COMET
tomstorey
A highly integrated, small form factor Motorola 68000 based computer featuring "COM" ports and an "ET"hernet controller, and associated bits and pieces
Components (25)
| Reference | Value | Description |
|---|---|---|
| U1 | 74FCT16245 | Dual octal bus transceiver; 3-state |
| U2,U16,U17 | 74HCT245 | Octal bus transceiver; 3-state |
| U3,U5,U6,U9,U10 | 74HCT1G32 | Single 2-input OR gate |
| U4 | 74HCT244 | Octal buffer/line driver; 3-state |
| U7 | 74HCT138 | 3-to-8 line decoder/demultiplexer; inverting |
| U8 | 74HCT688 | 8-bit magnitude comparator |
| U11 | CPLD | |
| U12 | 74LVC1G07 | Buffer with open-drain output |
| U13 | 74HCT273 | Octal D-type flip-flop with reset; positive-edge trigger |
| U14 | 74HCT373 | Octal D-type transparent latch; 3-state |
| U15 | 74LVC1G02 | Single 2-input NOR gate |
| C1,C2 | 22uF | Polarized capacitor |
| C3-C21 | 100nF | |
| D1 | IN_USE | |
| D2 | ACT | |
| J1 | DIN41612_03x32_ABC_COMETbus | DIN41612 3x32 male connector with COMETbus signals |
| J2 | OFFSET | Generic connector, double row, 02x04, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlib/autogen/connector/) |
| J3 | JTAG | Generic connector, double row, 02x05, odd/even pin numbering scheme (row 1 odd numbers, row 2 even numbers), script generated (kicad-library-utils/schlib/autogen/connector/) |
| J4 | Socket_CF | |
| R1,RN1-RN12 | 10K | 4 resistor network, parallel topology |
| R2 | 0R | |
| R3 | 1K | |
| R4 | 330R | |
| SW1 | BASE | 8x DIP Switch, Single Pole Single Throw (SPST) switch, small symbol |
| X1 | 40MHz | CMOS Clock Oscillator 2.5 to 50 MHz |