Altera RAM Initializer - Manual (Page 36)

3–4 Confidential—Internal Use Only Altera Corporation
RAM Initializer (ALTMEM_INIT) Megafunction User Guide May 2008
Ports and Parameters
NUMWORDS Integer Yes Number of words stored in the ROM and the RAM.
ROM_READ_LATENCY Integer No Specifies the number of cycles to wait after the
ALTMEM_INIT megafunction sends a read address to the
ROM to initialize a read. The value of the
ROM_READ_LATENCY parameter must reflect the
latency in clock cycles induced by the registers in the
external ROM. For example, if the ROM has both its input
and output ports registered, set this parameter to 2. This
parameter is valid only in the external-ROM mode.
PORT_ROM_DATA_READY String No Specifies whether the rom_data_ready port is used.
Values are PORT_USED and PORT_UNUSED . If omitted,
the default value is PORT_UNUSED .
When the ALTMEM_INIT megafunction is in the
external-ROM mode and the
rom_data_ready input
port is used, set the PORT_ROM_DATA_READY
parameter to PORT_USED .
WIDTHAD Integer Yes Width of the ROM and the RAM.
WIDTH Integer Yes Data width of the ROM and the RAM.
Table 3–3. ALTMEM_INIT Megafunction Parameters (Part 2 of 2)
Parameter Name Type Required Description