AT49BV322DT-70TU Atmel, AT49BV322DT-70TU Datasheet - Page 9

• Manufacturer Part Number: AT49BV322DT-70TU
• Description: IC FLASH 32MBIT 70NS 48TSOP
• Manufacturer: Atmel

Specifications of AT49BV322DT-70TU

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 32M (2M x 16)
• Speed: 70ns
• Interface: Parallel
• Voltage - Supply: 2.65 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-TSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.13
4.14
4.15
4.16
3582B–FLASH–11/05
RDY/BUSY
Common Flash Interface (CFI)
Hardware Data Protection
Input Levels
Addressing Table
the protection register, the Product ID Entry command is given followed by a normal read opera-
tion from an address within the protection register. After determining whether block B is
protected or not, or reading the protection register, the Product ID Exit command must be given
prior to performing any other operation.
An open-drain READY/BUSY output pin provides another method of detecting the end of a pro-
gram or erase operation. RDY/BUSY is actively pulled low during the internal program and erase
cycles and is released at the completion of the cycle. The open-drain connection allows for OR-
tying of several devices to the same RDY/BUSY line. Please see
for more details.
CFI is a published, standardized data structure that may be read from a flash device. CFI allows
system software to query the installed device to determine the configurations, various electrical
and timing parameters, and functions supported by the device. CFI is used to allow the system
to learn how to interface to the flash device most optimally. The two primary benefits of using
CFI are ease of upgrading and second source availability. The command to enter the CFI Query
mode is a one-bus cycle command which requires writing data 98h to address 55h. The CFI
Query command can be written when the device is ready to read data or can also be written
when the part is in the product ID mode. Once in the CFI Query mode, the system can read CFI
data at the addresses given in
the CFI Query mode, the product ID exit command must be given.
The Hardware Data Protection feature protects against inadvertent programs to the
AT49BV322D(T) in the following ways: (a) V
function is inhibited. (b) V
device will automatically time out 10 ms (typical) before programming. (c) Program inhibit: hold-
ing any one of OE low, CE high or WE high inhibits program cycles. (d) Program inhibit: V
less than V
While operating with a 2.65V to 3.6V power supply, the address inputs and control inputs (OE,
CE and WE) may be driven from 0 to 5.5V without adversely affecting the operation of the
device. The I/O lines can only be driven from 0 to V
ILPP
.
(1)(2)(3)
” on page 14
CC
power-on delay: once V
“Common Flash Interface Definition Table” on page
for the address locations in the protection register. To read
CC
sense: if V
CC
CC
+ 0.6V.
has reached the V
CC
is below 1.8V (typical), the program
AT49BV322D(T)
“Status Bit Table” on page 12
CC
sense level, the
27. To exit
PP
is
9