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HCS362T-I/P bảng dữ liệu(PDF) 19 Page - Microchip Technology

tên linh kiện HCS362T-I/P
Giải thích chi tiết về linh kiện  KEELOQ Code Hopping Encoder
PDF  38 Pages
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nhà sản xuất  MICROCHIP [Microchip Technology]
Trang chủ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

HCS362T-I/P bảng dữ liệu(HTML) 19 Page - Microchip Technology

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© 2002 Microchip Technology Inc.
Preliminary
DS40189D-page 19
HCS362
4.6
SYNCHRONOUS MODE
In Synchronous mode, the code word can be clocked
out on DATA using S2 as a clock. To enter Synchro-
nous mode, DATA and S0 must be taken HIGH and
then S2 is taken HIGH. After Synchronous mode is
entered, S0 must be taken LOW. The data is clocked
out on DATA on every rising edge of S2. Auto-shutoff
timer is not disabled in Synchronous mode. This can be
used to implement RF testing.
FIGURE 4-1:
SYNCHRONOUS TRANSMISSION MODE
FIGURE 4-2:
CODE WORD ORGANIZATION (SYNCHRONOUS TRANSMISSION MODE)
“01,10,11”
DATA
S2
S[1:0]
TPS
TPH1 TPH2
t = 50ms
Preamble
Header
Data
RFEN
TRFON
QUEUE
(2 bits)
CRC
(2 bits)
Vlow
(1-bit)
Button
Status
S2 S1 S0 S3
Serial Number
(28 bits)
Button
Status
S2 S1 S0 S3
DISC+ OVR
(12 bits)
Sync Counter
(16 bits)
69 Data bits
Transmitted
LSb first.
LSb
MSb
Fixed Portion
Encrypted Portion



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