HL14104 Ver la hoja de datos (PDF) - Hyundai Micro Electronics

Número de pieza

componentes Descripción

Fabricante

HL14104

LCD Driver

Hyundai Micro Electronics 

HL15604

“L” KS1

“L” KS2

“L” KS3

“L” KS4

“L” KS5

“H” KS6

When any one of these keys is pressed, the

oscillator on the OSC pin is started and the keys

are scanned.

*)

KIN1

KIN2

KIN3

KIN4

KIN5

*) These diodes are required to reliable recognize multiple key presses on the KS6 line when sleep mode state with only

KS6 high, as in the above example. That is, these diodes prevent incorrect operation due to sneak currents in the KS6

key scan output signal when keys on the KS1 to KS5 lines are pressed at the same time.

Key input

(KS6 line)

Key Scan

800T

800T

CE

Write

address

SI

Write

address

Read

address

Write

address

Read

address

SO

Key data read request

Key data read

Key data read

Key data read request

Multiple Key Presses

Although the HL14104 is capable of key scanning without inserting diodes for

dual key presses, triple key presses on the KIN1 to KIN5 input pin lines, or mult-

iple key presses on the KS1 to KS6 output pin lines, multiple presses other than

these cases may result in keys that were not pressed recognized as having been

pressed. Therefore, a diode must be inserted in series with each key. Application

that do not recognize multiple key presses of threes or keys should check the key

data for three or more 1 bits and ignore such data.

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