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