SC9148B(2002) Ver la hoja de datos (PDF) - Silan Microelectronics
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SC9148B Datasheet PDF : 9 Pages
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Silan
Semiconductors
SC9148B
Data of C1 , C2 and C3 code bit become “1” when diodes are connected to CODE Terminal through Timing
Signal Terminals T1 ~T3, and ‘0’ when not connected . (In the above diagram , C1 , C2 and C3 are “1” , “1” and “1”
data . )
The SC9148P has 3 code bits . However , the SC9149P that is a receiving IC ( DIP 16 PIN ) and the SC9150P
(DIP 24 PIN ) are able to use only C2 and C3 , and C1 and C2 2 code bits , respectively .
Therefore , diodes must be connected so that code bit data of the SC9148P agreement with the receiving IC .
Note : For C3 and C1 code bit data not used on the SC9150P and SC9149P , it is necessary to transmit ‘1’ and
diodes must be so connected .
6. TRANSMITTING WAVEFORM
6.1 BASIC TRANSMITTING WAVEFORM (at fosc=455kHz)
C1~C3: CODE BIT READER
H,S1,S2: HOLD/SINGLE PULSE READER
K1~K6: KEY INPUT READER
C1 C2 C3
H
S1 S2 K1 K2 K3 K4 K5 K6
a
3a
48a
Basic transmitting waveform is 12-bits serial data in configuration as shown above.
The time of each bit “ a” is decided as shown below by oscillation frequency fosc by means of XT and non-XT.
a=(1/fosc)×192(sec)
6.2 DISTINCTION OF BIT “0” AND “1”
a
BIT "0"
3a
BIT "1"
01
01
0
01
0
01
0
0
One word of the above transmission command is in the configuration of (010100100100).
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Rev: 2.1 2002.09.10.
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