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PDF A29L400B Data sheet ( Hoja de datos )
| Número de pieza | A29L400B | |
| Descripción | Boot Sector Flash Memory | |
| Fabricantes | AMIC | |
| Logotipo |  |
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A29L400B Series
512K X 8 Bit / 256K X 16 Bit CMOS 3.0 Volt-only,
Boot Sector Flash Memory
Document Title
512K X 8 Bit / 256K X 16 Bit CMOS 3.0 Volt-only, Boot Sector Flash Memory
Revision History
Rev. No.
0.0
1.0
1.1
History
Initial issue
Update ICC1~ICC5, VID, Absolute Maximum Rating, Program/Erase Time,
Data Retention, Regulated Voltage Range
Page 6 “Writing Commands/Command Sequences” section :
Change
The “Word/Byte Program Command Sequence” section has details on
programming data to the device using both standard and Unlock Bypass
command sequence.
Into
The “Word/Byte Program Command Sequence” and “Unlock Bypass
Command Sequence” has detail descriptions on programming data to
the device using both standard and Unlock Bypass command sequence.
Issue Date
May 28, 2013
June 10, 2014
August 5, 2014
Remark
Preliminary
Final
(August, 2014, Version 1.1)
AMIC Technology, Corp.
1 page  
Block Diagram
VCC
VSS
RY/BY
RESET
WE
BYTE
CE
OE
State
Control
Command
Register
A0-A17
VCC Detector
A29L400B Series
Sector Switches
Erase Voltage
Generator
I/O0 - I/O15 (A-1)
Input/Output
Buffers
PGM Voltage
Generator
Chip Enable
Output Enable
Logic
STB Data Latch
Timer
STB
Y-Decoder
X-decoder
Y-Gating
Cell Matrix
Pin Descriptions
Pin No.
A0 - A17
I/O0 - I/O14
I/O15 (A-1)
I/O15
A-1
CE
WE
OE
RESET
BYTE
RY/ BY
VSS
VCC
NC
Description
Address Inputs
Data Inputs/Outputs
Data Input/Output, Word Mode
LSB Address Input, Byte Mode
Chip Enable
Write Enable
Output Enable
Hardware Reset
Selects Byte Mode or Word Mode
Ready/ BUSY - Output
Ground
Power Supply
Pin not connected internally
(August, 2014, Version 1.1)
4 AMIC Technology, Corp.
5 Page 
A29L400B Series
START
PLSCNT=1
RESET=VID
Wait 1 us
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
START
PLSCNT=1
RESET=VID
Wait 1 us
Temporary Sector No
Unprotect Mode
First Write
Cycle=60h?
Yes
Set up sector
address
Sector Protect
Write 60h to sector
address with A6=0,
A1=1, A0=0
No First Write No Temporary Sector
Cycle=60h?
Unprotect Mode
Yes
All sectors
protected?
Yes
Set up first sector
address
Increment
PLSCNT
Wait 150 us
Verify Sector
Protect: Write 40h
to sector address
with A6=0, A1=1,
A0=0
Reset
PLSCNT=1
No
PLSCNT
=25?
Read from
sector address
with A6=0,
A1=1, A0=0
No
Data=01h?
Yes
Device failed
Yes
Protect another
sector?
No
Remove VID
from RESET
Sector Protect
Algorithm
Write reset
command
Sector Protect
complete
Yes
Sector Unprotect:
Write 60h to sector
address with A6=1,
A1=1, A0=0
Increment
PLSCNT
Wait 500 ms
Verify Sector
Unprotect : Write
40h to sector
address with A6=1,
A1=1, A0=0
No
PLSCNT=
1000?
Read from sector
address with A6=1,
A1=1, A0=0
No
Data=00h?
Set up
next sector
address
Yes
Device failed
Yes
Last sector
verified?
No
Sector Unprotect
Algorithm
Yes
Remove VID
from RESET
Write reset
Command
Sector Unprotect
complete
Figure 2. In-System Sector Protect/Unprotect Algorithms
(August, 2014, Version 1.1)
10 AMIC Technology, Corp.
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet A29L400B.PDF ] | |
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