1K
X76F101
Secure SerialFlash
DESCRIPTION
128 x 8 bit
FEATURES
• 64-bit Password Security
• One Array (112 Bytes) Two Passwords
—Read Password
—Write Password
• Programmable Passwords
• 32-bit Response to Reset (RST Input)
• 8 byte Sector Write mode
• 1MHz Clock Rate
• 2 wire Serial Interface
• Low Power CMOS
—3.0 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 PDIP, SOIC, MSOP and ISO Card
—SmartCard Module
The X76F101 is a Password Access Security Supervisor,
containing one 896-bit Secure SerialFlash array. Access
to the memory array can be controlled by two 64-bit
passwords. These passwords protect read and write
operations of the memory array.
The X76F101 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
bidirectional 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 X76F101 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 X76F101 utilizes Xicor’s proprietary Direct Write
TM
cell, providing a minimum endurance of 100,000 cycles
and a minimum data retention of 100 years.
Functional Diagram
CS
CS
SCL
SDA
SCL
INTERFACE
Interface
LOGIC
Logic
CHIP ENABLE
Chip Enable
DATA TRANSFER
Data Transfer
ARRAY ACCESS
Array Access
ENABLE
Enable
SDA
8K BYTE
SerialFlash ARRAY
Erase Logic
ARRAY 0
(PASSWORD PROTECTED)
112 Byte
32 BYTE
SerialFlash ARRAY
EEPROM Array
PASSWORD ARRAY
Password Array
AND PASSWORD
and Password
VERIFICATION LOGIC
ARRAY 1
(PASSWORD PROTECTED)
Verification Logic
RST
RESET
ISO Reset
RESPONSE REGISTER
Response Register
RETRY COUNTER
7025 FM 01
RST
©
Xicor, Inc. 1994, 1995, 1996 Patents Pending
7065 -1.1 4/17/98 T2/C0/D0 SH
1
Characteristics subject to change without notice
XICOR [ XICOR INC. ]
