Difference between revisions of "Universal 4x4 keypad"
From ScienceZero
(New page: ==Keypads== 3 predefined keypads and one user definable keypad. Selectable binary or ASCII. ===Telephone keypad=== 1 2 3 A 4 5 6 B 7 8 9 C * 0 # D ===Calculator keypad=== 7 8 9 + 4 ...) |
|||
| Line 30: | Line 30: | ||
==Misc== | ==Misc== | ||
*Selectable beep/LED | *Selectable beep/LED | ||
| + | |||
| + | ==Pin assignemnt== | ||
| + | *RB0-3 = Keyboard output/Parallel data output | ||
| + | *RB4-7 = Keyboard input | ||
| + | *RA0 = DATA (RS-232, SPI, MIDI) | ||
| + | *RA1 = CLOCK (SPI) | ||
| + | *RA2 = ENABLE (SPI, Parallel) | ||
| + | *RA3 = BEEPER/LED | ||
| + | *RA4 = Free | ||
| + | |||
| + | |||
| + | ==Connection diagram for keypad== | ||
| + | If the keypad is 3 keys wide; leave RB7 disconnected. | ||
| + | RB0---X---X---X---X-- | ||
| + | | | | | | ||
| + | RB1---X---X---X---X-- | ||
| + | | | | | | ||
| + | RB2---X---X---X---X-- | ||
| + | | | | | | ||
| + | RB3---X---X---X---X-- | ||
| + | | | | | | ||
| + | RB4 RB5 RB6 RB7 | ||
Revision as of 12:19, 11 March 2009
Contents
Keypads
3 predefined keypads and one user definable keypad. Selectable binary or ASCII.
Telephone keypad
1 2 3 A 4 5 6 B 7 8 9 C * 0 # D
Calculator keypad
7 8 9 + 4 5 6 - 1 2 3 * 0 . E /
User defined keypad
7 8 9 / 4 5 6 * 1 2 3 - C 0 = +
Interface
- RS-232
- 16 to 43 478 Baud
- SPI
- 83 kHz with enable
- Parallel
- 4 bit parallel output of key number
- MIDI
Misc
- Selectable beep/LED
Pin assignemnt
- RB0-3 = Keyboard output/Parallel data output
- RB4-7 = Keyboard input
- RA0 = DATA (RS-232, SPI, MIDI)
- RA1 = CLOCK (SPI)
- RA2 = ENABLE (SPI, Parallel)
- RA3 = BEEPER/LED
- RA4 = Free
Connection diagram for keypad
If the keypad is 3 keys wide; leave RB7 disconnected.
RB0---X---X---X---X--
| | | |
RB1---X---X---X---X--
| | | |
RB2---X---X---X---X--
| | | |
RB3---X---X---X---X--
| | | |
RB4 RB5 RB6 RB7
