Ultratec Minicom IV

teclado

(*) Informações presumidas, com base em aparentes simetrias do circuito.
74373 = CI U18 na pcb (octal D-Type latch with 3-state outputs)
Atenção! O CI PLCC44 do microcontrolador  está rotacionado em 90 graus, sentido anti-horário em relação à marcação no silk-screen.

pino 24 (P2.0)

seleciona grupo:

• 1 (74373 D0 => pino 43, P0.0)
• 2 (74373 D1 => pino 42, P0.1) (*)
• 3 (74373 D2 => pino 41, P0.2) (*)
• 4 (74373 D3 => pino 40, P0.3)
• 5 (74373 D4 => pino 39, P0.4) (*)
• 6 (74373 D5 => pino 38, P0.5) (*)
• 7 (74373 D6 => pino 37, P0.6)
• 8 (74373 D7 => pino 36, P0.7) (*)

pino 25 (P2.1)

seleciona grupo:

• 9 (74373 D0 => pino 43, P0.0)
• 0 (74373 D1 => pino 42, P0.1) (*)
• += (74373 D2 => pino 41, P0.2) (*)
• backspace (74373 D3 => pino 40, P0.3)
• I (74373 D4 => pino 39, P0.4) (*)
• O (74373 D5 => pino 38, P0.5) (*)
• P (74373 D6 => pino 37, P0.6)
• return (74373 D7 => pino 36, P0.7) (*)

pino 26 (P2.2)

seleciona grupo:

• ESC (74373 D0 => pino 43, P0.0)
• Q (74373 D1 => pino 42, P0.1) (*)
• W (74373 D2 => pino 41, P0.2) (*)
• E (74373 D3 => pino 40, P0.3)
• R (74373 D4 => pino 39, P0.4) (*)
• T (74373 D5 => pino 38, P0.5) (*)
• Y (74373 D6 => pino 37, P0.6)
• U (74373 D7 => pino 36, P0.7) (*)

pino 27 (P2.3)

Seleciona grupo (apenas 7 teclas):

• A (74373 D1 => pino 42, P0.1) (*)
• S (74373 D2 => pino 41, P0.2) (*)
• D (74373 D3 => pino 40, P0.3)
• F (74373 D4 => pino 39, P0.4) (*)
• G (74373 D5 => pino 38, P0.5) (*)
• H (74373 D6 => pino 37, P0.6)
• J (74373 D7 => pino 36, P0.7) (*)

pino 28 (P2.4)

Seleciona grupo:

• spacebar (74373 D0 => pino 43, P0.0)
• L (74373 D1 => pino 42, P0.1) (*)
• :;(74373 D2 => pino 41, P0.2) (*)
• "' (74373 D3 => pino 40, P0.3)
• ,/ (74373 D4 => pino 39, P0.4) (*)
• ?. (74373 D5 => pino 38, P0.5) (*)
• GA (74373 D6 => pino 37, P0.6)
• K (74373 D7 => pino 36, P0.7) (*)

pino 29 (P2.5)

Seleciona grupo (apenas 7 teclas):

• Z (74373 D1 => pino 42, P0.1) (*)
• X (74373 D2 => pino 41, P0.2) (*)
• C (74373 D3 => pino 40, P0.3)
• V (74373 D4 => pino 39, P0.4) (*)
• B (74373 D5 => pino 38, P0.5) (*)
• N (74373 D6 => pino 37, P0.6)
• M (74373 D7 => pino 36, P0.7) (*)