diff options
Diffstat (limited to 'keyboard/hhkb/doc/HHKB.txt')
| -rw-r--r-- | keyboard/hhkb/doc/HHKB.txt | 36 |
1 files changed, 19 insertions, 17 deletions
diff --git a/keyboard/hhkb/doc/HHKB.txt b/keyboard/hhkb/doc/HHKB.txt index f99a074437..422c452c90 100644 --- a/keyboard/hhkb/doc/HHKB.txt +++ b/keyboard/hhkb/doc/HHKB.txt @@ -30,25 +30,27 @@ Connector Cable Two PCBs are connected by 15 lines(13 in case of Pro2). Vcc and GND use 3(2) lines each, other 9 lines are for keyboard signaling. - Keyswitch PCB connector Teensy++ pins - ------------------------------------------------------------------------------- - 1 Vcc(5V) Not exist on Pro2 5V - 2 Vcc(5V) 5V - 3 Vcc(5V) 5V - 4 TP1684 KEY: Low(0) when key pressed PE6 input(with pullup) - 5 TP1684 KEY_PREV: assert previous key state??? PE7 output - 6 HC4051 A(bit0) select 8 rows(0 to 7) PB0 output - 7 HC4051 B(bit1) PB1 output - 8 HC4051 C(bit2) PB2 output - 9 LS145 A(bit0) select 8 columns(0 to 7) PB3 output - 10 LS145 B(bit1) PB4 output - 11 LS145 C(bit2) PB5 output - 12 LS145 D(enable) Low(0) enable selected column PB6 output - 13 GND GND - 14 GND GND - 15 GND Not exist on Pro2 GND + Keyswitch connector + pro pro2 Description Teensy++ pins + -------------------------------------------------------------------------------------------- + 1 Vcc(5V) Not exist on Pro2 5V + 2 1 Vcc(5V) 5V + 3 2 Vcc(5V) 5V + 4 3 TP1684 KEY: Low(0) when key pressed PE6 input(with pullup) + 5 4 TP1684 KEY_PREV: make threshold PE7 output + 6 5 HC4051 A(bit0)\ PB0 output + 7 6 HC4051 B(bit1) > select row(0 to 7) PB1 output + 8 7 HC4051 C(bit2)/ PB2 output + 9 8 LS145 A(bit0)\ PB3 output + 10 9 LS145 B(bit1) > select column(0 to 7) PB4 output + 11 10 LS145 C(bit2)/ PB5 output + 12 11 LS145 D(enable) Low(0) enables selected column PB6 output + 13 12 GND GND + 14 13 GND GND + 15 GND Not exist on Pro2 GND NOTE: guessing pin5(KEY_PREV) may work for hysteresis of capacitive sensing. + NOTE: 1KOhm didn't work as pullup resistor on KEY. AVR internal pullup or 10KOhm resistor was OK. (HHKB_connector.jpg) |