Altera Parallel Flash Loader IP User Manual
Page 46
Pin
Description
Weak Pull-
Up
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.
46
Signals
UG-01082
2015.01.23
Altera Corporation
Parallel Flash Loader IP Core User Guide