LC7461 datasheet(5/7 Pages) SANYO

5 / 7 page

(a) Custom code

The custom code, which consists of 13 bits (C0 to C12) in all, is used to distinguish between receiving sets.

C6 to C12 are fixed by the mask ROM and C0 to C5 are pin-settable.

The custom codes are controlled by Sanyo to avoid duplication.

(b) Key data

When multi-press of key No.20 and one of key No.21, 22, 23 is done, multi-bit D5 will be set to ‘‘1’’, with no priority given

in key entry.

Pin-selectable

Mask ROM

6 bits

7 bits

In this example C0 to C5 are

set as follows:

011001

Multi-press

KEY No.

20, 21

10101100

20, 22

01101100

20, 23

11101100

D6,D7 may be preset to ‘‘0’’,‘‘1’’ beforehand (mask

option).

KEY No.

0000000

1000000

0100000

10111000

01111000

11111000

(H: Key-ON state)

Key 20

data

transmit

Keys 20, 21

multi-press

data transmit

Key 21

data

transmit

Transmit

stop

Key 22

data

transmit

Keys 20, 22

multi-press data

transmit

LC7461M

No.2119-5/7

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