分类： LINUX
2008-04-01 17:50:58
INPUT PORTS
| Port Name | Required | Description | Comments |
|---|---|---|---|
wren_a
| No | Write enable input. | The wren_a port is not available when the OPERATION_MODE parameter is set to "ROM" mode.
|
wren_b
| No | Write enable input. | The wren_b input port is available only when the OPERATION_MODE parameter is set to "BIDIR_DUAL_PORT".
|
rden_b
| No | Read enable input port. | The rden_b input port is available only when the OPERATION_MODE parameter is set to "DUAL_PORT" and when the RAM_BLOCK_TYPE parameter is not set to "MEGARAM".
|
data_a[]
| No | Data input port to the memory. | Input port WIDTH_A-1..0 wide.
|
data_b[]
| No | Data input port to the memory. | Input port WIDTH_B-1..0 wide.
|
address_a[]
| Yes | Address input to the memory. | Input port WIDTHAD_A-1..0 wide.
|
address_b[]
| Yes | Address input to the memory. | Input port WIDTHAD_B-1..0 wide.
|
clock0
| Yes | Clock input port for the RAM. | |
clock1
| No | Clock input port for the RAM. | |
clocken0
| No | Clock enable for clock0.
| |
clocken1
| No | Clock enable for clock1.
| |
aclr0
| No | The first asynchronous clear input. | |
aclr1
| No | The second asynchronous clear input. | |
byteena_a[]
| No | Byte enable input port. | Input port WIDTH_BYTEENA_A-1..0 wide. The byteena_a enable input port can be used only when the data_a port is at least two bytes wide.
|
byteena_b[]
| No | Byte enable input port. | Input port WIDTH_BYTEENA_B-1..0 wide. The byteena_b enable input port can be used only when the data_b port is at least two bytes wide. |
OUTPUT PORTS
| Port Name | Required | Description | Comments |
|---|---|---|---|
q_a[]
| Yes | Data output port from the memory. | Output port WIDTH_A-1..0 wide. The q_a[] port is legal only when the OPERATION_MODE parameter is set to "SINGLE_PORT", "BIDIR_DUAL_PORT", or "ROM".
|
q_b[]
| Yes | Data output port from the memory. | Output port WIDTH_B-1..0 wide. The q_b[] port is legal only when the OPERATION_MODE parameter is set to "DUAL_PORT" or "BIDIR_DUAL_PORT". |
| Parameter | Type | Required | Comments |
|---|---|---|---|
OPERATION_MODE
| String | Yes | Specifies the operation of the RAM. Values are "SINGLE_PORT", "DUAL_PORT", "BIDIR_DUAL_PORT", or "ROM". If omitted, the default is "BIDIR_DUAL_PORT".
|
WIDTH_A
| Integer | Yes | Specifies the width of the data_a[] input port. If omitted, the default is "1".
|
WIDTHAD_A
| Integer | Yes | Specifies the width of the address_a[] input port. When the OPERATION_MODE parameter is set to "BIDIR_DUAL" mode, the WIDTH_A parameter is required. If omitted, the default is "1".
|
NUMWORDS_A
| Integer | No | Number of words stored in memory. If omitted, the default is 2 ^ WIDTHAD_A.
|
OUTDATA_REG_A
| String | No | Specifies the clock for the q_a[] port. Values are "CLOCK0", "CLOCK1", "UNREGISTERED", or . If omitted, the default is "UNREGISTERED".
|
ADDRESS_ACLR_A
| String | No | Specifies the asynchronous clear for the address_a[] port. Values are "CLEAR0", "NONE", or "UNUSED". If omitted, the default is "NONE".
|
OUTDATA_ACLR_A
| String | No | Specifies the asynchronous clear for the q_a[] output port. Values are "CLEAR0", "CLEAR1", "NONE", or "UNUSED". If omitted, the default is "NONE".
|
INDATA_ACLR_A
| String | No | Specifies the asynchronous clear for the data_a[]input port. Values are "CLEAR0", "NONE", or "UNUSED". If omitted, the default is "NONE".
|
WRCONTROL_ACLR_A
| String | No | Specifies the asynchronous clear for the wren_ainput port. Values are "CLEAR0", "NONE", or "UNUSED". If omitted, the default is "NONE".
|
BYTEENA_ACLR_A
| String | No | Specifies asynchronous clear for the byteena_a input port. Values are "CLEAR0", "CLEAR1", or "NONE". If omitted, the default is "NONE".
|
WIDTH_BYTEENA_A
| Integer | No | Specifies the width of the byteena_a input port. The WIDTH_BYTEENA_A parameter value must be equal to WIDTH_A / BYTE_SIZE. The WIDTH_BYTEENA_A parameter is required if the byteena_a port is specified.
|
WIDTH_B
| Integer | No | Specifies the width of the data_b[] input port. When the OPERATION_MODE parameter is set to "DUAL_PORT" mode, the WIDTH_B parameter is required. If omitted, the default is "1".
|
WIDTHAD_B
| Integer | No | Specifies the width of the address_b[] input port. If omitted, the default is "1".
|
NUMWORDS_B
| Integer | No | Number of words stored in memory. If omitted, the default is 2 ^ WIDTHAD_B.
|
RDCONTROL_REG_B
| String | No | Specifies the clock for the rden_b port during read mode. Values are "CLOCK0", "CLOCK1", or "UNUSED". If omitted, the default is "CLOCK1".
|
ADDRESS_REG_B
| String | No | Specifies the clock for the address_b[] port. Values are "CLOCK0", "CLOCK1", or "UNUSED". If omitted, the default is "CLOCK1".
|
INDATA_REG_B
| String | No | Specifies the clock for the data_b[] port. Values are "CLOCK0", "CLOCK1", or "UNUSED". If omitted, the default is "CLOCK1".
|
WRCONTROL_WRADDRESS_REG_B
| String | No | Specifies the clock for the wren_b and address_b[] port during write mode. Values are "CLOCK0", "CLOCK1", or "UNUSED". If omitted, the default is "CLOCK1".
|
BYTEENA_REG_B
| String | No | Specifies the clock for the byteena_b[] port. Values are "CLOCK0", "CLOCK1", or "UNUSED". If omitted, the default is "CLOCK1".
|
OUTDATA_REG_B
| String | No | Specifies the clock for the q_b[] port. Values are "CLOCK0", "CLOCK1", "UNREGISTERED", or "UNUSED". If omitted, the default is "UNREGISTERED".
|
OUTDATA_ACLR_B
| String | No | Specifies the asynchronous clear for the q_b[] output port. Values are "CLEAR0", "CLEAR1", "NONE", or "UNUSED". If omitted, the default is "NONE".
|
RDCONTROL_ACLR_B
| String | No | Specifies the clear source for the port B read enable control register. Values are "CLEAR0", "CLEAR1", "NONE", or "UNUSED". The default value is "NONE".
|
INDATA_ACLR_B
| String | No | Specifies the asynchronous clear for the data_b[]input port. Values are "CLEAR0", "NONE", or "UNUSED". If omitted, the default is "NONE".
|
WRCONTROL_ACLR_B
| String | No | Specifies the asynchronous clear for the wren_binput port. Values are "CLEAR0", "NONE", or "UNUSED". If omitted, the default is "NONE".
|
ADDRESS_ACLR_B
| String | No | Specifies the asynchronous clear for the address_b[] port. Values are "CLEAR0", "NONE", or "UNUSED". If omitted, the default is "NONE".
|
BYTEENA_ACLR_B
| String | No | Specifies asynchronous clear for the byteena_b input port. Values are "CLEAR0", "CLEAR1", "NONE", or "UNUSED". If omitted, the default is "NONE".
|
WIDTH_BYTEENA_B
| Integer | No | Specifies the width of the byteena_b input port. The WIDTH_BYTEENA_B parameter value must be equal to WIDTH_B / BYTE_SIZE. The WIDTH_BYTEENA_B parameter is required if the byteena_b port is specified.
|
BYTE_SIZE
| Integer | No | Specifies the byte enable size. Values are "8" or "9". If omitted, the default is "8".
|
READ_DURING_WRITE_MODE_MIXED_PORTS
| String | No | Specifies the behavior when the read and write operations occur at different ports on the same RAM address. Values are "OLD_DATA" or "DONT_CARE". The default value is "DONT_CARE". When the OPERATION_MODE parameter is set to "MEGARAM", the READ_DURING_WRITE_MODE_MIXED_PORTS parameter must be set to "DONT_CARE".
|
RAM_BLOCK_TYPE
| String | No | Specifies the RAM block type. Values are "M512", "M4K", "MEGARAM", or "AUTO". If omitted, the default is "AUTO".
|
INIT_FILE
| String | No | Name of the or containing RAM initialization data ("<file name>"), or "UNUSED". The default is "UNUSED". The INIT_FILE parameter is unavailable when the RAM_BLOCK_TYPE parameter is set to MEGARAM. When the OPERATION_MODE parameter is set to "DUAL_PORT", the Compiler uses only the WIDTH_B parameters to read the initialization file.
|
INIT_FILE_LAYOUT
| String | No | Specifies the layout port used with the initialization file. Values are "PORT_A" or "PORT_B". If the OPERATION_MODE is set to "DUAL_PORT" mode, the default value is "PORT_B". If the OPERATION_MODE is set to other modes, the the default value is "PORT_A".
|
MAXIMUM_DEPTH
| Integer | No | Specifies the maximum segmented value of the RAM. The MAXIMUM_DEPTH parameter value depends on the RAM_BLOCK_TYPE parameter. If omitted, the default is "0".
|
INTENDED_DEVICE_FAMILY
| String | No | This parameter is used for modeling and behavioral simulation purposes. Create the PLL with the MegaWizard Plug-in Manager to calculate the value for this parameter. |
LPM_HINT
| String | No | Allows you to assign in . If omitted, the default is "UNUSED". |
