memory
FLASH
Memory Type
DataFLASH
Memory Size
4M (2048 pages x 264 bytes)
Speed
20MHz
Interface
SPI, 3-Wire Serial
Voltage - Supply
2.5 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Package / Case
28-TSOP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
11. AC Waveforms
11.1
11.2
11.3
Note:
3443D–DFLSH–2/08
Waveform 1 – Inactive Clock Polarity Low and SPI Mode 0
Waveform 2 – Inactive Clock Polarity High and SPI Mode 3
Reset Timing (Inactive Clock Polarity Low Shown)
The CS signal should be in the high state before the RESET signal is deasserted.
RESET
SCK
SO
CS
SI
SCK
SCK
SO
SO
CS
CS
SI
SI
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 tim-
ing that is compatible with SPI Mode 3.
HIGH IMPEDANCE
HIGH Z
HIGH IMPEDANCE
t
CSS
t
t
SU
t
V
CSS
t
SU
t
VALID IN
WL
VALID IN
VALID OUT
t
WH
t
WH
t
t
V
HO
tH
t
H
t
WL
VALID OUT
t
HO
t
CSH
t
CSH
t RST
t REC
t
HIGH IMPEDANCE
t
HIGH IMPEDANCE
t
t
DIS
DIS
CS
CS
HIGH IMPEDANCE
AT45DB041B
t CSS
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