SC3010S ETC [List of Unclassifed Manufacturers], SC3010S Datasheet - Page 5

• Manufacturer Part Number: SC3010S
• Description: INFRARED REMOTE CONTROL TRANSMITTER
• Manufacturer: ETC [List of Unclassifed Manufacturers]

Start Bits (2xLogic 1), 1 Control Bit, 5 System Bits, and 6 Command Bits. Please refer to the diagram above for the
data output format. (See also Command and System Matrixes).
experienced followed by a 2-bit scan cycle time. During the scanning cycle the outputs are switched to the
conductive state one at a time.
transmits the generated data modulated by 1/12 of the oscillator frequency with a 25% duty factor.
Outputs (KO0~KO7) are open drain n-channel and conduct when the circuit is in the quiescent state.
4. SYSTEM MODES
a). Combined System Mode (SMS=Low)
They are pulled to LOW state when an output is connected, to them as a result of a legal key operation. A legal key
operation in the KI-KO or C-KO Matrix will initiate a debounce cycle. Once key contact has been established for 18-
bit time without any interruption, the Oscillator Enable Signal is latched and the key may be released. The device is
reset when there is an interruption during the 18-bit time period. At the end of the debounce cycle, KO Outputs are
switched off and two scan cycles begins.
(KI-Input) Latches. After latching a system number, the device will generate the last command (i.e. all command bits
logic 1) in the selected system for as long as the key is pressed. Latching of a command number causes the chip to
generate this command together with the system number stored in the system latch. By releasing the key, the device
will be reset if no data is to be transmitted at the time. The complete code frame is transmitted even if the key is
released during code transmission.
The generated information is transmitted through the output signal D
After a legal key operation is performed, the KO outputs are switched off and a 16-bit debounce time period is
Code is transmitted using a biphase technique. Please refer to the diagram below. The MDOUT Output Signal
Both the D
The KI and the C Sense Inputs have p-channel pull-up transistors (meaning they are normally in HIGH state).
When KI or C Input senses a low level output, a Latch-Enable Signal is fed to the System (C-Input) or Command
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Silan
Semiconductors
OUT
and the MD
where: 1 bit-time=3x2
OUT
Logic 1
Figure 2: Biphase Code Transmission Technique
are non-conducting (3-state outputs) when in the quiescent state. The Scan Driver
8
xTosc=1.688ms (typ. Tosc=1/455KHz)
5
OUT
Logic 0
. The Data Output Code consists of 1.5
SC3010
Rev: 2.1
2002-02-28