RFHCS362G-I/SO Microchip Technology, RFHCS362G-I/SO Datasheet - Page 14

• Manufacturer Part Number: RFHCS362G-I/SO
• Description: IC CODE HOPPNG ENCDR W/RF 18SOIC
• Manufacturer: Microchip Technology

Specifications of RFHCS362G-I/SO

• Frequency: 310MHz ~ 440MHz
• Applications: Automotive, Building Access, Garage Openers
• Modulation Or Protocol: ASK, FSK
• Data Rate - Maximum: 3.3 kbps
• Power - Output: -12dBm ~ 2dBm
• Current - Transmitting: 11.5mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.2 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 18-SOIC (0.300", 7.50mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -

rfHCS362G/362F
3.1
The rfHCS362 transmission is made up of several code
words. Each code word consists of a preamble, a
header and data (see Figure 3-2).
The code words are separated by a Guard Time that
can be set to 0 ms, 6.4 ms, 25.6 ms or 76.8 ms with the
Guard Time Select (
option. All other timing specifications for the modulation
formats are based on a basic timing element (T
Timing Element can be set to 100 s, 200 s, 400 s
or 800 s with the Baud Rate Select (
FIGURE 3-2:
FIGURE 3-3:
FIGURE 3-4:
DS41189A-page 14
Preamble
Transmission Modulation Format
1
1 2
Preamble
CODE WORD TRANSMISSION SEQUENCE
MANCHESTER TRANSMISSION FORMAT
PULSE WIDTH MODULATION TRANSMISSION FORMAT
Header
16
GUARD
31 T
START bit
Header
1 CODE WORD
E
Preamble
[
0..1
Encrypt
bit 0 bit 1 bit 2
]) configuration
BSEL
Encrypted
Portion
Fixed
[
E
0..1
). This
16
Header
Preliminary
3/10
T
])
E
Guard
Encrypted
Portion
configuration option. The Header Time can be set to
3 T
uration option.
There are two different modulation formats available on
the rfHCS362 that can be set using the Modulation
Select (MOD) configuration option:
• Pulse Width Modulation (PWM)
• Manchester Encoding
Modulation formats are shown in Figure 3-3 and
Figure 3-4. Code word data formats are shown in
Figure 3-6.
E
Fixed Code
or 10 T
Portion
Preamble
E
with the Header Select (HEADER) config-
LOGIC "0"
LOGIC "1"
Fixed Code
Portion
STOP bit
LOGIC "0"
LOGIC "1"
Header
2002 Microchip Technology Inc.
Guard
Time
T
E
T
Encrypt
Guard
Time
E
T
T
T
BP
BP
E
T
E
T
E