Silan
Semiconductors
SC6122
FUNCTIONAL DESCRIPTION
1. TRANSMISSION CODE
The transmission code consists of a leader code, 16-bits custom codes, and 8-bits data codes. The inverse
code of the data code is also sent simultaneously. The following diagram shows this one frame construction.
C0' C0' C0' C0' C0' C0' C0' C0'
C0 C1 C2 C3 C4 C5 C6 C7
D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7
C0 C1 C2 C3 C4 C5 C6 C7
Leader
Code
Custom Code
8 bits
Custom Code'
8 bits
Key Data
Key Data
8 bits
8 bits
The leader codes consist of a 9ms carrier waveform followed by a 4.5ms OFF waveform. It is used as the leader
for the following code. Thus, when reception is configured by a microcomputer, the time relationship between the
reception detection and other processes can be managed efficiently. The code uses the PPM (Pulse Position
Modulation) Method, with "0" and "1" differentiated by the time between pulses. Each code consists of 8 bits, and
simultaneous transmission of the inverse code allows configuration of a system with an extremely low error rate.
2. KEY INPUT MATRIX
The Key Input Matrix of SC6122 if given below:
KI0
KI1
KI2
KI3
KI4
KI5
KI6
KI7
1
2
3
4
5
6
7
8
9
13 17 21 25 29
10 14 18 22 26 30
11 15 19 23 27 31
12 16 20 24 28 32
33 37 41 45 49 53 57 61
34 38 42 46 50 54 58 62
35 39 43 47 51 55 59 63
36 40 44 48 52 56 60 64
3. KEY INPUT
A total of 64 keys can be connected by SC6122 Key Input Pins--KI0~KI7 and the Timing Signal Output Pins
KI/O0~KI/O7.
Double Key Operation is possible for only Key No.21 in combination with other keys connected to the KI/O5 line
namely: Key No.22,23 or 24.thus, only the following key combinations may be used for the double key operation:
1. Key Nos.21 and 22
;
2. Key Nos.21 and 23
;
3. Key Nos.21 and 24
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2
2002-03-01
4
SILAN [ SILAN MICROELECTRONICS JOINT-STOCK ]
