DLATRAM
DLATROM
Extends from Modelica.Icons.Package (Icon for standard packages).
| Name | Description |
|---|---|
| DLATRAM
|
Level sensitive Random Access Memory |
| DLATROM
|
Level sensitive Read Only Memory |
Modelica.Electrical.Digital.Memories.DLATRAMLevel sensitive Random Access Memory
Description in VHDL is given by http://www.cs.sfu.ca/~ggbaker/reference/std_logic/src/std_logic_entities.vhd
Truth Table for high active read enable RE:
| RE | Addr | DataOut |
| 0 | * | Z over all |
| 1 | no X in Addr | DataOut=m(Addr) |
| 1 | X in Addr | X over all |
| X | * | X over all |
Truth Table for high active write enable WE:
| WE | Addr | Memory |
| 0 | * | no write |
| 1 | no X in Addr | m(Addr)=DataIn |
| 1 | X in Addr | no write |
| X | no X in Addr | m(Addr)=X over all |
| X | X in Addr | no write |
* = do not care 0 = L.'0' or L.'L' 1 = L.'1' or L.'H' X = L.'X' or L.'W' or L.'Z' or L.'-' or L.'U' Z = L.'Z'
Simultaneous read/write operations are allowed. Firstly Write is carried out, then Read.
| Name | Description |
|---|---|
| tHL | High->Low delay [s] |
| tLH | Low->High delay [s] |
| strength | output strength |
| n_addr | addr width |
| n_data | data width |
| table data definition | |
| fileName | |
| Name | Description |
|---|---|
| RE | read enable |
| WE | write enable |
| addr[n_addr] | address |
| dataIn[n_data] | data input |
| dataOut[n_data] | data output |
Modelica.Electrical.Digital.Memories.DLATROMLevel sensitive Read Only Memory
Description in VHDL is given by http://www.cs.sfu.ca/~ggbaker/reference/std_logic/src/std_logic_entities.vhd
Truth Table for high active read enable RE:
| RE | Addr | DataOut |
| 0 | * | Z over all |
| 1 | no X in Addr | DataOut=m(Addr) |
| 1 | X in Addr | X over all |
| X | * | X over all |
* = do not care 0 = L.'0' or L.'L' 1 = L.'1' or L.'H' X = L.'X' or L.'W' or L.'Z' or L.'-' or L.'U' Z = L.'Z'
| Name | Description |
|---|---|
| tHL | High->Low delay [s] |
| tLH | Low->High delay [s] |
| strength | output strength |
| n_addr | addr width |
| n_data | data width |
| table data definition | |
| fileName | File where matrix for memory is stored |
| Name | Description |
|---|---|
| RE | read enable |
| addr[n_addr] | address |
| dataOut[n_data] | data output |