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PDF AM29LV008B Data sheet ( Hoja de datos )
| Número de pieza | AM29LV008B | |
| Descripción | 8 Megabit (1 M x 8-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory | |
| Fabricantes | AMD | |
| Logotipo |  |
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PRELIMINARY
Am29LV008B
8 Megabit (1 M x 8-Bit)
CMOS 3.0 Volt-only Boot Sector Flash Memory
DISTINCTIVE CHARACTERISTICS
s Single power supply operation
— Full voltage range: 2.7 to 3.6 volt read and write
operations for battery-powered applications
— Regulated voltage range: 3.0 to 3.6 volt read
and write operations and for compatibility with
high performance 3.3 volt microprocessors
s Manufactured on 0.35 µm process technology
— Compatible with 0.5 µm Am29LV008 device
s High performance
— Full voltage range: access times as fast as 80 ns
— Regulated voltage range: access times as fast
as 70 ns
s Ultra low power consumption (typical values at
5 MHz)
— 200 nA Automatic Sleep mode current
— 200 nA standby mode current
— 7 mA read current
— 15 mA program/erase current
s Flexible sector architecture
— One 16 Kbyte, two 8 Kbyte, one 32 Kbyte, and
fifteen 64 Kbyte sectors
— Supports full chip erase
— Sector Protection features:
A hardware method of locking a sector to
prevent any program or erase operations within
that sector
Sectors can be locked in-system or via
programming equipment
Temporary Sector Unprotect feature allows code
changes in previously locked sectors
s Unlock Bypass Program Command
— Reduces overall programming time when
issuing multiple program command sequences
s Top or bottom boot block configurations
available
s Embedded Algorithms
— Embedded Erase algorithm automatically
preprograms and erases the entire chip or any
combination of designated sectors
— Embedded Program algorithm automatically
writes and verifies data at specified addresses
s Minimum 1,000,000 write cycle guarantee per
sector
s Package option
— 40-pin TSOP
s Compatibility with JEDEC standards
— Pinout and software compatible with single-
power supply Flash
— Superior inadvertent write protection
s Data# Polling and toggle bits
— Provides a software method of detecting
program or erase operation completion
s Ready/Busy# pin (RY/BY#)
— Provides a hardware method of detecting
program or erase cycle completion
s Erase Suspend/Erase Resume
— Suspends an erase operation to read data from,
or program data to, a sector that is not being
erased, then resumes the erase operation
s Hardware reset pin (RESET#)
— Hardware method to reset the device to reading
array data
This document contains information on a product under development at Advanced Micro Devices. The information
Publication# 21524 Rev: B Amendment/+1
is intended to help you evaluate this product. AMD reserves the right to change or discontinue work on this proposed
Issue Date: March 1998
product without notice.
Refer to AMD’s Website (www.amd.com) for the latest information.
1 page  
PRELIMINARY
PIN CONFIGURATION
A0–A19 = 20 addresses
DQ0–DQ7 = 8 data inputs/outputs
CE#
= Chip enable
OE#
= Output enable
WE#
= Write enable
RESET# = Hardware reset pin, active low
RY/BY# = Ready/Busy# output
VCC = 3.0 volt-only single power supply
(see Product Selector Guide for speed
options and voltage supply tolerances)
VSS = Device ground
NC = Pin not connected internally
LOGIC SYMBOL
20
A0–A19
DQ0–DQ7
CE#
OE#
WE#
RESET#
RY/BY#
8
21524B-3
Am29LV008B
5
5 Page 
PRELIMINARY
START
PLSCNT = 1
RESET# = VID
Wait 1 µs
Temporary Sector
Unprotect Mode
No First Write
Cycle = 60h?
Yes
Set up sector
address
Sector Protect:
Write 60h to sector
address with
A6 = 0, A1 = 1,
A0 = 0
Wait 150 µs
Increment
PLSCNT
No
PLSCNT
= 25?
Yes
Device failed
Verify Sector
Protect: Write 40h
to sector address
with A6 = 0,
A1 = 1, A0 = 0
Read from
sector address
with A6 = 0,
A1 = 1, A0 = 0
Reset
PLSCNT = 1
No
Data = 01h?
Yes
Yes
Protect another
sector?
No
Remove VID
from RESET#
Sector Protect
Algorithm
Write reset
command
Sector Protect
complete
Protect all sectors:
The indicated portion
of the sector protect
algorithm must be
performed for all
unprotected sectors
prior to issuing the
first sector
unprotect address
Increment
PLSCNT
START
PLSCNT = 1
RESET# = VID
Wait 1 µs
First Write No Temporary Sector
Cycle = 60h?
Unprotect Mode
Yes
No All sectors
protected?
Yes
Set up first sector
address
Sector Unprotect:
Write 60h to sector
address with
A6 = 1, A1 = 1,
A0 = 0
Wait 15 ms
Verify Sector
Unprotect: Write
40h to sector
address with
A6 = 1, A1 = 1,
A0 = 0
No
PLSCNT
= 1000?
Yes
Read from
sector address
with A6 = 1,
A1 = 1, A0 = 0
No
Data = 00h?
Yes
Set up
next sector
address
Device failed
Sector Unprotect
Algorithm
Last sector
verified?
No
Yes
Remove VID
from RESET#
Write reset
command
Sector Unprotect
complete
21524B-4
Figure 1. In-System Sector Protect/Unprotect Algorithms
Am29LV008B
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AM29LV008B.PDF ] | |
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