s71ws256jc0 Meet Spansion Inc., s71ws256jc0 Datasheet - Page 70

• Manufacturer Part Number: s71ws256jc0
• Description: Stacked Multi-chip Product Mcp 128/64 Megabit 8m/4m X 16-bit Cmos 1.8 Volt-only, Simultaneous Read/write, Burst Mode Flash Memory With Cellularram
• Manufacturer: Meet Spansion Inc.

14.5
68
Autoselect Command Sequence
The autoselect command sequence allows the host system to access the manufacturer and device
codes, and determine whether or not a sector is protected.
on page 77
be written to an address within a bank that is either in the read or erase-suspend-read mode. The
autoselect command may not be written while the device is actively programming or erasing in
the other bank.
The autoselect command sequence is initiated by first writing two unlock cycles. This is followed
by a third write cycle that contains the bank address and the autoselect command. The bank then
enters the autoselect mode. No subsequent data will be made available if the autoselect data is
read in synchronous mode. The system may read at any address within the same bank any num-
ber of times without initiating another autoselect command sequence. Read commands to other
banks will return data from the array. The following table describes the address requirements for
the various autoselect functions, and the resulting data. BA represents the bank address, and SA
represents the sector address. The device ID is read in three cycles.
The system must write the reset command to return to the read mode (or erase-suspend-read
mode if the bank was previously in Erase Suspend).
Manufacturer ID
Device ID, Word 1
Device ID, Word 2
Device ID, Word 3
Sector Protection
Verification
Indicator Bits
Description
shows the address and data requirements. The autoselect command sequence may
(BA) + 00h
(BA) + 01h
(BA) + 0Eh
(BA) + 0Fh
(SA) + 02h
(BA) + 03h
Address
S29WS128J/064J
D a t a
1 = Locked, 0 = Not Locked
1 = Locked, 0 = Not Locked
0 = Standard Handshake
10 = Bottom Boot Sector
S h e e t
DQ6 -Customer Lock Bit
DQ4 & DQ3 - Boot Code
00 = Dual Boot Sector,
DQ7 - Factory Lock Bit
01 = Top Boot Sector,
DQ5 - Handshake Bit
DQ2 - DQ0 = 001
2218h (WS128J)
221Eh (WS064J)
2200h (WS128J)
2201h (WS064J)
0000 (unlocked)
DQ15 - DQ8 = 0
0001 (locked),
1 = Reserved,
Read Data
0001h
227Eh
Table 14.5, “Command Definitions,”
S29WS-J_M0_A4 June 24, 2005