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PDF A29L400A Data sheet ( Hoja de datos )
| Número de pieza | A29L400A | |
| Descripción | 512K X 8 Bit / 256K X 16 Bit CMOS 3.0 Volt-only | |
| Fabricantes | AMIC Technology | |
| Logotipo |  |
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Preliminary
A29L400A 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. History
0.0 Initial issue
Issue Date
July 24, 2005
Remark
Preliminary
www.DataSheet4U.com
PRELIMINARY (July, 2005, Version 0.0)
AMIC Technology, Corp.
1 page  
Block Diagram
VCC
VSS
RY/BY
RESET
WE
BYTE
CE
OE
State
Control
Command
Register
A0-A17
VCC Detector
A29L400A 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
www.DataSheet4U.com
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
PRELIMINARY (July, 2005, Version 0.0)
4
AMIC Technology, Corp.
5 Page 
A29L400A 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
www.DataSheet4U.com
PLSCNT
=25?
No
Read from
sector address
with A6=0,
A1=1, A0=0
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
PRELIMINARY (July, 2005, Version 0.0)
10
AMIC Technology, Corp.
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet A29L400A.PDF ] | |
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