Altera Parallel Flash Loader IP Manuel d'utilisateur télécharger pdf (Page 46)

Pin Description Weak Pull-

Function

flash_nce[] Output — Connects to the nCE pin of the flash memory

device. A low signal enables the flash

memory device. Use this pin for multiple

flash memory device support. The flash_

nce pin is connected to each nCE pin of all

the connected flash memory devices. The

width of this port depends on the number of

flash memory devices in the chain.

flash_nwe Output — Connects to the nWE pin of the flash memory

device. A low signal enables write operation

to the flash memory device.

flash_noe Output — Connects to the nOE pin of the flash memory

device. A low signal enables the outputs of

the flash memory device during a read

operation.

flash_clk Output — Used for burst mode. Connects to the CLK

input pin of the flash memory device. The

active edges of CLK increment the flash

memory device internal address counter.

The flash_clk frequency is half of the pfl_

clk frequency in burst mode for single CFI

flash. In dual P30 or P33 CFI flash solution,

the flash_clk frequency runs at a quarter of

the pfl_clk frequency. Use this pin for burst

mode only. Do not connect these pins from

the flash memory device to the CPLD device

if you are not using burst mode.

flash_nadv

Output — Used for burst mode. Connects to the

address valid input pin of the flash memory

device. Use this signal for latching the start

address. Use this pin for burst mode only.

Do not connect these pins from the flash

memory device to the CPLD device if you

are not using burst mode.

flash_nreset Output — Connects to the reset pin of the flash

memory device. A low signal resets the flash

memory device.

fpga_data[] Output — Data output from the flash to the FPGA

device during configuration. For PS mode,

this is a 1-bit bus fpga_data[0] data line.

For FPP mode, this is an 8-bit fpga_

data[7..0] data bus. This pins are not

available for the flash programming option

in the PFL IP core.

Signals

UG-01082

2015.01.23

Altera Corporation

Parallel Flash Loader IP Core User Guide

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Altera Parallel Flash Loader IP Manuel d'utilisateur Page 46

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