P R E L I M I N A R Y
Table 3. Device Bus Operations—Flash Byte Mode, CIOf = VSS; SRAM Word Mode, CIOs = VCC
Operation
(Notes 1, 2)
LB#s
(Note 3) (Note 3)
UB#s
WP#/ACC DQ7– DQ15–
CE#f CE1#s CE2s OE# WE# SA
Addr.
RESET#
(Note 4)
DQ0
DQ8
H
X
H
X
H
X
X
L
X
L
X
L
Read from Flash
Write to Flash
Standby
L
L
H
X
H
X
H
L
X
X
X
X
X
AIN
X
X
X
X
X
X
H
L/H
DOUT
High-Z
L
AIN
X
H
(Note 3)
H
DIN
High-Z
VCC
0.3 V
±
VCC ±
0.3 V
X
H
X
High-Z High-Z
High-Z High-Z
High-Z High-Z
L
X
L
Output Disable
L
L
H
X
H
L/H
X
H
X
H
X
L
Flash Hardware
Reset
X
L
X
X
X
X
L
L/H
X
SADD,
A6 = L,
A1 = H,
A0 = L
Sector Protect
(Note 5)
H
L
X
X
VID
L/H
DIN
X
X
H
X
L
X
L
SADD,
A6 = L,
A1 = H,
A0 = L
Sector
Unprotect
(Note 5)
L
X
H
H
X
L
L
X
H
X
X
X
X
X
X
X
VID
VID
H
(Note 6)
(Note 6)
X
DIN
X
Temporary
Sector
Unprotect
H
X
x
AIN
DIN
High-Z
L
L
H
L
L
L
DOUT
High-Z
DOUT
DIN
DOUT
DOUT
High-Z
DIN
Read from
SRAM
L
L
H
H
AIN
H
L
L
Write to SRAM
H
X
L
X
AIN
H
L
L
H
X
High-Z
DIN
DIN
H
High-Z
Legend: L = Logic Low = VIL, H = Logic High = VIH, VID = 11.5–12.5 V, VHH = 9.0 ± 0.5 V, X = Don’t Care, SA = SRAM Address
Input, Byte Mode, SADD = Flash Sector Address, AIN = Address In (for Flash Byte Mode, DQ15 = A-1), DIN = Data In, DOUT
Data Out
=
Notes:
1. Other operations except for those indicated in this column are inhibited.
2. Do not apply CE#f = VIL, CE1#s = VIL and CE2s = VIH at the same time.
3. Don’t care or open LB#s or UB#s.
4. If WP#/ACC = VIL, the boot sectors will be protected. If WP#/ACC = VIH the boot sectors protection will be removed.
If WP#/ACC = VACC (9V), the program time will be reduced by 40%.
5. The sector protect and sector unprotect functions may also be implemented via programming equipment. See the “Sector/Sector
Block Protection and Unprotection” section.
6. If WP#/ACC = VIL, the two outermost boot sectors remain protected. If WP#/ACC = VIH, the two outermost boot sector protection
depends on whether they were last protected or unprotected using the method described in “Sector/Sector Block Protection and
Unprotection”. If WP#/ACC = VHH, all sectors will be unprotected.
September 5, 2002
Am41DL32x8G
13
AMD [ AMD ]
