Difference between revisions of "Front Panel For 8 Bit Computers"
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* I2C interface (Two Wire interface - plus power and ground) | * I2C interface (Two Wire interface - plus power and ground) | ||
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* Jumper selectable base address | * Jumper selectable base address | ||
| + | ** Occupies I2C addresses either 0x20-0x23 or 0x24-0x27 | ||
* Jumper Selectable I2C terminators | * Jumper Selectable I2C terminators | ||
* I2C daisy-chain connector | * I2C daisy-chain connector | ||
Revision as of 12:40, 5 June 2021
Front Panel for 8-Bit Microprocessors
Features
It has these features. They may not fit your generic design. Especially since this card has to have an I2C interface.
- I2C interface (Two Wire interface - plus power and ground)
- Jumper selectable base address
- Occupies I2C addresses either 0x20-0x23 or 0x24-0x27
- Jumper Selectable I2C terminators
- I2C daisy-chain connector
- Interrupt line
- Can be configured to interrupt on button presses
- MCP23017 need to be set to Open-Drain output - card has pull-up to Vcc
- 4 MCP23017 16-bit I2C Port Expanders
- These are fine pitch surface mount parts
- 32 Pushbutton Switches
- 32 LEDs
- 3.3V or 5V operation
- Compatible form factor with RETRO-EP4CE15 and other cards
- 95x95mm
- 6-32 mounting holes
Schematic
Drivers
- I2C parts are standard MCP23017 drivers which are supported in Arduino and most microprocessors
- PSoC driver GitHub Repo
