LC75700T View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LC75700T

Key Scan IC

SANYO -> Panasonic 

LC75700T

Control Data Functions

1.KP1, KP2: Selection data between the key scan output ports and the general-purpose output ports.

These control data bits switch the functions of the KS4/P4 to KS6/P2 output pins between the key scan output port and

the general-purpose output port.

KP1

KP2

Output pins

Maximum number Number of general-purpose

KS4/P4 KS5/P3 KS6/P2

of key inputs

output ports (+ P1)

0

0

KS4

KS5

KS6

30

0 (+1)

1

0

KS4

KS5

P2

25

1 (+1)

0

1

KS4

P3

P2

20

1

1

P4

P3

P2

15

2 (+1)

3 (+1)

Note: KSn (n = 4 to 6): Key scan output ports

Pn (n = 4 to 2): General-purpose output ports

2.KC1 to KC6: Key scan output state setting data

These control data bits set the states of the key scan output pins KS1 to KS6.

Output pins

KS1

KS2

KS3

KS4

KS5

KS6

Key scan output state setting data

KC1

KC2

KC3

KC4

KC5

KC6

For example, if the KS4/P4 to KS6/P2 output pins are set to function as key scan output ports, when KC1 to KC3 are

set to 1 and KC4 to KC6 are set to 0, in the key scan standby state, the KS1 to KS3 output pins will output the high

level (VDD) and the KS4 to KS6 pins will output the low level (VSS). Note that key scan output signals are not output

from output pins that are set to the low level.

3.PC1 to PC4: General-purpose output port state setting data

These control data bits set the states of the general-purpose output ports P1 to P4.

Output pins

P1

P2

P3

P4

General-purpose output port state setting data

PC1

PC2

PC3

PC4

For example, if the KS4/P4 to KS6/P2 output pins are set to function as general-purpose output ports, when PC1 and

PC2 are set to 1, and PC3 and PC4 are set to 0, the P1 and P2 output pins will output the high level (VDD), and P3 and

P4 will output the low level (VSS).

No. 7632-8/16

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