Publication Number S29WSxxxN_00
Revision F Amendment 0 Issue Date October 29, 2004
General Description
The Spansion S29WS256/128/064N are MirrorbitTM Flash products fabricated on 110 nm process technology. These burst
mode Flash devices are capable of performing simultaneous read and write operations with zero latency on two separate
banks using separate data and address pins. They operate up to 80 MHz and use a single VCC of 1.7–1.95 volts that
makes them ideal for today’s demanding wireless applications requiring higher density, better performance and lowered
power consumption.
Distinctive Characteristics
Single 1.8 V read/program/erase (1.70–1.95 V)
110 nm MirrorBit Technology
Simultaneous Read/Write operation with zero
latency
32-word Write Buffer
Sixteen-bank architecture consisting of 16/8/4
Mbit for WS256N/128N/064N, respectively
Four 16 Kword sectors at both top and bottom of
memory array
254/126/62 64 Kword sectors (WS256N/128N/
064N)
Programmable burst read modes
— Linear for 32, 16 or 8 words linear read with or
without wrap-around
— Continuous sequential read mode
SecSi (Secured Silicon) Sector region consisting
of 128 words each for factory and customer
20-year data retention (typical)
Cycling Endurance: 100,000 cycles per sector
(typical)
RDY output indicates data available to system
Command set compatible with JEDEC standards
Hardware (WP#) protection of top and bottom
sectors
Dual boot sector configuration (top and bottom)
Offered Packages
— WS064N: 80-ball FBGA (7 mm x 9 mm)
— WS256N/128N: 84-ball FBGA (8 mm x 11.6 mm)
Low VCC write inhibit
Persistent and Password methods of Advanced
Sector Protection
Write operation status bits indicate program and
erase operation completion
Suspend and Resume commands for Program and
Erase operations
Unlock Bypass program command to reduce
programming time
Synchronous or Asynchronous program operation,
independent of burst control register settings
ACC input pin to reduce factory programming time
Support for Common Flash Interface (CFI)
Industrial Temperature range (contact factory)
Performance Characteristics
S29WSxxxN MirrorBit Flash Family
S29WS256N, S29WS128N, S29WS064N
256/128/64 Megabit (16/8/4 M x 16-Bit) CMOS 1.8 Volt-only
Simultaneous Read/Write, Burst Mode Flash Memory
Data Sheet
PRELIMINARY
Read Access Times
Speed Option (MHz)
806654
Max. Synch. Latency, ns (tIACC)
696969
Max. Synch. Burst Access, ns (tBACC)
9
11.2
13.5
Max. Asynch. Access Time, ns (tACC)
707070
Max CE# Access Time, ns (tCE)
707070
Max OE# Access Time, ns (tOE)
11.2
13.5
Current Consumption (typical values)
Continuous Burst Read @ 66 MHz
35 mA
Simultaneous Operation (asynchronous)
50 mA
Program (asynchronous)
19 mA
Erase (asynchronous)
19 mA
Standby Mode (asynchronous)
20 A
Typical Program & Erase Times
Single Word Programming
40 s
Effective Write Buffer Programming (VCC) Per Word
9.4 s
Effective Write Buffer Programming (VACC) Per Word
6 s
Sector Erase (16 Kword Sector)
150 ms
Sector Erase (64 Kword Sector)
600 ms