am42bds640ag Meet Spansion Inc., am42bds640ag Datasheet - Page 13

• Manufacturer Part Number: am42bds640ag
• Description: 64 Megabit 4 M ? 16-bit Cmos 1.8 Volt-only, Simultaneous Operation, Burst Mode Flash Memory And 16 Mbit 1 M ? 16-bit Static Ram Preliminary
• Manufacturer: Meet Spansion Inc.

Legend: L = Logic Low = V
Notes:
1.
2. Do not apply CE#f = V
3. Either CE1#s = V
4. X = Don’t care or open LB#s or UB#s.
5. Default edge of CLK is the rising edge.
12
Asynchronous Read from Flash,
Addresses Latched
Asynchronous Read from Flash,
Addresses Steady State
Asynchronous Write to Flash
Synchronous Write to Flash
CE# Standby
Output Disable
Hardware Reset
Read from SRAM
Wirte to SRAM
Flash Burst Read Operations
Load Starting Burst Address
Advance Burst to next address with
appropriate Data presented on the
Data Bus
Terminate current Burst read cycle
Terminate current Burst read cycle
via RESET#
Terminate current Burst read cycle
and start new Burst read cycle
Other operations except for those indicated in this column are
inhibited.
time.
these conditions is true, the other CE input is don’t care.
= Active edge of CLK,
Operation
IH
or CE2s = V
IL
IL
, CE1#s = V
, H = Logic High = V
= Pulse Low,
IL
will disable the SRAM. If one of
CE#f
H
H
H
H
IL
L
L
L
L
L
X
L
L
X
L
and CE2s = V
CE1#s CE2s
H
H
H
H
H
H
H
H
H
H
H
H
H
IH
L
L
(Note 3)
, V
Table 1. Device Bus Operations
ID
= 9–11 V, V
= Rising edge of Pulse Low
P R E L I M I N A R Y
IH
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
at the same
Am42BDS640AG
OE#
H
H
X
H
X
X
X
X
X
X
L
L
L
L
HH
= 9.0 ± 0.5 V, X = Don’t Care, A
WE#
H
H
H
H
H
H
H
H
H
L
L
X
X
L
6. The sector protect and sector unprotect functions may also be
7. If ACC = V
8.
Addr In
[21–0]
HIGH
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
A
A
A
A
A
A
A
Z
IN
IN
IN
IN
IN
IN
implemented via programming equipment. See the
Lock/Unlock Command
If WP# = V
boot) are protected. If WP# = V
aforementioned sectors depends on whether they were last
protected or unprotected using the method described in
Lock/Unlock Command Sequence”
floating or unconnected.
[15–8]
D
D
Hi-Z
Hi-Z
Hi-Z
HI-Z
DQ
D
D
OUT
OUT
IN
IN
Data Out
IL
Burst
HH
Hi-Z
Hi-Z
Hi-Z
, sectors 0,1 (bottom boot) or sectors 132, 133 (top
I/O
I/O
I/O
I/O
I/O
X
, all sectors will be protected.
[7–0]
D
D
Hi-Z
Hi-Z
Hi-Z
Hi-Z
DQ
D
D
OUT
OUT
IN
IN
IN
= Address In, D
LB#s UB#s
Sequence”section.
X
X
X
X
X
X
X
H
H
X
X
X
X
X
L
L
L
L
L
(Note 4)
IH
, the protection applied to the
X
X
X
X
X
X
X
H
H
X
X
X
X
X
L
L
L
L
L
. Note that WP# must not be left
IN
= Data In, D
RESET#
November 1, 2002
H
H
H
H
H
H
H
H
H
H
H
H
L
L
OUT
CLK
“Sector
X
X
X
X
X
X
X
X
X
X
“Sector
= Data Out
AVD#
H
X
X
X
X
X
X
X
L
L