
Intel Advanced+ Boot Block Flash Memory (C3)
Datasheet
Intel Advanced+ Boot Block Flash Memory (C3)
May 2005
Order Number: 290645, Revision: 023
19
RP#
Input
RESET/DEEP POWER-DOWN:
Active-low input.
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 (ICCD).
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.
WE#
Input
WRITE ENABLE:
Active-low input. WE# controls writes to the device. Address and data are latched on
the rising edge of the WE# pulse.
WP#
Input
WRITE PROTECT:
Active-low input.
When WP# is a logic low, the lock-down mechanism is enabled and blocks marked lock-down cannot
be unlocked through software.
When WP# is logic high, the lock-down mechanism is disabled and blocks previously locked-down are
now locked and can be unlocked and locked through software. After WP# goes low, any blocks
previously marked lock-down revert to the lock-down state.
VPP
Input/
Power
PROGRAM/ERASE Power Supply:
Operates as an input at logic levels to control complete device
protection. Supplies power for accelerated Program and Erase operations in 12 V
± 5% range. Do not
leave this pin floating.
Lower VPP
≤ VPPLK to protect all contents against Program and Erase commands.
Set VPP = VCC for in-system Read, Program and Erase operations. In this configuration, VPP can
drop as low as 1.65 V to allow for resistor or diode drop from the system supply.
Apply VPP to 12 V
± 5% for faster program and erase in a production environment. Applying 12 V ± 5%
to VPP can only be done for a maximum of 1000 cycles on the main blocks and 2500 cycles on the
boot blocks. VPP can be connected to 12 V for a total of 80 hours maximum. See
Section 11.6 for
details on VPP voltage configurations.
VCC
Power
DEVICE CORE Power Supply:
Supplies power for device operations.
VCCQ
Power
OUTPUT Power Supply:
Output-driven source voltage. This ball can be tied directly to VCC if
operating within VCC range.
GND
Power
Ground:
For all internal circuitry. All ground inputs must be connected.
DU
—
Do Not Use:
Do not use this ball. This ball must not be connected to any power supplies, signals or
other balls,; it must be left floating.
NC
—
No Connect
Table 4.
Signal Descriptions
Symbol
Type
Description