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參數(shù)資料
| 型號(hào)： | lpm-clshift |
| 廠(chǎng)商： | Altera Corporation |
| 英文描述： | Parameterized Combinatorial Logic Shifter or Barrel Shifter(參數(shù)確定的組合邏輯移位器或柱式移位器) |
| 中文描述： | 參數(shù)化組合邏輯移位或桶式移位器（參數(shù)確定的組合邏輯移位器或柱式移位器） |
| 文件頁(yè)數(shù)： | 38/48頁(yè) |
| 文件大小： | 293K |
| 代理商： | LPM-CLSHIFT |
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Altera Corporation
33
Storage Functions
lpm_rom
Parameterized Read-Only Memory
The
lpm_rom
function can be used as either
synchronous or asynchronous read-only
memory.
Ports
Parameters
Name
Type
Required
Description
address[]
Input
Input
Yes
No
Address input to the memory. This port is
LPM_WIDTHAD
wide.
Clock for input registers. The
address[]
port is synchronous (registered) when
the
inclock
port is connected, and is asynchronous (unregistered) when the
inclock
port is not connected.
Clock for output registers. The addressed memory content
q[]
response is
synchronous when the outclock port is connected, and is asynchronous when it
is not connected.
Memory enable input. High = data output on
q[]
, Low = high-impedance
outputs.
Memory output. This port is
LPM_WIDTH
wide.
inclock
outclock
Input
No
memenab
Input
No
q[]
Output
Yes
Name
Required
Value
Description
LPM_ADDRESS_CONTROL
No
"REGISTERED"
"UNREGISTERED"
"<filename>"
Controls whether the
address[]
port is registered. The
default value is
"REGISTERED"
.
Name of the MIF or Hex File containing ROM initialization
data ("<filename>").
In general, this value should be (but is not required to be)
2
LPM_WIDTHAD
–1
<
LPM_NUMWORDS
≤
2
LPM_WIDTHAD
. The
default value is 2
LPM_WIDTHAD
.
Controls whether the
q[]
port is registered. The default
value is
"REGISTERED"
.
Width of the
q[]
port.
Width of the
address[]
port.
LPM_WIDTHAD
should be
(but is not required to be) equal to log
2
(
LPM_NUMWORDS
). If
LPM_WIDTHAD
is too small, some memory locations will
not be addressable. If it is too large, the addresses that are
too high will return undefined logic levels.
LPM_FILE
Yes
LPM_NUMWORDS
No
Integer > 0
LPM_OUTDATA
No
"REGISTERED"
"UNREGISTERED"
Integer > 0
Integer > 0
LPM_WIDTH
Yes
Yes
LPM_WIDTHAD
LPM_ROM
address[]
inclock
outclock
memenab
LPM_ADDRESS_CONTROL=
LPM_FILE=
LPM_NUMWORDS=
LPM_OUTDATA="UNREGISTERED"
LPM_WIDTH=
LPM_WIDTHAD=
q[]
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| LPMM-S5 | 制造商:MISCELLANEOUS 功能描述: |
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