Altera Active Serial Memory Interface - Manual (Page 14)

Port Condition Size Descriptions
read_sid
Optional 1 bit Active-high port that executes the read silicon ID operation.
If asserted, the IP core proceeds to read the silicon ID of the
EPCS device, and the value of the silicon ID appears at the
epcs_id[7..0]
port.
read_status
Optional 1 bit Active-high port that executes the read EPCS/EPCQ/EPCQ-
L status register operation. If asserted, the IP core reads the
status register of the EPCS/EPCQ/EPCQ-L device, and
outputs the value at the
status_out[7..0]
port. You can
use the
read_status
port to determine which memory
sector on the EPCS/EPCQ/EPCQ-L device is read-only.
reset
Required 1 bit To reset all counters and registers in the Altera ASMI
Parallel IP core (not the EPCS/EPCQ/EPCQ-L devices), pull
the
reset
signal high for at least two clock cycles.
The
reset
signal is asserted regardless of busy status, hence,
do not assert the
reset
signal whenever the Altera ASMI
Parallel IP core is running.
After asserting the
reset
signal, allow two clock cycles to
reset the circuit before sending a new signal.
Default value of the reset port is 0.
sector_erase
Optional 1 bit Active-high port that executes the sector erase operation. If
asserted, the IP core starts erasing the memory sector on the
EPCS/EPCQ/EPCQ-L device based on the memory address
value at the
addr[23..0]
port. The value is a valid memory
address in the sector to be erased. For EPCQ256/EPCQ-
L256 or larger devices, the width of the
addr
and
read_
address
signals is 32 bit.
sector_protect
Optional 1 bit Active-high port that executes the sector protect operation.
If asserted, the IP core takes the value of the
datain[7..0]
port and writes to the EPCS/EPCQ/EPCQ-L status register.
The status register contains the block protection bits that
represent the memory sector to be protected.
shift_bytes
Optional 1 bit Active-high port that shifts data bytes during the write
operation. You must use this port together with the write
port during the page-write operation. The IP core samples
and shifts the data in the
datain[7..0]
port at the rising
edge of the
clkin
signal, as long as the
shift_bytes
signal
is asserted. Continue shifting the required bytes into the
EPCS/EPCQ/EPCQ-L device until the IP core finishes
sampling and storing the data internally.
14 Input Ports
UG-ALT1005
2014.12.15
Altera Corporation Altera ASMI Parallel IP Core User Guide
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