am49dl640bg Meet Spansion Inc., am49dl640bg Datasheet - Page 57

• Manufacturer Part Number: am49dl640bg
• Description: 64 Mbit 8 M ? 8-bit/4 M ? 16-bit Cmos And 32 Mbit 512k ? 16-bit Pseudo Static Ram Preliminary
• Manufacturer: Meet Spansion Inc.

pSRAM AC CHARACTERISTICS
Notes:
1. If the device is using the I/Os to output data, input signals of reverse polarity must not be applied.
2. If OE# is high during the write cycle, the outputs will remain at high impedance.
56
Addresses
A0 to A20
I/O1 to 16
I/O1 to 16
UB#, LB#
CE#1
D
WE#
CE2
OUT
D
IN
t
CH
t
AS
High-Z
(Note 1)
Figure 32. Pseudo SRAM Write Cycle—
P R E L I M I N A R Y
UB#s and LB#s Control
t
BE
t
COE
Am49DL640BG
t
ODW
t
t
CW
WC
t
BW
t
WP
t
DS
Valid Data In
t
DH
t
WR
High-Z
March 8, 2002