--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/venus/src/core/rita_vcxo_int.v	Fri Nov 19 05:58:21 2021 +0000
@@ -0,0 +1,85 @@
+/*
+ * This module encapsulates the Rita block (Rita chip + caps) together with
+ * the choice of internal or external VC(TC)XO; this version is for the
+ * internal configuration.
+ */
+
+module rita_vcxo_int (GND, VBAT, VREG3, VRIO,
+		      TCXOEN, RFEN, AFC_in, Clock_out_to_DBB,
+		      Ctrl_CLK, Ctrl_DATA, Ctrl_STROBE, Ctrl_RESETZ,
+		      IN, IP, QN, QP,
+		      LNAGSMN, LNAGSMP, LNADCSN, LNADCSP, LNAPCSN, LNAPCSP,
+		      LBTXOUT, HBTXOUT,
+		      DAC, DET1, DET2, APC,
+		      RTEMP_VTEST);
+
+input GND, VBAT, VRIO;
+output VREG3;
+
+input TCXOEN, RFEN, AFC_in;
+output Clock_out_to_DBB;
+
+input Ctrl_CLK, Ctrl_DATA, Ctrl_STROBE, Ctrl_RESETZ;
+inout IN, IP, QN, QP;
+
+input LNAGSMN, LNAGSMP, LNADCSN, LNADCSP, LNAPCSN, LNAPCSP;
+output LBTXOUT, HBTXOUT;
+
+input DAC, DET1, DET2;
+output APC;
+
+output RTEMP_VTEST;
+
+/* internal VCTCXO configuration */
+
+wire XIN;
+
+int_vcxo_passive vcxo_passive (AFC_in, XIN, GND);
+
+/*
+ * Some Leonardo schematic versions show a "resistor short" with refdes R604
+ * between TCXOEN from the Calypso and the net going to XEN, XSEL and the cap
+ * or two caps.  In Openmoko's version this component is a physical 0402 SMT
+ * 0R jumper; in iWOW TR-800 this series R has been measured to be 47 Ohm
+ * instead.  On FC Venus we shall include an 0402 series R footprint
+ * just in case.
+ */
+
+wire TCXOEN_after_0R;
+
+resistor R604 (TCXOEN, TCXOEN_after_0R);
+
+/* instantiate the Rita block */
+
+rita_wrap rita (.GND(GND),
+		.VBAT(VBAT),
+		.VREG3(VREG3),
+		.VRIO(VRIO),
+		.XEN(TCXOEN_after_0R),
+		.XSEL(TCXOEN_after_0R),
+		.XIN(XIN),
+		.Clock_out_to_DBB(Clock_out_to_DBB),
+		.Ctrl_CLK(Ctrl_CLK),
+		.Ctrl_DATA(Ctrl_DATA),
+		.Ctrl_STROBE(Ctrl_STROBE),
+		.Ctrl_RESETZ(Ctrl_RESETZ),
+		.IN(IN),
+		.IP(IP),
+		.QN(QN),
+		.QP(QP),
+		.LNAGSMN(LNAGSMN),
+		.LNAGSMP(LNAGSMP),
+		.LNADCSN(LNADCSN),
+		.LNADCSP(LNADCSP),
+		.LNAPCSN(LNAPCSN),
+		.LNAPCSP(LNAPCSP),
+		.LBTXOUT(LBTXOUT),
+		.HBTXOUT(HBTXOUT),
+		.DAC(DAC),
+		.DET1(DET1),
+		.DET2(DET2),
+		.APC(APC),
+		.RTEMP_VTEST(RTEMP_VTEST)
+	);
+
+endmodule