LH28F016SC-L datasheet(4/44 Pages) SHARP

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LH28F016SC-L/SCH-L

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PIN DESCRIPTION

SYMBOL

TYPE

NAME AND FUNCTION

A0-A20

INPUT

ADDRESS INPUTS : Inputs for addresses during read and write operations. Addresses

are internally latched during a write cycle.

INPUT/

DATA INPUT/OUTPUTS : Inputs data and commands during CUI write cycles; outputs

data during memory array, status register, and identifier code read cycles. Data pins

float to high-impedance when the chip is deselected or outputs are disabled. Data is

internally latched during a write cycle.

CE#

INPUT

CHIP ENABLE : Activates the device's control logic, input buffers, decoders, and sense

amplifiers. CE#-high deselects the device and reduces power consumption to standby

levels.

RESET/DEEP POWER-DOWN : Puts the device in deep power-down mode and resets

internal automation. RP#-high enables normal operation. When driven low, RP# inhibits

write operations which provide data protection during power transitions. Exit from deep

power-down sets the device to read array mode. RP# at VHH enables setting of the

master lock-bit and enables configuration of block lock-bits when the master lock-bit is

set. RP# = VHH overrides block lock-bits thereby enabling block erase and byte write

operations to locked memory blocks. Block erase, byte write, or lock-bit configuration

with VIH < RP# < VHH produce spurious results and should not be attempted.

OE#

INPUT

OUTPUT ENABLE : Gates the device's outputs during a read cycle.

WE#

INPUT

WRITE ENABLE : Controls writes to the CUI and array blocks. Addresses and data are

latched on the rising edge of the WE# pulse.

READY/BUSY : Indicates the status of the internal WSM. When low, the WSM is

performing an internal operation (block erase, byte write, or lock-bit configuration).

RY/BY#-high indicates that the WSM is ready for new commands, block erase is

suspended, and byte write is inactive, byte write is suspended, or the device is in deep

power-down mode. RY/BY# is always active and does not float when the chip is

deselected or data outputs are disabled.

BLOCK ERASE, BYTE WRITE, LOCK-BIT CONFIGURATION POWER SUPPLY : For

erasing array blocks, writing bytes, or configuring lock-bits. With VPP

≤ VPPLK, memory

contents cannot be altered. Block erase, byte write, and lock-bit configuration with an

invalid VPP (see Section 6.2.3 "DC CHARACTERISTICS") produce spurious results

and should not be attempted.

DEVICE POWER SUPPLY : Internal detection configures the device for 2.7 V , 3.3 V or

5 V operation. To switch from one voltage to another, ramp VCC down to GND and then

ramp VCC to the new voltage. Do not float any power pins. With VCC

≤ VLKO, all write

attempts to the flash memory are inhibited. Device operations at invalid VCC voltage

(see Section 6.2.3 "DC CHARACTERISTICS") produce spurious results and should

not be attempted. Block erase, byte write and lock-bit configuration operations with VCC

3.0 V are not supported.

GND

SUPPLY

GROUND : Do not float any ground pins.

NO CONNECT : Lead is not internal connected; recommend to be floated.

OUTPUT

DQ0-DQ7

RP#

INPUT

RY/BY#

OUTPUT

VPP

SUPPLY

VCC

SUPPLY

LH28F016SC-L Datasheet(PDF) 4 Page - Sharp Corporation

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