S29JL032J70TFI320 Datasheet, PDF (14/63 Pages) SPANSION – 32 Megabit (4M x 8-Bit/2M x 16-Bit) CMOS 3.0 Volt-Only, Simultaneous Read/Write Flash Memory

Data Sheet
8. Device Bus Operations
This section describes the requirements and use of the device bus operations, which are initiated through the
internal command register. The command register itself does not occupy any addressable memory location.
The register is a latch used to store the commands, along with the address and data information needed to
execute the command. The contents of the register serve as inputs to the internal state machine. The state
machine outputs dictate the function of the device. Table 8.1 lists the device bus operations, the inputs and
control levels they require, and the resulting output. The following subsections describe each of these
operations in further detail.
Table 8.1 S29JL032J Device Bus Operations
Operation
Read
Write
Standby
CE#
L
L
V_CC ±
0.3V
OE#
L
H
X
WE# RESET# WP#/ACC
H
H
L/H
L
H
(Note 3)
X
V_CC ±
0.3V
L/H
Addresses
(Note 1)
A_IN
A_IN
X
DQ15–DQ8
BYTE# = V_IH
BYTE# = V_IL
D_OUT
D_IN
DQ14–DQ8 = High-Z,
DQ15 = A-1
DQ7–DQ0
D_OUT
D_IN
High-Z
High-Z
High-Z
Output Disable
L
H
H
H
L/H
X
High-Z
High-Z
High-Z
Reset
X
X
X
L
L/H
X
High-Z
High-Z
High-Z
Sector Protect
(Note 2)
L
H
L
V_ID
L/H
SA, A6 = L,
A1 = H, A0 = L
X
X
D_IN
Sector Unprotect
(Note 2)
L
H
L
V_ID
(Note 3)
SA, A6 = H,
A1 = H, A0 = L
X
X
D_IN
Temporary Sector
Unprotect
X
X
X
V_ID
(Note 3)
A_IN
D_IN
High-Z
D_IN
Legend:
L = Logic Low = V_IL
H = Logic High = V_IH
V_ID = 8.5–12.5V
V_HH = 9.0 ± 0.5V
X = Don’t Care
SA = Sector Address
A_IN = Address In
D_IN = Data In
D_OUT = Data Out
Notes:
1. Addresses are A20:A0 in word mode (BYTE# = V_IH), A20:A-1 in byte mode (BYTE# = V_IL).
2. The sector protect and sector unprotect functions may also be implemented via programming equipment. See Boot Sector/Sector Block
Protection and Unprotection on page 23.
3. If WP#/ACC = V_IL, the two outermost boot sectors remain protected. If WP#/ACC = V_IH, protection on the two outermost boot sectors
depends on whether they were last protected or unprotected using the method described in Boot Sector/Sector Block Protection and
Unprotection on page 23. If WP#/ACC = V_HH, all sectors will be unprotected.
8.1
Word/Byte Configuration
The BYTE# pin controls whether the device data I/O pins operate in the byte or word configuration. If the
BYTE# pin is set at logic ‘1’, the device is in word configuration, DQ15–DQ0 are active and controlled by CE#
and OE#.
If the BYTE# pin is set at logic ‘0’, the device is in byte configuration, and only data I/O pins DQ7–DQ0 are
active and controlled by CE# and OE#. The data I/O pins DQ14–DQ8 are tri-stated, and the DQ15 pin is used
as an input for the LSB (A-1) address function.
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S29JL032J
S29JL032J_00_06 December 16, 2011