HCS101T-I/SN Microchip Technology, HCS101T-I/SN Datasheet - Page 4

• Manufacturer Part Number: HCS101T-I/SN
• Description: IC ENCODER FIXED CODE 8-SOIC
• Manufacturer: Microchip Technology
• Type: Fixed Code Encoderr

Specifications of HCS101T-I/SN

• Applications: Remote Control
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

HCS101
3.0
3.1
The HCS101 transmission is made up of several code
words as shown in Figure 3-1. Each code word starts
with a preamble and a header, followed by the data.
The code word is followed by a guard period before the
next code word begins. The same code word is trans-
mitted as long as the button is pressed. Refer to
Table 7-3 for transmission timing requirements.
FIGURE 3-1:
FIGURE 3-2:
DS41115C-page 4
MSb
* See Section 4.3.6, S3 Setting (S3SET)
** See Section 4.3.7 Extended Serial Number (XSER)
*** Serial Number 2 is transmitted when all buttons are pressed
(1 bit)
Start Pulse
‘1’
TRANSMITTED WORD
Transmission Format (PWM Mode)
(Te)
(1 bit)
V
LOW
T
E
CODE WORD TRANSMISSION FORMAT
CODE WORD ORGANIZATION
S2 S1 S0 S3*
Function**
(0/4 bits)
Preamble
Tp
Period
Bit
Serial Number 1
(32/28 bits)**
LOGIC ‘0’
LOGIC ‘1’
Header
Th
Preliminary
Counter, SER_3
and Function
(16 bits)
Counter
3.2
The HCS101 transmits a 66-bit code word. The 66-bit
word is constructed from the serial numbers, counter
and function information. The code word format is
shown in Figure 3-2.
Under normal conditions, serial number 1 is transmitted
with the counter and serial number 3. If all the buttons
are pressed, serial number 2 is transmitted in place of
the counter and serial number 3.
Code Word Organization
Serial Number 2***
Function
S2 S1 S0 S3*
(4 bits)
(32 bits)
and Function
SER_1
(2 bits)
©
‘00’
2001 Microchip Technology Inc.
Transmission Direction
LSb first
Serial Number 3
(10 bits)
Guard
Time
Tg
LSb