X25F047 Protection Datasheet

X25F047 Datasheet, PDF, Equivalent


Part Number

X25F047

Description

SPI SerialFlash with Block Lock TM Protection

Manufacture

Xicor

Total Page 14 Pages
Datasheet
Download X25F047 Datasheet


X25F047
4K
X25F047
512 x 8 Bit
SPI SerialFlash with Block LockTM Protection
FEATURES
• 1MHz Clock Rate
• SPI Modes (0,0 & 1,1)
• 512 x 8 Bits
—16 Byte Small Sector Program Mode
• Low Power CMOS
—<1µA Standby Current
—<3mA Active Current during Program
—<400µA Active Current during Read
• 1.8V to 3.6V or 5V “Univolt” Read and Program
Power Supply Versions
• Block Lock Protection
—Block Lock Protect 0, any 1/4, 1st 1/2, First or
Last Sector of SerialFlash Array
• Built-in Inadvertent Program Protection
—Power-Up/Power-Down Protection Circuitry
—Program Enable Latch
—Program Protect Pin
• Self-Timed Program Cycle
—5ms Program Cycle Time (Typical)
• High Reliability
—Endurance: 100,000 Cycles/Byte
—Data Retention: 100 Years
—ESD: 2000V on all pins
• 8-Lead SOIC Package
• 8-Lead MSOP Package
• 8-Lead TSSOP Package
• 8-Pin Mini-DIP Package
FUNCTIONAL DIAGRAM
DESCRIPTION
The X25F047 is a CMOS 4K-bit SerialFlash, internally
organized as 512 x 8. The X25F047 features a Serial
Peripheral Interface (SPI) and software protocol
allowing operation on a simple four-wire bus. The bus
signals are a clock input (SCK) plus separate data in (SI)
and data out (SO) lines. Access to the device is
controlled through a chip select (CS) input, allowing any
number of devices to share the same bus.
There are eight options for programmable, nonvolatile,
Block Lock Protection available to the end user. These
options are implemented via special instructions
programmed to the part. The X25F047 also features a
PP pin that can be used for hardwire protection of the
part, disabling all programming attempts, as well as a
Program Enable Latch that must be set before a program
operation can be initiated.
The X25F047 utilizes Xicor’s proprietary Direct WriteTM
cell, providing a minimum endurance of 100,000 cycles
per sector and a minimum data retention of 100 years.
SI
SO
SCK
CS
COMMAND
DECODE
AND
CONTROL
LOGIC
DATA REGISTER
Y DECODE LOGIC
16 8
X
DECODE
LOGIC
32
SERIALFLASH
ARRAY
(512 x 8)
PP PROGRAM CONTROL LOGIC
©Xicor, Inc. 1994, 1995, 1996 Patents Pending
7005-0.9 5/7/97 T4/C0/D1
1
HIGH VOLTAGE
CONTROL
7005 FRM 01.3
Characteristics subject to change without notice

X25F047
X25F047
PIN DESCRIPTIONS
Serial Output (SO)
SO is a push/pull serial data output pin. During a read
cycle, data is shifted out on this pin. Data is clocked out
by the falling edge of the serial clock.
Serial Input (SI)
SI is a serial data input pin. All opcodes, byte addresses,
and data to be programmed to the memory are input on
this pin. Data is latched by the rising edge of the serial
clock.
Serial Clock (SCK)
The Serial Clock controls the serial bus timing for data
input and output. Opcodes, addresses, or data present
on the SI pin are latched on the rising edge of the clock
input, while data on the SO pin change after the falling
edge of the clock input.
Chip Select (CS)
When CS is HIGH, the X25F047 is deselected and the
SO output pin is at high impedance and unless a nonvol-
atile write cycle is underway, the X25F047 will be in the
standby power mode. CS LOW enables the X25F047,
placing it in the active power mode. It should be noted
that after power-up, a HIGH to LOW transition on CS is
required prior to the start of any operation.
Program Protect (PP)
When PP is LOW, nonvolatile writes to the X25F047 are
disabled, but the part otherwise functions normally. When
PP is held HIGH, all functions, including nonvolatile
writes, operate normally. PP going LOW while CS is still
LOW will interrupt a programming cycle to the X25F047.
If the nonvolatile write cycle has already been initiated,
PP going low will have no affect on this cycle.
PIN NAMES
Symbol
CS
SO
SI
SCK
PP
VSS
VCC
NC
Description
Chip Select Input
Serial Output
Serial Input
Serial Clock Input
Program Protect Input
Ground
Supply Voltage
No Connect
7005 FRM T01
PIN CONFIGURATION
8-LEAD SOIC/DIP
Not to scale
*0.197"
CS
SO
PP
V SS
18
27
X25F047
36
45
V CC
NC
SCK
SI
0.120"
SO
CS
VSS
PP
*0.244"
8-LEAD MSOP
18
27
X25F047
36
45
V CC
NC
SI
SCK
0.122"
NC
VCC
CS
SO
0.193"
8-LEAD TSSOP
1
2
X25F047
3
4
8
7
6
5
SCK
SI
V SS
PP
*SOIC Measurement
0.252"
7005 FRM 02
PRINCIPLES OF OPERATION
The X25F047 is a 512 x 8 SerialFlash designed to inter-
face directly with the synchronous Serial Peripheral Inter-
face (SPI) of many popular microcontroller families.
The X25F047 contains an 8-bit instruction register. It is
accessed via the SI input, with data being clocked in on
the rising edge of SCK. CS must be LOW and the PP
input must be HIGH during the entire operation. Table 1
contains a list of the instructions and their opcodes. All
instructions, addresses and data are transferred MSB first.
Data input is sampled on the first rising edge of SCK
after CS goes LOW. SCK is static, allowing the user to
stop the clock and then start it again to resume opera-
tions where left off.
Program Enable Latch
The X25F047 contains a “Program Enable” latch. This
latch must be SET before a program operation is initi-
ated. The PREN instruction will set the latch and the
PRDI instruction will reset the latch (Figure 4). This latch
is automatically reset upon a power-up condition and
after the completion of a sector program cycle.
2


Features 4K X25F047 SPI SerialFlash with Block L ockTM Protection DESCRIPTION 512 x 8 B it FEATURES • 1MHz Clock Rate • SP I Modes (0,0 & 1,1) • 512 x 8 Bits 16 Byte Small Sector Program Mode • Low Power CMOS —<1µA Standby Current —<3mA Active Current during Program —<400µA Active Current during Read 1.8V to 3.6V or 5V “Univolt” Rea d and Program Power Supply Versions • Block Lock Protection —Block Lock Pr otect 0, any 1/4, 1st 1/2, First or Las t Sector of SerialFlash Array • Built -in Inadvertent Program Protection —P ower-Up/Power-Down Protection Circuitry —Program Enable Latch —Program Pro tect Pin • Self-Timed Program Cycle 5ms Program Cycle Time (Typical) • High Reliability —Endurance: 100,000 Cycles/Byte —Data Retention: 100 Year s —ESD: 2000V on all pins • 8-Lead SOIC Package • 8-Lead MSOP Package 8-Lead TSSOP Package • 8-Pin Mini-D IP Package FUNCTIONAL DIAGRAM SI SO COM MAND DECODE AND CONTROL LOGIC The X25F047 is a CMOS 4K-bit SerialFlash, internally organized as 512 x 8. The X25F047 f.
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