SC50462 View Datasheet(PDF) - Unspecified
Part Name
Description
Manufacturer
SC50462 Datasheet PDF : 12 Pages
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Silan
Semiconductors
SC50462
2. OSCILLATING CIRCUIT
An oscillator circuit may be constructed by using a 480kHz or 455kHz Crystal Resonator and two capacitors.
Please refer to the following diagram. The carrier frequency transmitted is 40kHz or 37.9kHz.Unless any legal key
input is activated, the oscillation is automatically stopped. Thus ,power consumption is considerably reduced.
SC50462
OSCI
OSCO
2
3
480kHz/
455kHz
200pF
200pF
3. KEY INPUT
A total of 64 keys may be connected by Input Pins(I1~I8) and Output Pins(S1~S8) to form an 8x8 Key Matrix.
Double key operation is possible for only one of the keys—SW25~SW28 in combination with any one of the keys –
SW11~SW13. Any other key combination are regards as illegal and will not generate any activity. Thus, only the
following key combinations may be used for the doubled key operation:
I8 I7 I6 I5 I4 I3 I2 I1
SW11
S1
SW12
S2
SW13
S3
S4
SW25
S5
SW26
S6
SW27
S7
SW28
S8
Note:
SC50462 permits two keys
function but only “ ” key are
allowed.
When you push one key of
SW11/12/13, you can push with
another key of SW25/26/27/28.
Otherwise, other conditions are
illegal.
SW25 and SW11
SW25 and SW12
SW25 and SW13
SW27 and SW11
SW27 and SW12
SW27 and SW13
SW26 and SW11
SW26 and SW12
SW26 and SW13
SW28 and SW11
SW28 and SW12
SW28 and SW13
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.1 2002-02-28
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