October 2000
AS29LV800
®
Command format
Required
1st bus cycle
2nd bus cycle
3rd bus cycle
4th bus cycle
5th bus cycle
6th bus cycle
Command
sequence
bus write
cycles
Address
Data
F0h
Address
Data
Address
Data
Address
Data
Address Data Address
Data
Read
Address
Read
Data
Reset/Read
1
3
XXXh
×16
×8
555h
2AAh
555h
555h
Reset/
Read
Read
Data
AAh
AAh
AAh
55h
55h
55h
F0h
90h
90h
Read Address
AAAh
AAAh
01h
Device code
22DAh (T)
225Bh (B)
×16
×8
555h
2AAh
555h
555h
02h
Device code
DAh (T)
5Bh (B)
AAAh
AAAh
×16
×8
555h
2AAh
555h
555h
0052h
52h
00h
MFR code
Autoselect
ID Read
AAAh
AAAh
3
XXX02h
Sector
protection
0001h = protected
0000h =
unprotected
×16
×8
555h
2AAh
555h
555h
AAh
55h
90h
XXX04h
Sector
protection
0001h=protected
0000h=unprotected
AAAh
AAAh
×16
×8
555h
AAAh
555
2AAh
555h
2AA
555
555h
AAAh
555
Program
Address
Program
Data
Program
4
3
AAh
AAh
55h
55h
A0h
20h
×16
×8
Unlock
bypass
AAA
AAA
Unlock bypass
program
Program Program
2
2
XXX
A0h
90h
address
data
Unlock bypass reset
XXX
555h
XXX
2AAh
555h
2AAh
555h
00h
×16
555h
AAAh
555h
AAAh
555h
AAAh
555h
2AAh
555h
Chip
6
6
AAh
AAh
55h
55h
80h
80h
AAh
55h
55h
10h
30h
Erase
×8
AAAh
555h
555h
AAAh
×16
2AAh
Sector
Sector
Address
AAh
Erase
×8
AAAh
XXXh
XXXh
AAAh
555h
Sector Erase Suspend
Sector Erase Resume
1
1
B0h
30h
1
2
3
4
5
6
Bus operations defined in "Mode definitions," on page 3.
Reading from and programming to non-erasing sectors allowed in Erase Suspend mode.
Address bits A11-A18 = X = Don’t Care for all address commands except where Program Address and Sector Address are required.
Data bits DQ15-DQ8 are don’t care for unlock and command cycles.
The Unlock Bypass command must be initiated before the Unlock Bypass Program command.
The Unlock Bypass Reset command returns the device to reading array data when it is in the unlock bypass mode.
6
ALLIANCE SEMICONDUCTOR
DID 11-40002-A. 10/19/00
ANADIGICS [ ANADIGICS, INC ]
