Altera RAM Initializer - Manual (Page 34)

3–2 Confidential—Internal Use Only Altera Corporation
RAM Initializer (ALTMEM_INIT) Megafunction User Guide May 2008
Ports and Parameters
Figure 3–1. Input and Output Ports of the ALTMEM_INIT Megafunction
Table 3–1 shows the input ports, Table 3–2 shows the output ports, and
Table 3–3 shows the parameters for the ALTMEM_INIT megafunction.
Table 3–1. ALTMEM_INIT Megafunction Input Ports
Port Name Required Description Comments
clock Yes Write clock for RAM. Read clock for
ROM. —
clken No Clock enable port. Values are 0 (disabled) and 1
(enabled). If omitted, the default
value is 1.
datain[] No Data input from external ROM. Input port [(width–1)..0] wide. This
port is applicable in the
external-ROM mode only.
init Yes When asserted, this signal directs
the megafunction to begin initializing
from ROM. —
rom_data_ready No Input port for external-ROM mode. When the
PORT_ROM_DATA_READY
parameter value is set to
PORT_USED , the
rom_data_ready port is used in
the external-ROM mode. Assert this
signal for each word of data when the
ALTMEM_INIT megafunction is
ready to read the data.