Module Z80 CPU and UART 16C450/550 for RCBus systems
| Position | Description |
|---|---|
| open | disable |
| closed | enable |
External power supply and USB cannot be used at the same time
| Position | Description |
|---|---|
| 1-2 | UART address: 0x80 |
| 2-3 (default) | UART address: 0xA0 |
| Position | Description |
|---|---|
| 1-2 | /INT |
| 2-3 | /IRQA |
| open | interrupt not use |
| Position | Description |
|---|---|
| both open | disable |
| both closed | enable |
| Position | Description |
|---|---|
| 1-2 | from oscillator |
| 2-3 | from bus |
| both closed | from oscillator to CPU and bus |
Connect to USB-to-serial converter.
| Component type | Reference | Description | Quantity |
|---|---|---|---|
| PCB | Z80 + UART PCB - Version 1.0 | 1 | |
| Integrated Circuit | U1 | Z84C00xxPEG - Z80 CPU, CMOS, 40 pin DIP | 1 |
| Integrated Circuit | U2 | 16C450 or 16C550 UART, 44 pin PLCC | 1 |
| Integrated Circuit | U3 | 74HCT138 - 3-to-8 line decoder, 16 pin DIP | 1 |
| Integrated Circuit | U4 | 74HCT02 - Quad 2-input NOR gate, 14 pin DIP | 1 |
| Oscillator | X1 | 7.3728 MHz, CMOS oscillator, half can | 1 |
| Diode | D1 | Small signal Schottky diodes BAT46, DO35 | 1 |
| Connector | S1 | 2x40 pin header, 2.54 mm pitch, angle | 1 |
| Connector | P1 | 6 pin header, 2.54 mm pitch, angle | 1 |
| Pin Header | JP1 | 2 pin header, 2.54 mm pitch | 1 |
| Pin Header | JP2,JP3 | 3 pin header, 2.54 mm pitch | 2 |
| Pin Header | JP4,JP5 | 2x2 pin header, 2.54 mm pitch | 2 |
| Capacitor | C1 - C4 | 0.1 uF, 50V, MLCC, 2.5 mm pitch | 4 |
| Resistor Array | RN1 | 10 kohm, bussed, 5 pin SIP | 1 |
| Resistor | R1 - R4 | 2.2 kohm, 0.25 W, axial | 4 |
| Resistor | R5,R6 | 100 kohm, 0.25 W, axial | 2 |
| IC Socket | U1 | 40 pin DIP | 1 |
| IC Socket | U2 | 44 pin PLCC | 1 |
| IC Socket | U3 | 16 pin DIP | 1 |
| IC Socket | U4 | 14 pin DIP | 1 |
| IC Socket | X1 | 4 pin DIP for oscillator | 1 |
Gerber files prepared for production at JLCPCB
-
Version 1.0
- Initial version
Copyright 2024 Tadeusz Pycio
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) .