AT49BV6416-70TU SL383 Atmel, AT49BV6416-70TU SL383 Datasheet - Page 8

• Manufacturer Part Number: AT49BV6416-70TU SL383
• Description: IC FLASH 64MBIT 70NS 48TSOP
• Manufacturer: Atmel

Specifications of AT49BV6416-70TU SL383

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 64M (4M x 16)
• Speed: 70ns
• Interface: Parallel
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-TSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.11
3.12
3.13
3.14
3.15
8
128-Bit Protection Register
Common Flash Interface (CFI)
Hardware Data Protection
Input Levels
Output Levels
AT49BV6416(T)
erase suspend and program suspend are the same, and the command sequence for the erase
resume and program resume are the same.
The AT49BV6416(T) contains a 128-bit register that can be used for security purposes in sys-
tem design. The protection register is divided into two 64-bit blocks. The two blocks are
designated as block A and block B. The data in block A is non-changeable and is programmed
at the factory with a unique number. The data in block B is programmed by the user and can be
locked out such that data in the block cannot be reprogrammed. To program block B in the pro-
tection register, the four-bus cycle Program Protection Register command must be used as
shown in the
lock protection register command must be used as shown in the Command Definition table. Data
bit D1 must be zero during the fourth bus cycle. All other data bits during the fourth bus cycle are
don’t cares. To determine whether block B is locked out, the status of Block B Protection com-
mand is given. If data bit D1 is zero, block B is locked. If data bit D1 is one, block B can be
reprogrammed. Please see the
address locations in the protection register. To read the protection register, the Product ID Entry
command is given followed by a normal read operation 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.
Common Flash Interface (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 config-
urations, 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 com-
mand 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
Table” on page
Hardware features protect against inadvertent programs to the AT49BV6416(T) in the following
ways: (a) V
power-on delay: once V
out 10 ms (typical) before programming. (c) Program inhibit: holding any one of OE low, CE high
or WE high inhibits program cycles. (d) Noise filter: pulses of less than 15 ns (typical) on the WE
o r C E i n p u t s w i l l n o t i n i t i a t e a p r o g r a m c y c l e . ( e ) V
While operating with a 2.7V 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 be driven from 0 to V
For the AT49BV6416(T), output high levels are equal to V
output levels, V
CC
“Command Definition Table” on page
sense: if V
CCQ
25. To exit the CFI Query mode, the product ID exit command must be given.
must be tied to V
CC
CC
has reached the V
is below 1.8V (typical), the program function is inhibited. (b) V
“Protection Register Addressing Table” on page 13
CC
CCQ
.
+ 0.6V.
CC
sense level, the device will automatically time-
12. To lock out block B, the four-bus cycle
CCQ
“Common Flash Interface Definition
- 0.1V (not V
P P
i s l e s s t h a n V
CC
). For 2.7V to 3.6V
3451D–FLASH–04/06
for the
I L P P
CC
.