am49bds640ah Meet Spansion Inc., am49bds640ah Datasheet - Page 76

• Manufacturer Part Number: am49bds640ah
• Description: Stacked Multichip Package Mcp , Flash Memory And Psram Cmos 1.8 Volt-only Simultaneous Read/write, Burst Mode 64 Megabit 4m ? 16-bit Flash Memory, And 16 Mbit 1m ? 16-bit Psram
• Manufacturer: Meet Spansion Inc.

AC CHARACTERISTICS
Note: Breakpoints in waveforms indicate that system may alternately read array data from the “non-busy bank” while checking
the status of the program or erase operation in the “busy” bank. The system should read status twice to ensure valid information.
74
Addresses
AVD#
WE#
Data
OE#
CE#
t
WPH
Command Sequence
PA/SA
t
AS
Last Cycle in
Sector Erase
Program or
t
WC
Figure 46. Back-to-Back Read/Write Cycle Timings
t
WP
PD/30h
t
A D V A N C E
t
AH
DS
t
t
t
OEH
DH
OE
t
RA
SR/W
t
ACC
Read status (at least two cycles) in same bank
Am49BDS640AH
t
RC
and/or array data from other bank
I N F O R M A T I O N
RD
t
OEZ
t
OEH
RA
t
RC
RD
t
command sequence
GHWL
write or program
555h
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December 5, 2003
t
WC
AAh