Difference between revisions of "Front Panel For 8 Bit Computers"
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* Interrupt line | * Interrupt line | ||
** Can be configured to interrupt on button presses | ** 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 | * 4 MCP23017 16-bit I2C Port Expanders | ||
* These are fine pitch surface mount parts | * These are fine pitch surface mount parts | ||
* 32 Pushbutton Switches | * 32 Pushbutton Switches | ||
* 32 LEDs | * 32 LEDs | ||
| + | * 3.3V or 5V operation | ||
== Schematic == | == Schematic == | ||
Revision as of 12:37, 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)
- Occupy I2C addresses either 0x20-0x23 or 0x24-0x27
- Jumper selectable base address
- 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
Schematic
Drivers
- I2C parts are standard MCP23017 drivers which are supported in Arduino and most microprocessors
- PSoC driver GitHub Repo
