RAM memory with a separate address port for reading data and a separate one for writing. Moreover, the write and read ports can be connected to completely different clock signals.
PseudoDualPortRAM #(
.ADDRESS_WIDTH(),
.DATA_WIDTH(8)
) DUT(
.ReadClock(ReadClock),
.WriteClock(WriteClock),
.Reset(Reset),
.ReadEnable_i(),
.WriteEnable_i(),
.ReadAddress_i(),
.WriteAddress_i(),
.Data_i(),
.Data_o()
);- ADDRESS_WIDTH - Number of address bus bits. Determines the size of the memory. The memory size is equal to 2^ADDRESS_WIDTH.
- DATA_WIDTH - Number of data bus bits. Most common values are 8, 16 and 32.
- ReadClock - Clock signal for read port, active rising edge.
- WriteClock - Clock signal for write port, active rising edge.
- Reset - Asynchronous reset, active low.
- ReadEnable_i - If 1 then on the next clock edge the requested data is output on
Data_o. - WriteEnable_i - If 1 then on the next clock edge the data delivered on
Data_iis written to selected address. - ReadAddress_i[ADDRESS_WIDTH-1:0] - Address of the byte requested to be read on the next clock edge.
- WriteAddress_i[ADDRESS_WIDTH-1:0] - Address of the byte requested to be written on the next clock edge.
- Data_i[DATA_WIDTH-1:0] - Data to be written to the requestred address.
- Data_o[DATA_WIDTH-1:0] - Data read from the requested address.
VCD info: dumpfile ram_pdp.vcd opened for output.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[0] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[1] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[2] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[3] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[4] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[5] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[6] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[7] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[8] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[9] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[10] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[11] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[12] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[13] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[14] will conflict with an escaped identifier.
VCD warning: array word PseudoDualPortRAM_tb.DUT.Memory[15] will conflict with an escaped identifier.
===== START =====
Time WriteAddress DataIn ReadAddress DataOut
0.000us x xx x 00
0.132us 0 92 x 00
0.198us 1 40 x 00
0.264us 2 04 x 00
0.330us 3 31 x 00
0.396us 4 86 x 00
0.462us 5 c6 x 00
0.500us 5 c6 0 00
0.528us 6 32 0 00
0.594us 7 09 0 00
0.600us 7 09 1 92
0.660us 8 80 1 92
0.700us 8 80 2 40
0.726us 9 86 2 40
0.792us a bb 2 40
0.800us a bb 3 04
0.858us b 9e 3 04
0.900us b 9e 4 31
0.924us c f6 4 31
0.990us d c6 4 31
1.000us d c6 5 86
1.056us e fc 5 86
1.100us e fc 6 c6
1.122us f 63 6 c6
1.188us x xx 6 c6
1.200us x xx 7 32
1.300us x xx 8 09
1.400us x xx 9 80
1.500us x xx a 86
1.600us x xx b bb
1.700us x xx c 9e
1.800us x xx d f6
1.900us x xx e c6
2.000us x xx f fc
2.100us x xx x 63
===== END =====
ram_pdp_tb.v:106: $finish called at 2300 (1ns)