Silan

Semiconductors

SC50560

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.3

2002-03-21

3

PIN DESCRIPTION

Pin No.

Pin Name

Input/output

Description

--

Negative Power Supply

2

TEST

I

Test Pin. This pin is normally connected to VSS.

3

SEL

I

Select Pin for SC50560-001/003.

4

OSCI

I

Oscillation Input Pin

5

OSCO

O

Oscillation Output Pin

6

CS

I

Code Select Pin

7~10

KIO0~KIO3

I/O

Input/Output Pins

18~11

KO0~KO7

O

Scan Output Pins

19

Dout

O

Output Pin

20

--

Positive Power Supply

FUNCTIONAL DESCRIPTION

SC50560 is capable of transmitting up to 256 different instructions and 8 bits custom codes using a 16-bit PCM

Code with a leader code. Furthermore, oscillation is normally stopped when there is no operating, thereby, lower

power dissipation.

1. TRANSMISSION CODE

SC50560 transmission code consists of a leader code, 8 bits custom code (C0 to C7) followed by a sync. bit

and 8 bits data code (D0 to D7) followed another sync. bit. The custom and the data codes are separated by a

separator. Please refer to the diagram below:

C1 C2 C3

C5

C4

C6

Leader Pulse

8 Bits Custom Code

C7

SYNC

D0 D1 D2 D3 D4 D5 D6 D7

SYNC

Sync. Bit

8 Bits Data Code

Sync. Bit

Seperator

Figure 1. SC50560 Transmission Code Format

One transmission Code Word consists of a 19-bit pulse (that is the leader pulse plus the 16 bits code) and the

separator. It is transferred in a 63.4ms for as long as the key is depressed. Please refer to the diagram below:

C0

SEPARATOR

8.4ms

4.2ms

ONE CODE WORD

63.4ms

4.2ms

8BITS CUSTOM CODE

LEADER CODE

8BITSDATACODE

C1 C2

C3 C4 C5 C6 C7

SYNC

D0 D1

D2 D3 D4 D5 D6 D7

SYNC

Figure 2. SC50560 Detailed Code Word Format