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PDF 29LV400BA Data sheet ( Hoja de datos )
| Número de pieza | 29LV400BA | |
| Descripción | AM29LV400BA | |
| Fabricantes | Advanced Micro Devices | |
| Logotipo |  |
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PRELIMINARY
Am29LV400
4 Megabit (512 K x 8-Bit/256 K x 16-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
www.DataSheet4U.comand write operations and for compatibility with
high performance 3.3 volt microprocessors
s High performance
— Full voltage range: access times as fast as 100
ns
— Regulated voltage range: access times as fast
as 90 ns
s Ultra low power consumption (typical values at
5 MHz)
— 200 nA Automatic Sleep mode current
— 200 nA standby mode current
— 10 mA read current
— 20 mA program/erase current
s Flexible sector architecture
— One 16 Kbyte, two 8 Kbyte, one 32 Kbyte, and
seven 64 Kbyte sectors (byte mode)
— One 8 Kword, two 4 Kword, one 16 Kword, and
seven 32 Kword sectors (word mode)
— 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 via programming
equipment
Temporary Sector Unprotect feature allows code
changes in previously locked sectors
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 Typical 1,000,000 write cycles per sector
(100,000 cycles minimum guaranteed)
s Package option
— 48-ball FBGA
— 48-pin TSOP
— 44-pin SO
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
Publication# 20514 Rev: C Amendment/+1
Issue Date: March 1998
1 page  
CONNECTION DIAGRAMS
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NC 1
RY/BY# 2
A17 3
A7 4
A6 5
A5 6
A4 7
A3 8
A2 9
A1 10
A0 11
CE# 12
VSS 13
OE# 14
DQ0 15
DQ8 16
DQ1 17
DQ9 18
DQ2 19
DQ10 20
DQ3 21
DQ11 22
PRELIMINARY
44 RESET#
43 WE#
42 A8
41 A9
40 A10
39 A11
38 A12
37 A13
36 A14
35 A15
34 A16
SO 33 BYTE#
32 VSS
31 DQ15/A-1
30 DQ7
29 DQ14
28 DQ6
27 DQ13
26 DQ5
25 DQ12
24 DQ4
23 VCC
FBGA
Bump Side (Bottom) View
A1 B1 C1
A3 A4 A2
A2 B2 C2
A7 A17 A6
D1 E1 F1 G1 H1
A1
A0
CE#
OE#
VSS
D2 E2 F2 G2 H2
A5
DQ0 DQ8
DQ9 DQ1
A3 B3 C3 D3 E3 F3 G3 H3
RY/BY# NC NC NC DQ2 DQ10 DQ11 DQ3
A4 B4
WE# RESET#
C4
NC
A5 B5 C5
A9 A8 A10
D4 E4 F4 G4 H4
NC DQ5 DQ12 VCC DQ4
D5 E5 F5 G5 H5
A11 DQ7 DQ14 DQ13 DQ6
A6 B6 C6 D6 E6 F6 G6 H6
A13 A12 A14 A15 A16 BYTE# DQ15/A-1 VSS
20514C-3
5 Am29LV400
5 Page 
PRELIMINARY
Autoselect Mode
The autoselect mode provides manufacturer and de-
vice identification, and sector protection verification,
through identifier codes output on DQ7–DQ0. This
mode is primarily intended for programming equipment
to automatically match a device to be programmed with
its corresponding programming algorithm. However,
the autoselect codes can also be accessed in-system
through the command register.
When using programming equipment, the autoselect
mode requires VID (11.5 V to 12.5 V) on address pin
A9. Address pins A6, A1, and A0 must be as shown in
Table 4. In addition, when verifying sector protection,
the sector address must appear on the appropriate
highest order address bits (see Tables 2 and 3). Table
4 shows the remaining address bits that are don’t care.
When all necessary bits have been set as required, the
programming equipment may then read the corre-
sponding identifier code on DQ7–DQ0.
To access the autoselect codes in-system, the host
system can issue the autoselect command via the
command register, as shown in Table 5. This method
does not require VID. See “Command Definitions” for
details on using the autoselect mode.
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Description
Table 4. Am29LV400 Autoselect Codes (High Voltage Method)
A17 A11
A8
A5
to to to to
Mode CE# OE# WE# A12 A10 A9 A7 A6 A2 A1 A0
Manufacturer ID: AMD
L L H X X VID X L X L L
Device ID:
Word L L H
Am29LV400
(Top Boot Block)
Byte L
X X VID X L X L H
LH
Device ID:
Am29LV400
(Bottom Boot
Block)
Word L L H
X X VID X L X L H
Byte L L H
Sector Protection Verification L L H SA X VID X L X H L
DQ8
to
DQ15
X
22h
X
22h
DQ7
to
DQ0
01h
B9h
B9h
BAh
X BAh
X
01h
(protected)
X
00h
(unprotected)
L = Logic Low = VIL, H = Logic High = VIH, SA = Sector Address, X = Don’t care.
Sector Protection/Unprotection
The hardware sector protection feature disables both
program and erase operations in any sector. The hard-
ware sector unprotection feature re-enables both pro-
gram and erase operations in previously protected
sectors.
Sector protection/unprotection is implemented using
programming equipment, and requires VID on address
pin A9 and OE#. Publication number 20873 contains
further details; contact an AMD representative to re-
quest a copy.
The device is shipped with all sectors unprotected.
AMD offers the option of programming and protecting
sectors at its factory prior to shipping the device
through AMD’s ExpressFlash™ Service. Contact an
AMD representative for details.
It is possible to determine whether a sector is protected
or unprotected. See “Autoselect Mode” for details.
Temporary Sector Unprotect
This feature allows temporary unprotection of previ-
ously protected sectors to change data in-system. The
Sector Unprotect mode is activated by setting the RE-
SET# pin to VID. During this mode, formerly protected
sectors can be programmed or erased by selecting the
sector addresses. Once VID is removed from the RE-
SET# pin, all the previously protected sectors are
protected again. Figure 1 shows the algorithm, and
Figure 21 shows the timing diagrams, for this feature.
11 Am29LV400
11 Page | ||
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| PDF Descargar | [ Datasheet 29LV400BA.PDF ] | |
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