DOUBLE KEY OPERATION

When more than two keys except K21 + K22, K21 +K23 and K21 +K24 are depressed at the

same time, the transmission output stops.

Double key operation is useful for tape deck recording operation.

Double key operation form are following.

(d) No operation

Page 11

V.2.0 Mar 8,2002

(b) No operation

(c) No operation

(a) Operation

KEY

K21 + K22

K21 + K23

K21 + K24

1

0

1

0

1

1

1

1

1

0

0

0

1

1

1

1

1

1

0/1

0/1

0/1

0

0

0

K21 Transmission

D5+K22 to 24 Transmission

K21

t > 126 ms

push

K22 to K24

push

K21

K21 Transmission

No Transmission

36 ms < t < 126 ms

K22 to K24

K21

No transmission

-36 ms < t < 36 ms

K22 to K24

K21

K22 to K24

t > 126 ms

K22 to 24 Transmission

No Transmission

SM5221-001/002

32 KEYS ENCODER

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