FreeCalypso > hg > freecalypso-schem2
annotate venus/src/usb/FT2232D_block.v @ 24:4722b265cb8c
Venus src: USB domain captured
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 20 Nov 2021 19:44:59 +0000 |
parents | 9f70dc110ad7 |
children | 8f3df7a222f5 |
rev | line source |
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1 /* |
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2 * This module encapsulates the FT2232D chip and its immediate accessories: |
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3 * the oscillator crystal, the EEPROM, the AVCC filter and the cap on 3V3OUT. |
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4 */ |
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5 |
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6 module FT2232D_block (GND, VCC, VCCIOA, VCCIOB, |
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7 USBDP, USBDM, RESET, RSTOUT, PWREN, |
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8 ADBUS, ACBUS, SI_WUA, BDBUS, BCBUS, SI_WUB); |
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9 |
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10 input GND, VCC, VCCIOA, VCCIOB; |
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11 |
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12 inout USBDP, USBDM; |
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13 |
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14 input RESET; |
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15 output RSTOUT, PWREN; |
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16 |
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17 inout [7:0] ADBUS, BDBUS; |
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18 inout [3:0] ACBUS, BCBUS; |
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19 input SI_WUA, SI_WUB; |
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20 |
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21 /* FT2232D pins handled within this block */ |
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22 |
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23 wire EECS, EESK, EEDATA; |
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24 wire XTIN, XTOUT; |
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25 wire AVCC, FTDI_3V3; |
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26 |
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27 /* instantiate the FT2232D */ |
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28 |
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29 FT2232D_chip FT2232D (.GND(GND), |
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30 .AGND(GND), |
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31 .VCC(VCC), |
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32 .AVCC(AVCC), |
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33 .VCCIOA(VCCIOA), |
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34 .VCCIOB(VCCIOB), |
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35 .OUT_3V3(FTDI_3V3), |
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36 .USBDP(USBDP), |
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37 .USBDM(USBDM), |
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38 .EECS(EECS), |
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39 .EESK(EESK), |
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40 .EEDATA(EEDATA), |
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41 .RESET(RESET), |
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42 .RSTOUT(RSTOUT), |
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43 .TEST(GND), |
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44 .PWREN(PWREN), |
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45 .XTIN(XTIN), |
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46 .XTOUT(XTOUT), |
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47 .ADBUS(ADBUS), |
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48 .ACBUS(ACBUS), |
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49 .SI_WUA(SI_WUA), |
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50 .BDBUS(BDBUS), |
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51 .BCBUS(BCBUS), |
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52 .SI_WUB(SI_WUB) |
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53 ); |
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54 |
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55 /* VCCIO bypass caps */ |
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56 |
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57 capacitor VCCIOA_bypass_cap (VCCIOA, GND); |
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58 capacitor VCCIOB_bypass_cap (VCCIOB, GND); |
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59 |
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60 /* AVCC filter */ |
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61 |
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62 resistor AVCC_filter_R (VCC, AVCC); |
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63 capacitor AVCC_cap (AVCC, GND); |
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64 |
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65 /* 3V3OUT */ |
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66 |
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67 capacitor FTDI_3V3_cap (FTDI_3V3, GND); |
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68 |
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69 /* crystal oscillator */ |
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70 |
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71 xtal_2pin_pkg xtal (XTIN, XTOUT); |
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72 capacitor XTIN_cap (XTIN, GND); |
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73 capacitor XTOUT_cap (XTOUT, GND); |
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74 |
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75 /* serial EEPROM */ |
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76 |
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77 wire EEPROM_DOUT; |
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78 |
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79 eeprom_93Cx6_16bit eeprom (.GND(GND), |
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80 .VCC(VCC), |
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81 .CS(EECS), |
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82 .SK(EESK), |
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83 .DIN(EEDATA), |
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84 .DOUT(EEPROM_DOUT) |
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85 ); |
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86 |
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87 resistor DOUT_series_R (EEPROM_DOUT, EEDATA); |
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88 resistor DOUT_pullup_R (EEPROM_DOUT, VCC); |
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89 |
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90 endmodule |