S29JL064J70TFI000 Datasheet, PDF (21/61 Pages) SPANSION – CMOS 3.0 Volt-Only, Simultaneous Read/Write Flash Memory

Data Sheet
8.9
Autoselect Mode
The autoselect mode provides manufacturer and device identification, and sector protection verification,
through identifier codes output on DQ7–DQ0. This mode is primarily intended for programming equipment to
automatically match a device to be programmed with its corresponding programming algorithm. However, the
autoselect codes can also be accessed in-system through the command register.
When using programming equipment, the autoselect mode requires V_ID on address pin A9. Address pins
must be as shown in Table 8.5. In addition, when verifying sector protection, the sector address must appear
on the appropriate highest order address bits (see Table 8.3 on page 20). Table 8.5 shows the remaining
address bits that are don’t care. When all necessary bits have been set as required, the programming
equipment may then read the corresponding identifier code on DQ7–DQ0. However, the autoselect codes
can also be accessed in-system through the command register, for instances when the S29JL064J is erased
or programmed in a system without access to high voltage on the A9 pin. The command sequence is
illustrated in Table 10.1 on page 36. Note that if a Bank Address (BA) on address bits A21, A20, and A19 is
asserted during the third write cycle of the autoselect command, the host system can read autoselect data
from that bank and then immediately read array data from another bank, without exiting the autoselect mode.
To access the autoselect codes in-system, the host system can issue the autoselect command via the
command register, as shown in Table 10.1 on page 36. This method does not require V_ID. Refer to
Autoselect Command Sequence on page 32 for more information.
Table 8.5 S29JL064J Autoselect Codes, (High Voltage Method)
Description
Manufacturer ID:
Spansion Products
A21
to
CE# OE# WE# A12
L
L
H BA
A11
A8
A5
DQ15 to DQ8
to
to
to
BYTE# BYTE#
A10 A9 A7 A6 A4 A3 A2 A1 A0 = V_IH = V_IL
X V_ID X
L
X
L
L
L
L
X
X
DQ7
to
DQ0
01h
Read Cycle 1
L
L L L H 22h
7Eh
Read Cycle 2 L
L
H BA
X V_ID X L X H H H L
22h
X
02h
Read Cycle 3
L
H H H H 22h
01h
Sector Protection
Verification
L
L
H
SA
X V_ID X
L
X
L
L
H
L
X
X
01h (protected),
00h (unprotected)
Secured Silicon
Indicator Bit (DQ6,
L
L
H BA
X V_ID X
L
X
L
L
HH
X
DQ7)
81h (Factory Locked),
X
41h (Customer
Locked),
01h (Not Locked)
Legend
L = Logic Low = V_IL
H = Logic High = V_IH
BA = Bank Address
SA = Sector Address
X = Don’t care.
December 16, 2011 S29JL064J_00_05
S29JL064J
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