Memory is the highest density nonvolatile read write solution for sol-
id-state storage The 28F008SA’s extended cycling symmetrically blocked architecture fast access time
write automation and low power consumption provide a more reliable lower power lighter weight and higher
performance alternative to traditional rotating disk technology The 28F008SA brings new capabilities to porta-
ble computing Application and operating system software stored in resident flash memory arrays provide
instant-on rapid execute-in-place and protection from obsolescence through in-system software updates
Resident software also extends system battery life and increases reliability by reducing disk drive accesses
For high density data acquisition applications the 28F008SA offers a more cost-effective and reliable alterna-
tive to SRAM and battery Traditional high density embedded applications such as telecommunications can
take advantage of the 28F008SA’s nonvolatility blocking and minimal system code requirements for flexible
firmware and modular software designs
The 28F008SA is offered in 40-lead TSOP (standard and reverse) and 44-lead PSOP packages Pin assign-
ments simplify board layout when integrating multiple devices in a flash memory array or subsystem This
device uses an integrated Command User Interface and state machine for simplified block erasure and byte
write The 28F008SA memory map consists of 16 separately erasable 64-Kbyte blocks
Intel’s 28F008SA employs advanced CMOS circuitry for systems requiring low power consumption and noise
immunity Its 85 ns access time provides superior performance when compared with magnetic storage media
A deep powerdown mode lowers power consumption to 1
mW
typical thru V
CC
crucial in portable computing
handheld instrumentation and other low-power applications The RP power control input also provides
absolute data protection during system powerup down
Manufactured on Intel’s 0 8 micron ETOX process the 28F008SA provides the highest levels of quality
reliability and cost-effectiveness
Other brands and names are the property of their respective owners
Information in this document is provided in connection with Intel products Intel assumes no liability whatsoever including infringement of any patent or
copyright for sale and use of Intel products except as provided in Intel’s Terms and Conditions of Sale for such products Intel retains the right to make
changes to these specifications at any time without notice Microcomputer Products may have minor variations to this specification known as errata
COPYRIGHT
INTEL CORPORATION 1995
November 1995
Order Number 290429-005
28F008SA
The
Status Register
indicates the status of the
WSM and when the WSM successfully completes
the desired byte write or block erase operation
The
RY BY
output gives an additional indicator of
WSM activity providing capability for both hardware
signal of status (versus software polling) and status
masking (interrupt masking for background erase
for example) Status polling using RY BY mini-
mizes both CPU overhead and system power con-
sumption When low RY BY indicates that the
WSM is performing a block erase or byte write oper-
ation RY BY high indicates that the WSM is ready
for new commands block erase is suspended or the
device is in deep powerdown mode
Maximum access time is
85 ns (t
ACC
)
over the com-
mercial temperature range (0 C to
a
70 C) and over
V
CC
supply voltage range (4 5V to 5 5V and 4 75V to
5 25V)
I
CC
active current
(CMOS Read) is
20 mA
typical 35 mA maximum at 8 MHz
When the CE and RP pins are at V
CC
the
I
CC
CMOS Standby
mode is enabled
A
Deep Powerdown
mode is enabled when the
RP pin is at GND minimizing power consumption
and providing write protection
I
CC
current
in deep
powerdown is
0 20
mA
typical
Reset time of 400 ns
is required from RP switching high until outputs are
valid to read attempts Equivalently the device has a
wake time of 1
ms
from RP high until writes to the
Command User Interface are recognized by the
28F008SA With RP at GND the WSM is reset
and the Status Register is cleared
PRODUCT OVERVIEW
The 28F008SA is a high-performance
8-Mbit
(8 388 608 bit) memory organized as
1 Mbyte
(1 048 576 bytes) of 8 bits each
Sixteen 64-Kbyte
(65 536 byte)
blocks
are included on the 28F008SA
A memory map is shown in Figure 6 of this specifica-
tion A block erase operation erases one of the six-
teen blocks of memory in typically
1 6 seconds
in-
dependent of the remaining blocks Each block can
be independently erased and written
100 000 cy-
cles Erase Suspend
mode allows system software
to suspend block erase to read data or execute
code from any other block of the 28F008SA
The 28F008SA is available in the
40-lead TSOP
(Thin Small Outline Package 1 2 mm thick) and
44-
lead PSOP
(Plastic Small Outline) packages Pin-
outs are shown in Figures 2 and 4 of this specifica-
tion
The
Command User Interface
serves as the inter-
face between the microprocessor or microcontroller
and the internal operation of the 28F008SA
Byte Write and Block Erase Automation
allow
byte write and block erase operations to be execut-
ed using a two-write command sequence to the
Command User Interface The internal
Write State
Machine
(WSM) automatically executes the algo-
rithms and timings necessary for byte write and
block erase operations including verifications
thereby unburdening the microprocessor or micro-
controller Writing of memory data is performed in
byte increments typically within
9
ms
an 80% im-
provement over current flash memory products
I
PP
byte write and block erase currents
are
10 mA
typical 30 mA maximum V
PP
byte write and
block erase voltage
is
11 4V to 12 6V
2
28F008SA
Figure 1 Block Diagram
3
290429– 1
28F008SA
Table 1 Pin Description
Symbol
A
0
–A
19
DQ
0
–DQ
7
Type
INPUT
INPUT OUTPUT
Name and Function
ADDRESS INPUTS
for memory addresses Addresses are internally
latched during a write cycle
DATA INPUT OUTPUTS
Inputs data and commands during Command
User Interface write cycles outputs data during memory array Status
Register and Identifier read cycles The data pins are active high and
float to tri-state off when the chip is deselected or the outputs are
disabled Data is internally latched during a write cycle
CHIP ENABLE
Activates the device’s control logic input buffers
decoders and sense amplifiers CE is active low CE high deselects
the memory device and reduces power consumption to standby levels
RESET DEEP POWERDOWN
Puts the device in deep powerdown
mode RP is active low RP high gates normal operation RP also
locks out block erase or byte write operations when active low providing
data protection during power transitions RP active resets internal
automation Exit from Deep Powerdown sets device to read-array mode
OUTPUT ENABLE
Gates the device’s outputs through the data buffers
during a read cycle OE is active low
WRITE ENABLE
Controls writes to the Command User Interface and
array blocks WE is active low Addresses and data are latched on the
rising edge of the WE pulse
READY BUSY
Indicates the status of the internal Write State
Machine When low it indicates that the WSM is performing a block
erase or byte write operation RY BY high indicates that the WSM is
ready for new commands block erase is suspended or the device is in
deep powerdown mode RY BY is always active and does
NOT
float
to tri-state off when the chip is deselected or data outputs are disabled
The left side is a 180 counter, and the right side is a total circuit. How to implement the left side to execute 180 pulses, add to the total circuit is 0180, then execute 180 pulses, the total circui...
The previous post used the SSP bus to read and write sectors, and this post will read and write SD cards under the FAT file system.I originally wanted to write a simple FAT file system myself, but not...
[i=s] This post was last edited by paulhyde on 2014-9-15 09:18 [/i] I will upload a 12864 program to share with you first, and will upload it later when there is a complete improvement...
[Domestic chip] Recommended: 69P21 from Sinowin ElectronicsRecommendation: Zhongying Electronics' 69P21.Let me talk about a project I have done.It was a controller with a timer function for a brand. T...
A single-chip microcomputer is also called a single-chip microcontroller. It is not a chip that completes a certain logical function, but a computer system integrated into one chip. In general, a c...[Details]
The Portable Digital Data Acquisition System (PDDAS) uses LabVIEW Real-Time and PXI to control the wind tunnel test and record air pressure data from 128 different channels.
"The LabVIEW Real-...[Details]
As cellular phones become more advanced, the power consumption of the system during operation and the power consumption during standby are also increasing. Therefore, the power management design of...[Details]
To differentiate their products in a crowded and competitive market, manufacturers of handheld devices often consider battery life and power management as key selling points for cell phones, PDAs, ...[Details]
My colleague and I spent the day chatting in the hotel bar. We had met with several customers. We were both wondering how come these engineers we were meeting knew almost nothing about analog techn...[Details]
July 11, 2012, Beijing - Altera Corporation (NASDAQ: ALTR) today announced the launch of 40-Gbps Ethernet (40GbE) and 100-Gbps Ethernet (100GbE) intellectual property (IP) core products. These core...[Details]
A standard cell
is an electrochemical
cell
used as a voltage reference standard in many electrical standards laboratories
. If properly maintained, standard cells are very stable. The ...[Details]
In the analysis of electronic circuits, static analysis (also known as DC analysis) is the basis of circuit analysis. However, it is well known that electronic components are nonlinear, so the anal...[Details]
RS-422 and RS-485 are both serial data interface standards, which were developed and published by the Electronic Industries Association (EIA). RS-422 defines a balanced communication interface with a ...[Details]
In the single-chip microcomputer system, in addition to display devices, sound devices are often used, and the most common sound device is the buzzer. Buzzers are generally used for some low-demand...[Details]
VP2188 is a color STN LCD module produced by Jingdian Pengyuan. This module is a dot matrix transmissive color STN display screen with a color scale of 65 k colors and white LED backlight. Its core...[Details]
Capacitance Measurement
Used to verify that capacitors meet the manufacturer's specifications. For quality control, a group of capacitors may be placed in an environmental chamber and the cap...[Details]
OC faults may be the most frequent and the most frequent of all faults in the inverter. They alarm during the startup process, during the shutdown process, during operation, and even when powered o...[Details]
Introduction
Automakers are working to reduce vehicle weight to reduce CO2 emissions and improve fuel efficiency. Designers are therefore seeking new technologies and design techniques that can...[Details]
Describe how to meet the challenges of complexity with a modern wiring design toolset. Option codes and expressions can simulate the variables of an automotive project. A full-featured tool suite c...[Details]
Microcontroller MCU
京公网安备 11010802033920号
EEWORLD
