diff options
Diffstat (limited to 'keyboard/hhkb/doc/HHKB.txt')
| -rw-r--r-- | keyboard/hhkb/doc/HHKB.txt | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/keyboard/hhkb/doc/HHKB.txt b/keyboard/hhkb/doc/HHKB.txt index 98397b8477..3d08ceb0af 100644 --- a/keyboard/hhkb/doc/HHKB.txt +++ b/keyboard/hhkb/doc/HHKB.txt @@ -31,27 +31,28 @@ Two PCBs are connected by 15 lines(13 in case of Pro2). Vcc and GND use 3(2) lines each, other lines are for keyboard signaling. HHKB connector lines: - JP Pro2 Pro Function Description Teensy++ pins + JP Pro2 Pro Function Description TMK pin usage -------------------------------------------------------------------------------------------- 1 Vcc(5V) 5V 1 1 2 Vcc(5V) 5V 2 2 3 Vcc(5V) 5V - 3 3 4 TP1684 KEY: Low(0) when key pressed PE6 input(with pullup) - 4 4 5 TP1684 KEY_PREV: make threshold PE7 output + 3 3 4 TP1684 ~KEY: Low(0) when key is pressed PD7 input(with pullup) + 4 4 5 TP1684 HYS: High(1) when key is pressed PB7 output 5 5 6 HC4051 A(bit0)\ PB0 output 6 6 7 HC4051 B(bit1) > select row 0-7 PB1 output 7 7 8 HC4051 C(bit2)/ PB2 output 8 8 9 LS145 A(bit0)\ PB3 output 9 9 10 LS145 B(bit1) > select column 0-7 PB4 output 10 10 11 LS145 C(bit2)/ PB5 output - 11 11 12 LS145 D(enable) Low(0) enables selected column PB6 output + 11 11 12 LS145 ~D(enable) Low(0) enables selected column PB6 output 12 12 13 GND GND 13 13 14 GND GND 15 GND - 14 HC4051(Z2) ~Enable of Z2 row0-7 - 15 HC4051(Z3) ~Enable of Z3 row8-15 + 14 HC4051(Z2) ~Enable of Z2 row0-7 PC6 + 15 HC4051(Z3) ~Enable of Z3 row8-15 PC7 - NOTE: guessing pin5(KEY_PREV) may work for hysteresis of capacitive sensing. + NOTE: Probably HYS changes threshold for upstroke and makes hysteresis in the result. + NOTE: HYS should be given High(1) when previous KEY state is Low(0). NOTE: 1KOhm didn't work as pullup resistor on KEY. AVR internal pullup or 10KOhm resistor was OK. NOTE: JP has two HC4051(Z2,Z3) and line 5, 6 and 7 are connected to both of them. @@ -112,7 +113,7 @@ Matrix diagram: | <-+ | <6-------|-|-|-|-|-|-|-|--|R|-+ | 1 4 | | | <7-------|-|-|-|-|-|-|-|--|R|-+ +---V---^-+ | +-^-^-^--+ 0 1 2 3 4 5 6 7 33K*8 - KEY PREV | A B C +-----------------+ + KEY HYS | A B C +-----------------+ | | +-^----+ | | | | LS145 | Vcc | | |BU9831| | | | +-^--^--^--^------+ --- | | +------+ | | | A B C D +-------+ @@ -138,7 +139,7 @@ Matrix diagram: | | +----> <6-----------|-|-|-|-|----|R|-+ | | | | | A B C <7-----------|-|-|-|-|----|R|-+ +---V---^-+ | | +-^-^-^--+ | | | | | | - KEY PREV | | | | | | | | | | | + KEY HYS | | | | | | | | | | | | | | | +--------+ | | | | | | | | | | | HC4051 <8-----------|-|-|-|-|----|R|-+ | | | | | Z3 <9-----------|-|-|-|-|----|R|-+ @@ -192,7 +193,7 @@ Signals charts 0123456701234567 selected column 3) Wait 5us after column select, then set prev, strobe colD to spit out key status and read it. - prev _~~~~_____ 20us if previous key state is low + hys _~~~~_____ 20us if previous key state is low colD ~~~__~~~~~ 10us strobe key ~~~____~~~ 22us indicates current state of the key |