F59L4G81A Datasheet, PDF (48/54 Pages) Elite Semiconductor Memory Technology Inc. – Voltage Supply: 3.3V (2.7V ~ 3.6V)

ESMT
F59L4G81A
Ready / Busy
The device has a R/ B output that provides a hardware method of indicating the completion of a page program, erase and random
read completion. The R/ B pin is normally high but transition to low after program or erase command is written to the command
register or random read is started after address loading. It returns to high when the internal controller has finished the operation. The
pin is an open-drain driver thereby allowing two or more R/ B outputs to be Or-tied. Because pull-up resistor value is related to tr (R/ B )
and current drain during busy (ibusy), an appropriate value can be obtained with the following reference chart (the following figure). Its
value can be determined by the following guidance.
Read / Busy Pin Electrical Specifications
Elite Semiconductor Memory Technology Inc.
Publication Date: May 2014
Revision: 1.3
48/54