(Again, someone should please verify this and double check my work.)
The keypad matrix row and column lines are connected to PIOC lines (port C, general purpose I/O).
The ON key is tied to PC10 and FWUP. it is not part of the matrix.
Port pin | Keypad connection |
---|---|
PC0 | Keypad column 0 |
PC1 | Keypad column 1 |
PC2 | Keypad column 2 |
PC3 | Keypad column 3 |
PC4 | Keypad column 4 |
PC5 | Keypad column 5 |
PC6 | Keypad column 6 |
PC11 | Keypad row 0 |
PC12 | Keypad row 1 |
PC13 | Keypad row 2 |
PC14 | Keypad row 3 |
PC15 | Keypad row 4 |
PC26 | Keypad row 5 |
Row 0 | Row 1 | Row 2 | Row 3 | Row 4 | Row 5 | |
---|---|---|---|---|---|---|
Column 0 | N | I/YR | PV | PMT | FV | Amort |
Column 1 | CshFl | IRR | NPV | Bond | % | RCL |
Column 2 | Input | ( | ) | +/- | Backspace | |
Column 3 | Up | 7 | 8 | 9 | Divide | |
Column 4 | Down | 4 | 5 | 6 | X | |
Column 5 | Shift | 1 | 2 | 3 | - | |
Column 6 | 0 | . | = | + |