Altera Active Serial Memory Interface Manuel d'utilisateur télécharger pdf (Page 10)

Parameter Legal Values Descriptions

Use ‘read_address’ port —

• This signal holds the address from which data is being

read. This signal works together with the

dataout[7..0]signal. As data appears on

dataout[7..0], the address from which the data byte

was read appears on the read-address output port. For

EPCQ256/EPCQ-L256 or larger devices, the width of

the addr and read_address signals is 32 bit. For other

devices, the width of the addr and read_address

signals is 24 bit.

• This option is available for all EPCS/EPCQ/EPCQ-L

devices.

Use 'ex4b_addr’ —

• To exit the 4-byte addressing mode when you use an

EPCQ256/EPCQ-L256 or larger devices, pull the

WREN signal high, followed by at least one clock cycle.

If WREN signal is zero, the 4-byte addressing mode

exit operation will not be carried out even though the

ex4b_addr is high. After the IP core receives the

command, the IP core asserts the busy signal to

indicate that the exit operation is in progress.

• Only applicable for EPCQ256/EPCQ-L256 or larger

devices.

Parameters

UG-ALT1005

2014.12.15

Altera Corporation

Altera ASMI Parallel IP Core User Guide

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Altera Active Serial Memory Interface Manuel d'utilisateur Page 10