AT49BV1614-90TC Atmel, AT49BV1614-90TC Datasheet - Page 3

• Manufacturer Part Number: AT49BV1614-90TC
• Description: IC FLASH 16MBIT 90NS 48TSOP
• Manufacturer: Atmel

Specifications of AT49BV1614-90TC

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 16M (2M x 8 or 1M x 16)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 48-TSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

A VPP pin is provided to improve program/erase times.
This pin can be tied to V
programming and erasing, the pin should supply 4.5 to 5.5
volts during program and erase operations.
A six-byte command (Bypass Unlock) sequence to remove
the requirement of entering the three-byte program
sequence is offered to further improve programming time.
After entering the six-byte code, only single pulses on the
write control lines are required for writing into the device.
This mode (Single Pulse Byte/Word Program) is exited by
powering down the device, or by pulsing the RESET pin
low for a minimum of 50 ns and then bringing it back to V
Erase and Erase Suspend/Resume commands will not
work while in this mode; if entered they will result in data
Block Diagram
Device Operation
READ: The AT49BV16X4(T) is accessed like an EPROM.
When CE and OE are low and WE is high, the data stored
at the memory location determined by the address pins are
asserted on the outputs. The outputs are put in the high-
impedance state whenever CE or OE is high. This dual-line
control gives designers flexibility in preventing bus
contention.
A0 - A19
CC
Y-DECODER
X-DECODER
ADDRESS
BUFFER
LATCH
INPUT
. To take advantage of faster
OUTPUT
BUFFER
PLANE A SECTORS
COMPARATOR
I/O0 - I/O15/A-1
SECTORS
PLANE B
IDENTIFIER
REGISTER
REGISTER
Y-GATING
STATUS
DATA
CC
.
BUFFER
INPUT
being programmed into the device. It is not recommended
that the six-byte code reside in the software of the final
product but only exist in external programming code.
For the AT49BV1614(T), the BYTE pin controls whether
the device data I/O pins operate in the byte or word config-
uration. If the BYTE pin is set at logic “1”, the device is in
word configuration, I/O0 - I/O15 are active and controlled
by CE and OE.
If the BYTE pin is set at logic “0”, the device is in byte con-
figuration, and only data I/O pins I/O0 - I/O7 are active and
controlled by CE and OE. The data I/O pins I/O8 - I/O14
are tri-stated, and the I/O15 pin is used as an input for the
LSB (A-1) address function.
COMMAND SEQUENCES: When the device is first pow-
ered on, it will be reset to the read or standby mode,
depending upon the state of the control line inputs. In order
to perform other device functions, a series of command
sequences are entered into the device. The command
sequences are shown in the Command Definitions table
(I/O8 - I/O15 are don’t care inputs for the command codes).
WRITE STATE
COMMAND
REGISTER
MACHINE
PROGRAM/ERASE
VOLTAGE SWITCH
CE
WE
OE
RESET
BYTE
VPP
VCC
GND
RDY/BUSY
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