X76F640Y-2.7 Datasheet PDF - Xicor
| Part Number | X76F640Y-2.7 | |
| Description | Secure SerialFlash | |
| Manufacturers | Xicor | |
| Logo |  |
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There is a preview and X76F640Y-2.7 download ( pdf file ) link at the bottom of this page. Total 17 Pages | ||
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64K
X76F640
8Kx8+32x8
Secure SerialFlash
FEATURES
• 64-bit Password Security
—Five 64-bit Passwords for Read, Program
and Reset
• 8192 Byte+32 Byte Password Protected Arrays
—Seperate Read Passwords
—Seperate Write Passwords
—Reset Password
• Programmable Passwords
• Retry Counter Register
—Allows 8 tries before clearing of both arrays
—Password Protected Reset
• 32-bit Response to Reset (RST Input)
• 32 byte Sector Program
• 400kHz Clock Rate
• 2 wire Serial Interface
• Low Power CMOS
—2.7 to 5.5V operation
—Standby current Less than 1µA
—Active current less than 3 mA
• High Reliability Endurance:
—100,000 Write Cycles
• Data Retention: 100 years
• Available in:
—8 lead SOIC
—SmartCard Module
DESCRIPTION
The X76F640 is a Password Access Security Supervisor,
containing one 65536-bit Secure SerialFlash array and
one 256-bit Secure SerialFlash array. Access to each
memory array is controlled by two 64-bit passwords.
These passwords protect read and write operations of
the memory array. A separate RESET password is used
to reset the passwords and clear the memory arrays in
the event the read and write passwords are lost.
The X76F640 features a serial interface and software
protocol allowing operation on a popular two wire bus.
The bus signals are a clock Input (SCL) and a bidirec-
tional data input and output (SDA). Access to the device
is controlled through a chip select (CS) input, allowing
any number of devices to share the same bus.
The X76F640 also features a synchronous response to
reset providing an automatic output of a hard-wired 32-bit
data stream conforming to the industry standard for
memory cards.
The X76F640 utilizes Xicor’s proprietary Direct WriteTM
cell, providing a minimum endurance of 100,000 cycles
and a minimum data retention of 100 years.
Functional Diagram
CS
SCL
SDA
INTERFACE
LOGIC
RST
©Xicor, Inc. 1994, 1995, 1996 Patents Pending
7025-1.4 3/24/97 T2/C0/D1 SH
CHIP ENABLE
DATA TRANSFER
ARRAY ACCESS
ENABLE
PASSWORD ARRAY
AND PASSWORD
VERIFICATION LOGIC
RESET
RESPONSE REGISTER
1
8K BYTE
SerialFlash ARRAY
ARRAY 0
(PASSWORD PROTECTED)
32 BYTE
SerialFlash ARRAY
ARRAY 1
(PASSWORD PROTECTED)
RETRY COUNTER
7025 FM 01
Characteristics subject to change without notice
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X76F640
PROGRAM OPERATIONS
Sector Programming
The sector program mode requires issuing the 8-bit write
command followed by the password, password Ack com-
mand, the address and then the data bytes transferred
as illustrated in figure 4. Up to 32 bytes may be trans-
ferred. After the last byte to be transferred is acknowl-
edged a stop condition is issued which starts the
nonvolatile write cycle.
Figure 4. Sector Programming
SDA S
COMMAND
Write
Password
7
If ACK, Then
Password Matches
ACK POLLING
COMMAND
S
Write
Password
0
Wait tWC
OR
Repeated
ACK Polling
Command
Data 0
...
Data 31
Wait tWC
S Data ACK Polling
7025 FM 07
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for X76F640Y-2.7 electronic component. |
| Information | Total 17 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ X76F640Y-2.7.PDF Datasheet ] | |
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