SLS SL3010D, SL3010N Datasheet

SL3010

System Logic

Semiconductor

SLS

INFRARED REMOTE CONTROL
TRANSMITTER RC-5

The SL3010 is intended as a general purpose (RC-5) infrared
remote control system for use where a low voltage supply and a large
debounce time are expected. The device can generate 2048 different
commands and utilizes a keyboard with a single pole switch for each
key. The command are arranged so that 32 systems can be addressed,
each system containing 64 different commands. The keyboard
interconnection is illustrated by Fig.1.

• Low voltage requirement

• Single pin oscillator

• Biphase transmission technique

• Test mode facility

ORDERING INFORMATION

SL3010N Plastic

SL3010D SOIC

TA = -25° to 85° C

for all packages.

BLOCK DIAGRAM

PIN ASSIGNMENT

SL3010

System Logic

Semiconductor

SLS

PIN DESCRIPTION

PIN No DESIGNATION DESCRIPTION

1 X7 (IPU) sense input from key matrix
2 SSM (I) system mode selection input
3-6 Z0-Z3 (IPU) sense inputs from key matrix
7 MDATA (OP3) generated output data modulated with 1/2 the oscillator frequency at a 25%

duty factor
8 DATA (OP3) generated output information
9-13 DR7-DR3 (ODN) scan drivers
14 GND ground (0V)
15-17 DR2-DR0 (ODN) scan drivers
18 OSC (I) oscillator input
19 TP2 (I) test point 2
20 TP1 (I) test point 1
21-27 X0-X6 (IPU) sense inputs from key matrix
28 Vcc (I) voltage supply

(I) = input
(IPU) = input with p-channel pull-up transistor
(ODN) = output with open drain n-channel transistor
(OP3) = output 3-state

FUNCTIONAL DESCRIPTION
Keyboard operation

Every connection of one X-input and one DR-output will be recognized as a legal key operation and will cause
the device to generate the corresponding code. The same applies to every connection of one Z-input to one DR­output with the proviso that SSM must be LOW. When SSM is HIGH a wired connection must exist between a Z­input and DR-output. If no connection is present the system number will not be generated. Activating two or
more X-inputs, Z-inputs or Z-inputs and X-inputs at the same time is an illegal action and inhibits further activity
(oscillator will not start).
When one X- or Z-input is connected to more than one DR-output, the last scan signal will be considered as legal.
The maximum value of the contact series resistance of the switched keyboard is 7KΩ.

Inputs

In the quiescent state the command inputs X0 to X7 are held HIGH by an internal pull-up transistor. When the
system mode selection (SSM) input is LOW and the system is quiescent, the system inputs Z0 to Z3 are also held
HIGH by an internal pull-up transistor. When SSM is HIGH the pull-up transistor for the Z-inputs is switched off,
in order to prevent current flow, and a wired connection in the Z-DR matrix provides the system number.

Outputs

The output signal DATA transmits the generated information in accordance with the form at illustrated by Fig.2
and Tables 1 and 2. The code is transmitted using a biphase technique as illustrated by Fig.3. The code consists
of four parts:

• Start part - 1.5 bits (2 x logic 1)

• Control part - 1 bit

• System part - 5 bits

• Command part - 6 bits

The output signal MDATA transmits the generated information modulated by 1/12 of the oscillator frequency
with a 50% duty factor.
In the quiescent state both DATA and MDATA are non-conducting (3-state outputs).
The scan driver outputs DR0 to DR7 are open drai n n-channel transistors and conduct when the circuit is
quiescent. After a legal key operation the scanning cycle is started and the outputs switched to the conductive
state one by one. The DR-outputs were switched off at the end of the preceding debounce cycle.

SL3010

System Logic

Semiconductor

SLS

Table 1 Command matrix (X-DR)

Code X-lines DR-lines Command bits

no. 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 5 4 3 2 1 0

0 x x 0 0 0 0 0 0
1 x x 0 0 0 0 0 1
2 x x 0 0 0 0 1 0
3 x x 0 0 0 0 1 1
4 x x 0 0 0 1 0 0
5 x x 0 0 0 1 0 1
6 x x 0 0 0 1 1 0
7 x x 0 0 0 1 1 1
8 x x 0 0 1 0 0 0

9 x x 0 0 1 0 0 1
10 x x 0 0 1 0 1 0
11 x x 0 0 1 0 1 1
12 x x 0 0 1 1 0 0
13 x x 0 0 1 1 0 1
14 x x 0 0 1 1 1 0
15 x x 0 0 1 1 1 1
16 x x 0 1 0 0 0 0
17 x x 0 1 0 0 0 1
18 x x 0 1 0 0 1 0
19 x x 0 1 0 0 1 1
20 x x 0 1 0 1 0 0
21 x x 0 1 0 1 0 1
22 x x 0 1 0 1 1 0
23 x x 0 1 0 1 1 1
24 x x 0 1 1 0 0 0
25 x x 0 1 1 0 0 1
26 x x 0 1 1 0 1 0
27 x x 0 1 1 0 1 1
28 x x 0 1 1 1 0 0
29 x x 0 1 1 1 0 1
30 x x 0 1 1 1 1 0
31 x x 0 1 1 1 1 1
32 x x 1 0 0 0 0 0
33 x x 1 0 0 0 0 1
34 x x 1 0 0 0 1 0
35 x x 1 0 0 0 1 1
36 x x 1 0 0 1 0 0
37 x x 1 0 0 1 0 1
38 x x 1 0 0 1 1 0
39 x x 1 0 0 1 1 1
40 x x 1 0 1 0 0 0
41 x x 1 0 1 0 0 1
42 x x 1 0 1 0 1 0
43 x x 1 0 1 0 1 1
44 x x 1 0 1 1 0 0
45 x x 1 0 1 1 0 1
46 x x 1 0 1 1 1 0
47 x x 1 0 1 1 1 1
48 x x 1 1 0 0 0 0