SMART 3 ADVANCED BOOT BLOCK
E
Name and Function
The pin descriptions table details the usage of each device pin.
Table 2. Smart 3 Advanced Boot Block Pin Descriptions
Symbol
A
0
–A
21
Type
INPUT
ADDRESS INPUTS
for memory addresses. Addresses are internally
latched during a program or erase cycle.
28F008B3: A[0-19], 28F016B3: A[0-20], 28F032B3: A[0-21],
28F800B3: A[0-17], 28F800B3: A[0-18], 28F160B3: A[0-19],
28F320B3: A[0-20]
DATA INPUTS/OUTPUTS:
Inputs array data on the second CE# and
WE# cycle during a Program command. Inputs commands to the
Command User Interface when CE# and WE# are active. Data is
internally latched. Outputs array, identifier and status register data. The
data pins float to tri-state when the chip is de-selected or the outputs are
disabled.
DATA INPUTS/OUTPUTS:
Inputs array data on the second CE# and
WE# cycle during a Program command. Data is internally latched.
Outputs array and identifier data. The data pins float to tri-state when the
chip is de-selected.
Not included on x8 products.
CHIP ENABLE:
Activates the internal control logic, input buffers,
decoders and sense amplifiers. CE# is active low. CE# high de-selects
the memory device and reduces power consumption to standby levels.
OUTPUT ENABLE:
Enables the device’s outputs through the data
buffers during a read operation. OE# is active low.
WRITE ENABLE:
Controls writes to the Command Register and memory
array. WE# is active low. Addresses and data are latched on the rising
edge of the second WE# pulse.
RESET/DEEP POWER-DOWN:
Uses two voltage levels (V
IL
, V
IH
) to
control reset/deep power-down mode.
When RP# is at logic low, the device is in reset/deep power-down
mode,
which drives the outputs to High-Z, resets the Write State
Machine, and minimizes current levels (I
CCD
).
When RP# is at logic high, the device is in standard operation.
When RP# transitions from logic-low to logic-high, the device resets all
blocks to locked and defaults to the read array mode.
DQ
0
–DQ
7
INPUT/OUTPUT
DQ
8
–DQ
15
INPUT/OUTPUT
CE#
INPUT
OE#
WE#
INPUT
INPUT
RP#
INPUT
WP#
INPUT
WRITE PROTECT:
Provides a method for locking and unlocking the two
lockable parameter blocks.
When WP# is at logic low, the lockable blocks are locked,
preventing program and erase operations to those blocks. If a program
or erase operation is attempted on a locked block, SR.1 and either SR.4
[program] or SR.5 [erase] will be set to indicate the operation failed.
When WP# is at logic high, the lockable blocks are unlocked
and
can be programmed or erased.
See Section 3.3 for details on write protection.
10
PRELIMINARY
INTEL [ INTEL CORPORATION ]
