am42bds640ag Meet Spansion Inc., am42bds640ag Datasheet - Page 47

• 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.

AC CHARACTERISTICS
Notes:
1. Figure shows total number of wait states set to seven cycles. The total number of wait states can be programmed from two
2. If any burst address occurs at a 64-word boundary, one additional clock cycle is inserted, and is indicated by RDY.
3. The device is in synchronous mode.
4. This waveform represents a synchronous burst mode, the device will also operate in reduced wait-state handshaking under
46
DQ15-DQ0
cycles to seven cycles. Clock is set for active rising edge.
a CLK synchronous burst mode.
A21-A0
AVD#
CE#f
CLK
OE#
RDY
Hi-Z
t
AAS
Aa
t
AVC
t
CAS
Figure 17. Reduced Wait-State Handshaking Burst Mode Read
t
AVD
t
AAH
1
t
OE
2
7 cycles for initial access shown.
Starting at an Odd Address
P R E L I M I N A R Y
3
t
t
IACC
ACC
Am42BDS640AG
4
5
6
7
t
RACC
8
t
RDYS
Da
t
BDH
Da + 1
t
BACC
November 1, 2002
t
CEZ
Da + n
t
OEZ
Hi-Z
Hi-Z