March 2001
®
AS29LV800
Command format
Command sequence
Reset/Read
×16
Reset/Read
×8
×16
×8
Autoselect
ID Read
×16
3
×8
×16
×8
×16
Program
×8
×16
Unlock bypass
×8
Unlock bypass program
Unlock bypass reset
×16
Chip Erase
×8
×16
Sector Erase
×8
Sector Erase Suspend
Sector Erase Resume
1
1
6
AAAh
XXXh
XXXh
B0h
30h
6
AAAh
555h
AAh
555h
2
2
3
AAA
XXX
XXX
555h
AAh
555h
2AAh
55h
AAAh
A0h
90h
4
AAAh
555
AAh
555
Program
address
XXX
2AAh
55h
AAAh
555h
80h
AAAh
Program
data
00h
555h
80h
AAAh
555h
AAh
555h
555h
AAh
555h
2AAh
55h
2AAh
55h
AAAh
Sector
Address
30h
555h
10h
AAAh
555h
AAh
AAAh
555h
AAh
555h
2AA
55h
AAA
555h
2AAh
55h
AAAh
555
20h
3
AAAh
555h
AAh
AAAh
555h
AAh
555h
2AAh
55h
AAAh
555h
A0h
Program Address
Program Data
555h
2AAh
55h
AAAh
555h
90h
XXX04h
Sector protection
0001h=protected
0000h=unprotected
Required bus
write cycles
1
1st bus cycle
Address
XXXh
555h
AAh
Data
F0h
2nd bus cycle
Address
Read
Address
2AAh
55h
555h
2AAh
55h
Data
Read Data
3rd bus cycle
Address
Data
4th bus cycle
Address
Data
5th bus cycle
Address
Data
6th bus cycle
Address
Data
555h
F0h
AAAh
555h
90h
AAAh
555h
90h
02h
Device code
00h
MFR code
XXX02h
Sector protection
01h
Device code
Read Address
Read
Data
22DAh (T)
225Bh (B)
DAh (T) 5Bh
(B)
0052h
52h
0001h = protected
0000h = unprotected
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.
3/22/01; V.1.0
Alliance Semiconductor
P. 6 of 25
ANADIGICS [ ANADIGICS, INC ]
