SA25C020LEMLF datasheet(13/31 Pages) ETC

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SA25C020 Advanced Information

SAIFUN

Signal Description

Chip Select (CSb)

This is an active-low input pin to the device

that is generated by the master controlling

the device. A low level on this pin selects

the device, while a high level deselects the

device. All serial communications with the

device are enabled only when this pin is

held low.

Serial Clock (SCK)

This is an input pin to the device that is

generated by the master controlling the

device.

clock

signal

that

synchronizes the communication between

a master and the device. All input

information (SI) to the device is latched on

the rising edge of this clock input, while

output data (SO) from the device is driven

after the falling edge of this clock input.

Serial Input (SI)

This is an input pin to the device that is

generated by the master controlling the

device.

The

master

transfers

input

information (instruction, addresses and the

data to be programmed) into the device

serially via this pin. This input information is

latched on the rising edge of the SCK.

Serial Output (SO)

This is an output pin from the device that is

used to transfer output data to the

controlling master. Output data is serially

shifted out on this pin after the falling edge

of the SCK.

Hold (HOLDb)

This is an active low input pin to the device

that is generated by the master controlling

the device. When driven low, this pin

suspends any current communication with

the device. The suspended communication

can be resumed by driving this pin high.

This feature eliminates the need to

re-transmit

the

entire

sequence

enabling the master to resume the

communication from where it was left off.

This pin should be tied high if this feature is

not

used.

Refer

to Hold Condition,

page 15, for additional details.

Write Protect (WPb)

This is an active low input pin to the device.

This pin allows enabling and disabling of

writes to the device's memory array and

status register. When this pin is held low,

writes to the memory array and status

they are enabled. Refer to Write Protect,

page 16, for additional details.

SA25C020LEMLF Datasheet(PDF) 13 Page - List of Unclassifed Manufacturers

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