AT45DB642-TC Atmel, AT45DB642-TC Datasheet - Page 17

• Manufacturer Part Number: AT45DB642-TC
• Description: IC FLASH 64MBIT 20MHZ 40TSOP
• Manufacturer: Atmel

Specifications of AT45DB642-TC

• Format - Memory: FLASH
• Memory Type: DataFLASH
• Memory Size: 64M (8192 pages x 1056 bytes)
• Speed: 20MHz Serial/5MHz Parallel
• Interface: Parallel/Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-TSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

AC Waveforms
Waveform 1 –
Inactive Clock
Polarity Low and
SPI Mode 0
Waveform 2 –
Inactive Clock
Polarity High and
SPI Mode 3
1638F–DFLSH–09/02
Two different timing diagrams are shown below. Waveform 1 shows the SCK/CLK signal
being low when CS makes a high-to-low transition, and Waveform 2 shows the SCK/CLK sig-
nal being high when CS makes a high-to-low transition. Both waveforms show valid timing
diagrams. The setup and hold times for the input signals (SI or I/O7-I/O0) are referenced to the
low-to-high transition on the SCK/CLK 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.
SO or I/O7 - I/O0
SO or I/O7 - I/O0
SI or I/O7 - I/O0
SI or I/O7 - I/O0
(OUTPUT)
(OUTPUT)
SCK/CLK
SCK/CLK
(INPUT)
(INPUT)
CS
CS
HIGH IMPEDANCE
HIGH Z
tCSS
tSU
tCSS
tV
tSU
VALID IN
tWL
VALID IN
tWH
VALID OUT
tWH
tV
tHO
tH
tH
tWL
VALID OUT
tHO
tCSH
tCSH
AT45DB642
tCS
HIGH IMPEDANCE
tDIS
tCS
HIGH IMPEDANCE
tDIS
17