FreeCalypso > hg > freecalypso-schem2

annotate venus/src/core/abb_rc_network.v @ 72:f0038b3d255f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
new 32.768 kHz crystal part, same specs as before
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 03 Dec 2021 02:51:51 +0000
parents 3ed0f7a9c489
children
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 /*
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 * In the Leonardo schematics there is an RC network in the analog I&Q
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 * signal path between the uplink (BUL[IQ][MP]) outputs from the ABB
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * and the bidirectional signals which connect directly to the RF xcvr
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * and to Iota's downlink (BDL[IQ][MP]) inputs.
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 *
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 * This structural Verilog module encapsulates the RC network in question.
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 */
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 module abb_rc_network (IM_bidir, IP_bidir, QM_bidir, QP_bidir,
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 IM_abbout, IP_abbout, QM_abbout, QP_abbout);
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 inout IM_bidir, IP_bidir, QM_bidir, QP_bidir;
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 input IM_abbout, IP_abbout, QM_abbout, QP_abbout;
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 wire IM_mid, IP_mid, QM_mid, QP_mid;
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 /* resistors on the outputs from the ABB */
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 resistor_slot R295A (IM_abbout, IM_mid);
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 resistor_slot R295B (IP_abbout, IP_mid);
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 resistor_slot R295C (QP_abbout, QP_mid);
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 resistor_slot R295D (QM_abbout, QM_mid);
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 /* capacitors in the middle */
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 capacitor C295 (QM_mid, QP_mid);
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 capacitor C296 (IM_mid, IP_mid);
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 /* resistors joining with the bidirectional lines */
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 resistor_slot R296A (IM_mid, IM_bidir);
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 resistor_slot R296B (IP_mid, IP_bidir);
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 resistor_slot R296C (QP_mid, QP_bidir);
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 resistor_slot R296D (QM_mid, QM_bidir);
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33
3ed0f7a9c489 Venus: first version of Verilog for the Calypso core
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 endmodule