SM5221 SAMHOP [SamHop Microelectronics Corp.], SM5221 Datasheet - Page 5

• Manufacturer Part Number: SM5221
• Description: 32 KEYS ENCODER
• Manufacturer: SAMHOP [SamHop Microelectronics Corp.]

TRANSMISSION CODE
(1) DOUT Output
The leader code consists of a 9 ms carrier waveform plus a 4.5 ms OFF waveform, and is
used as the leader for the following code. The code uses the PPM (Pulse Position
Modulation) method, with "1" and "0" differentiated by the time between pulses reference
following diagram. Each code consists of 8 bits, and simultaneous transmission of the
inverse code.
The transmission code consists of a leader code, 16-bit custom code, and 8-bit data code.
The inverse code of the data code is also sent simultaneously, giving a total configuration
of 32 bits per transmission.
三合微科股份有限公司
S
Leader
Code
0.56 ms
AM
9 ms
13.5 ms
Leader
H
Code
1.125 ms
OP
Bit 0
4.5 ms
0.56 ms
Microelectronics Corp.
C0
C1 C2
Custom Code
Custom Code
C3
8 bits
C4
C5
18 ms to 36 ms
C6
C7
C0'
58.5 to 76.5 ms
DOUT Output Code
Custom Code'
C1' C2' C3' C4' C5' C6' C7' D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7
2.25 ms
Custom Code'
Bit 1
8 bits
Page 5
Data Code
8 bits
Data Code
Data Code
SM5221-001/002
8 bits
32 KEYS ENCODER
Data Code
V.2.0 Mar 8,2002