3–6 Chapter 3: Parameter Settings
Internal Memory (RAM and ROM) June 2014 Altera Corporation
User Guide
When you select With one read port and one
write port, the following option is available:
Create a ‘rden’ read enable signal
— Off
Specifies whether to create a
read enable signal for port B.
For more information, refer to
“Read Enable” on page 4–15.
When you select With two read/write ports,
the following option is available:
Create a ‘rden_a’ and ‘rden_b’ read enable
signal
Specifies whether to create a
read enable signal for port A and
B.
For more information, refer to
“Read Enable” on page 4–15.
Create byte enable for port A
— Off
Specifies whether to create a
byte enable for port A and B.
Turn on these options if you want
to mask the input data so that
only specific bytes, nibbles, or
bits of data are written.
The option to create a byte
enable for port B is only available
when you select two read/write
ports.
For more information, refer to
“Byte Enable” on page 4–13.
Create byte enable for port B
Enable error checking and correcting (ECC) to
check and correct single bit errors and detect
double errors
On/Off Off
Specifies whether to enable the
ECC feature that corrects single
bit errors and detects double
errors at the output of the
memory.
This option is only available in
devices that support M144K
memory block type.
For more information, refer to
“Error Correction Code” on
page 4–19.
Enable error checking and correcting (ECC) to
check and correct single bit errors, double
adjacent bit errors, and detect triple adjacent
bit errors
On/Off Off
Specifies whether to enable the
ECC feature that corrects single
bit errors, double adjacent bit
errors, and detects triple
adjacent bit errors at the output
of the memory.
This option is only available in
devices that support M20K
memory block type.
For more information, refer to
“Error Correction Code” on
page 4–19.
Table 3–2. RAM:2-Port Parameter Settings
Option Legal Values
Default
values
Description