A d v a n c e I n f o r m a t i o n
10.4 Autoselect
The Autoselect is used for manufacturer ID, Device identification, and sector protection informa-
tion. This mode is primarily intended for programming equipment to automatically match a device
with its corresponding programming algorithm. The Autoselect codes can also be accessed in-sys-
tem. When verifying sector protection, the sector address must appear on the appropriate highest
order address bits (see Table 10.10). The remaining address bits are don't care. The most signif-
icant four bits of the address during the third write cycle selects the bank from which the
Autoselect codes are read by the host. All other banks can be accessed normally for data read
without exiting the Autoselect mode.
To access the Autoselect codes, the host system must issue the Autoselect command.
The Autoselect command sequence may 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. Autoselect does not support simultaneous operations or burst mode.
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).
See Table 15.1 for command sequence details.
Table 10.10 Autoselect Addresses
Description
Manufacturer ID
Device ID, Word 1
Address
Read Data
(BA) + 00h 0001h
(BA) + 01h 227Eh
2230 (WS256N)
2231 (WS128N)
(BA) + 0Fh 2200
DQ15 - DQ8 = Reserved
Device ID, Word 2
Device ID, Word 3
(BA) + 0Eh
DQ7 (Factory Lock Bit): 1 = Locked, 0 = Not Locked
DQ6 (Customer Lock Bit): 1 = Locked, 0 = Not Locked
DQ5 (Handshake Bit): 1 = Reserved, 0 = Standard Handshake
DQ4, DQ3 (WP# Protection Boot Code): 00 = WP# Protects both Top Boot and
Bottom Boot Sectors. 01, 10, 11 = Reserved
Indicator Bits
(See Note)
(BA) + 03h
DQ2 = Reserved
DQ1 (DYB Power up State [Lock Register DQ4]): 1 = Unlocked (user option),
0 = Locked (default)
DQ0 (PPB Eraseability [Lock Register DQ3]): 1 = Erase allowed,
0 = Erase disabled
Sector Block Lock/
Unlock
(SA) + 02h 0001h = Locked, 0000h = Unlocked
Note: For WS128N and WS064, DQ1 and DQ0 are reserved.
Table 10.11 Autoselect Entry
(LLD Function = lld_AutoselectEntryCmd)
Cycle
Operation
Write
Byte Address
BAxAAAh
BAx555h
Word Address
BAx555h
Data
Unlock Cycle 1
Unlock Cycle 2
Autoselect Command
0x00AAh
0x0055h
0x0090h
Write
BAx2AAh
Write
BAxAAAh
BAx555h
32
S71WS-Nx0 Based MCPs
S71WS-N_01_A4 September 15, 2005
SPANSION [ SPANSION ]
