S5G9802X01 Просмотр технического описания (PDF) - Samsung

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S5G9802X01

INFRAED REMOCON RECEIVER

Samsung 

INFRAED REMOCON RECEIVER

S5G9802X01

FUNCTIONAL DESCRIPTION

1. OSCILLATION CIRCUIT

• The oscillation circuit is activated when any key is depressed. The ceramic resonator connected to XI, XO is

normally operated at 455kHz oscillation frequency.

fosc

XI 2

C1

3 XO

2 3 --- XI, XO Terminals

C1, C2 = 100pF

ceramic

resonator

C2

Figure 3.

2. KEY INPUT & STROBE OUTPUT

• All key input pins have a pull down resistor to VSS. 18 keys can be connected by key input K1 - K6 and 6x3

matrix by means of strobe signal ST1 - ST3.

• Multiple keying is possible for the keys connected to ST1 Line (key No. 1 - 6), and all depressed keys are

output (Output becomes continuous pulses).

• Among the strobe signal lines, priority is set in the order, ST1>ST2>ST3.

The keys connected to ST2 and ST3 lines have priority and when input is made through more than 2 keys, and

single signal is preferentially output in order of K1 - K6.

• Finally, the keys connected to ST2 and ST3 lines are for single signals and no second signal is transmitted

unless input is made again after the key is released once.

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