參數(shù)資料
型號: HCS473-PROM
廠商: Microchip Technology Inc.
英文描述: Code Hopping Encoder and Transponder
中文描述: 跳碼編碼器和轉發(fā)器
文件頁數(shù): 14/68頁
文件大?。?/td> 1629K
代理商: HCS473-PROM
HCS473
DS40035C-page 12
Preliminary
2002 Microchip Technology Inc.
FIGURE 3-1:
GENERAL CODE WORD FORMAT
FIGURE 3-2:
CODE WORD ORGANIZATION
Preamble
Header
Guard
Time
Data Bits
S2
S1
S0 S3
Counter
20 Bits
Synchronization
LSb
V
LOW
1-Bit
Fixed Code Portion (35 Bits)
CRC
2 Bits
V
LOW
1-Bit
SER 1
Most Sig 16 Bits
SER 0
Least Sig 16 Bits
BUT
4 Bits
DISCRIM
8 Bits
20
0
Hopping Code Portion Message (32 Bits)
C1 C0
MSb
67 Data bits
Transmitted LSb first.
Hopping Code:
Fixed Code Portion (37 Bits)
QUE
2 Bits
CRC
2 Bits
BUT
4 Bits
S2
S1
S0 S3
SER 0
Least Sig16 Bits
BUT
4 Bits
Counter
Overflow
2 Bits
DISCRIM
10 Bits
Synchronization
Counter
16 Bits
15
0
S2
S1
S0 S3
OVR1
OVR0
Hopping Code Portion Message (32 Bits)
Q1 Q0 C1 C0
MSb
LSb
69 Data bits
Transmitted LSb first.
SER 1
12 MSb’s
Hopping Code:
CRC
2 Bits
V
LOW
1-Bit
BUT
4 Bits
SDVAL3
12 Most Sig Bits
1
1
1
1
SDVAL2
16 Bits
SDVAL1
16 Bits
SDVAL0
16 Least Sig Bits
C1 C0
LSb
MSb
Shaded 65 bits included in CRC calculation
69 Data bits
Transmitted LSb first.
Fixed Code Portion (9 Bits)
Seed Value (60 Bits)
Seed Code:
20-bit Synchronization Counter (CNTSEL=1)
Button Queuing disabled (QUEN=0)
16-bit Synchronization Counter (CNTSEL=0)
Button Queuing enabled (QUEN=1)
32-bit Serial Number (XSER = 1)
28-bit Serial Number (XSER = 0)
Queuing enabled (QUE = 1)
QUE
2 Bits
Q1 Q0
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