Altera Internal Memory (RAM and ROM) IP Core - Manual (Page 5)

Supported Memory Operation Modes
This table lists the supported memory operation mode and the related IP core for each operation mode.
Table 1-2: Supported Memory Operation Modes
Memory Operation Mode Related IP Core Description
Single-port RAM RAM: 1-PORT IP
Core
Single-port mode supports non-simultaneous read and write
operations from a single address.
Use the read enable port to control the RAM output ports
behavior during a write operation:
• To show either the new data being written or the old data
at that address, activate the read enable during a write
operation.
• To retain the previous values that are held during the
most recent active read enable, perform the write
operation with the read enable port deasserted.
Simple dual-port
RAM
RAM: 2-PORT IP
Core
You can simultaneously perform one read and one write
operations to different locations where the write operation
happens on port A and the read operation happens on port
B.
True dual-port RAM RAM: 2-PORT IP
Core
You can perform any combination of two port operations:
• two reads, two writes, or,
• one read and one write at two different clock frequencies.
Single-port ROM ROM: 1-PORT IP
Core
Only one address port is available for read operation.
You can use the memory blocks as a ROM.
• Initialize the ROM contents of the memory blocks using
a .mif or .hex file.
• The address lines of the ROM are registered.
• The outputs can be registered or unregistered.
• The ROM read operation is identical to the read
operation in the single-port RAM configuration.
Dual-port ROM ROM: 2-PORT IP
Core
The dual-port ROM has almost similar functional ports as
single-port ROM. The difference is dual-port ROM has an
additional address port for read operation.
You can use the memory blocks as a ROM.
• Initialize the ROM contents of the memory blocks using
a .mif or .hex file.
• The address lines of the ROM are registered.
• The outputs can be registered or unregistered.
• The ROM read operation is identical to the read
operation in the single-port RAM configuration.
1-2 Supported Memory Operation Modes
UG-01068
2014.12.17
Altera Corporation About RAM: 1-PORT, RAM: 2-PORT, ROM: 1-PORT, and ROM: 2-PORT IP Cores
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