FLASH MEMORY

6

K9F6408U0C

K9F6408Q0C

PIN DESCRIPTION

Pin Name

Pin Function

DATA INPUTS/OUTPUTS

The I/O pins are used to input command, address and data, and to output data during read operations. The I/

O pins float to high-z when the chip is deselected or when the outputs are disabled.

CLE

COMMAND LATCH ENABLE

The CLE input controls the activating path for commands sent to the command register. When active high,

commands are latched into the command register through the I/O ports on the rising edge of the WE signal.

ALE

ADDRESS LATCH ENABLE

The ALE input controls the activating path for address to the internal address registers. Addresses are

latched on the rising edge of WE with ALE high.

CE

CHIP ENABLE

The CE input is the device selection control. When the device is in the Busy state, CE high is ignored, and

the device does not return to standby mode in program or erase operation. Regarding CE control during read

operation, refer to ’Page read’section of Device operation .

RE

READ ENABLE

The RE input is the serial data-out control, and when active drives the data onto the I/O bus. Data is valid

tREA after the falling edge of RE which also increments the internal column address counter by one.

WE

WRITE ENABLE

The WE input controls writes to the I/O port. Commands, address and data are latched on the rising edge of

the WE pulse.

WP

WRITE PROTECT

The WP pin provides inadvertent write/erase protection during power transitions. The internal high voltage

generator is reset when the WP pin is active low.

R/B

READY/BUSY OUTPUT

The R/B output indicates the status of the device operation. When low, it indicates that a program, erase or

random read operation is in process and returns to high state upon completion. It is an open drain output and

does not float to high-z condition when the chip is deselected or when outputs are disabled.

OUTPUT BUFFER POWER

Vcc

POWER

Vss

GROUND

N.C

NO CONNECTION

Lead is not internally connected.

GND

GND INPUT FOR ENABLING SPARE AREA

To do sequential read mode including spare area , connect this input pin to Vss or set to static low state

or to do sequential read mode excluding spare area , connect this input pin to Vcc or set to static high state .

DNU

DO NOT USE

Leave it disconnected.