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Related Information

• Serial Configuration Devices Datasheet

For more information about the block protection level for EPCQ devices. Every devices have different

block protection level.

• EPCQ-L Serial Configuration Devices Datasheet

For more information about the block protection level for EPCQ-L devices. Every devices have

different block protection level.

Read Data from the EPCS/EPCQ/EPCQ-L Device

Use the read signal to instruct the IP core to read data from the EPCS/EPCQ/EPCQ-L device. The Altera

ASMI Parallel IP core supports two types of read data operation: multiple-byte and single-byte read.

Figure 6: Reading Multiple-Byte

This figure shows an example of the latency when the Altera ASMI Parallel IP core is executing multiple-

byte read command. The latency shown does not correctly indicate the true processing time. It shows the

command only.

Figure 7: Reading Single-Byte

This figure shows an example of single-byte read command. The latency shown does not correctly

indicate the true processing time. It shows the command only.

The IP core registers the read signal on the rising edge of the clkin signal. After the IP core

receives the read command, it asserts the busy signal to indicate that the read command is in

progress.

Ensure that the read address appears on the addr[23..0] signal before asserting the read signal.

The rden signal must also be asserted to enable the read operation.

Read Data from the EPCS/EPCQ/EPCQ-L Device

UG-ALT1005

2014.12.15

Altera Corporation

Altera ASMI Parallel IP Core User Guide

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Altera Active Serial Memory Interface Manual de usuario Pagina 22