FreeCalypso > hg > freecalypso-schem2

annotate venus/src/core/memory.v @ 83:c27854430cb3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
add 3-pin header for possible external boot control
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 08 Dec 2021 05:32:47 +0000
parents 3ed0f7a9c489
children 96e02b1b2374
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
9
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 module memory (GND, Vflash, Vsram,
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 MCU_A, MCU_D, MCU_nRD, MCU_nWR, MCU_nBHE, MCU_nBLE,
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 Flash_RST, CS_flash1, CS_RAM);
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 input GND, Vflash, Vsram;
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 input [22:1] MCU_A;
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 inout [15:0] MCU_D;
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 input MCU_nRD, MCU_nWR, MCU_nBHE, MCU_nBLE;
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 input Flash_RST;
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 input CS_flash1, CS_RAM;
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 S71PL064J chip (.Flash_Vcc(Vflash),
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 .RAM_Vcc(Vsram),
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 .Vss(GND),
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 .A(MCU_A),
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 .DQ(MCU_D),
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 .OE(MCU_nRD),
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 .WE(MCU_nWR),
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 .Flash_CE1(CS_flash1),
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 .Flash_RST(Flash_RST),
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 .Flash_WP_ACC(Vflash),
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 .Flash_ready_busy(), /* no connect */
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 .RAM_CE_actlow(CS_RAM),
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 .RAM_CE_acthigh(Vsram),
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 .RAM_UB(MCU_nBHE),
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 .RAM_LB(MCU_nBLE)
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 );
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 /* bypass caps */
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 capacitor C318 (Vsram, GND);
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 capacitor C322 (Vflash, GND);
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 endmodule